Mercurial > hg
annotate mercurial/worker.py @ 39583:ee1e74ee037c
formatter: fill missing resources by formatter, not by resource mapper
While working on demand loading of ctx/fctx objects, I found it's weird
to support lookup in both directions. For instance, fctx can be loaded
from (ctx, path) pair, but ctx may also be derived from fctx.changectx()
in the original mapping. If the original mapping has had fctx but no ctx,
and if the new mapping provides {path}, we can't be sure if fctx should be
updated by fctx'.changectx()[path] or not.
This patch simply drops the support for the resolution in fctx -> ctx -> repo
direction.
author | Yuya Nishihara <yuya@tcha.org> |
---|---|
date | Sat, 01 Sep 2018 13:21:45 +0900 |
parents | c08ea1e219c0 |
children | 909c31805f54 03f7d0822ec1 |
rev | line source |
---|---|
18635
fed06dd07665
worker: count the number of CPUs
Bryan O'Sullivan <bryano@fb.com>
parents:
diff
changeset
|
1 # worker.py - master-slave parallelism support |
fed06dd07665
worker: count the number of CPUs
Bryan O'Sullivan <bryano@fb.com>
parents:
diff
changeset
|
2 # |
fed06dd07665
worker: count the number of CPUs
Bryan O'Sullivan <bryano@fb.com>
parents:
diff
changeset
|
3 # Copyright 2013 Facebook, Inc. |
fed06dd07665
worker: count the number of CPUs
Bryan O'Sullivan <bryano@fb.com>
parents:
diff
changeset
|
4 # |
fed06dd07665
worker: count the number of CPUs
Bryan O'Sullivan <bryano@fb.com>
parents:
diff
changeset
|
5 # This software may be used and distributed according to the terms of the |
fed06dd07665
worker: count the number of CPUs
Bryan O'Sullivan <bryano@fb.com>
parents:
diff
changeset
|
6 # GNU General Public License version 2 or any later version. |
fed06dd07665
worker: count the number of CPUs
Bryan O'Sullivan <bryano@fb.com>
parents:
diff
changeset
|
7 |
25992
2d76f8a2d831
worker: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25660
diff
changeset
|
8 from __future__ import absolute_import |
2d76f8a2d831
worker: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25660
diff
changeset
|
9 |
2d76f8a2d831
worker: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25660
diff
changeset
|
10 import errno |
2d76f8a2d831
worker: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25660
diff
changeset
|
11 import os |
2d76f8a2d831
worker: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25660
diff
changeset
|
12 import signal |
2d76f8a2d831
worker: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25660
diff
changeset
|
13 import sys |
35427
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
14 import threading |
35432
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
15 import time |
25992
2d76f8a2d831
worker: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25660
diff
changeset
|
16 |
38729
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
17 try: |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
18 import selectors |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
19 selectors.BaseSelector |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
20 except ImportError: |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
21 from .thirdparty import selectors2 as selectors |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
22 |
25992
2d76f8a2d831
worker: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25660
diff
changeset
|
23 from .i18n import _ |
30396 | 24 from . import ( |
30635
a150173da1c1
py3: replace os.environ with encoding.environ (part 2 of 5)
Pulkit Goyal <7895pulkit@gmail.com>
parents:
30521
diff
changeset
|
25 encoding, |
30396 | 26 error, |
30639
d524c88511a7
py3: replace os.name with pycompat.osname (part 1 of 2)
Pulkit Goyal <7895pulkit@gmail.com>
parents:
30635
diff
changeset
|
27 pycompat, |
30521
86cd09bc13ba
worker: use os._exit for posix worker in all cases
Jun Wu <quark@fb.com>
parents:
30425
diff
changeset
|
28 scmutil, |
30396 | 29 util, |
30 ) | |
18635
fed06dd07665
worker: count the number of CPUs
Bryan O'Sullivan <bryano@fb.com>
parents:
diff
changeset
|
31 |
fed06dd07665
worker: count the number of CPUs
Bryan O'Sullivan <bryano@fb.com>
parents:
diff
changeset
|
32 def countcpus(): |
fed06dd07665
worker: count the number of CPUs
Bryan O'Sullivan <bryano@fb.com>
parents:
diff
changeset
|
33 '''try to count the number of CPUs on the system''' |
26568
c0501c26b05c
worker: restore old countcpus code (issue4869)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26063
diff
changeset
|
34 |
c0501c26b05c
worker: restore old countcpus code (issue4869)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26063
diff
changeset
|
35 # posix |
18635
fed06dd07665
worker: count the number of CPUs
Bryan O'Sullivan <bryano@fb.com>
parents:
diff
changeset
|
36 try: |
32611
954489932c4f
py3: pass str in os.sysconf()
Pulkit Goyal <7895pulkit@gmail.com>
parents:
32112
diff
changeset
|
37 n = int(os.sysconf(r'SC_NPROCESSORS_ONLN')) |
26568
c0501c26b05c
worker: restore old countcpus code (issue4869)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26063
diff
changeset
|
38 if n > 0: |
c0501c26b05c
worker: restore old countcpus code (issue4869)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26063
diff
changeset
|
39 return n |
c0501c26b05c
worker: restore old countcpus code (issue4869)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26063
diff
changeset
|
40 except (AttributeError, ValueError): |
c0501c26b05c
worker: restore old countcpus code (issue4869)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26063
diff
changeset
|
41 pass |
c0501c26b05c
worker: restore old countcpus code (issue4869)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26063
diff
changeset
|
42 |
c0501c26b05c
worker: restore old countcpus code (issue4869)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26063
diff
changeset
|
43 # windows |
c0501c26b05c
worker: restore old countcpus code (issue4869)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26063
diff
changeset
|
44 try: |
30635
a150173da1c1
py3: replace os.environ with encoding.environ (part 2 of 5)
Pulkit Goyal <7895pulkit@gmail.com>
parents:
30521
diff
changeset
|
45 n = int(encoding.environ['NUMBER_OF_PROCESSORS']) |
26568
c0501c26b05c
worker: restore old countcpus code (issue4869)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26063
diff
changeset
|
46 if n > 0: |
c0501c26b05c
worker: restore old countcpus code (issue4869)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26063
diff
changeset
|
47 return n |
c0501c26b05c
worker: restore old countcpus code (issue4869)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26063
diff
changeset
|
48 except (KeyError, ValueError): |
c0501c26b05c
worker: restore old countcpus code (issue4869)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26063
diff
changeset
|
49 pass |
c0501c26b05c
worker: restore old countcpus code (issue4869)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26063
diff
changeset
|
50 |
c0501c26b05c
worker: restore old countcpus code (issue4869)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26063
diff
changeset
|
51 return 1 |
18636
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
52 |
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
53 def _numworkers(ui): |
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
54 s = ui.config('worker', 'numcpus') |
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
55 if s: |
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
56 try: |
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
57 n = int(s) |
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
58 if n >= 1: |
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
59 return n |
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
60 except ValueError: |
26587
56b2bcea2529
error: get Abort from 'error' instead of 'util'
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
26568
diff
changeset
|
61 raise error.Abort(_('number of cpus must be an integer')) |
18636
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
62 return min(max(countcpus(), 4), 32) |
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
63 |
35427
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
64 if pycompat.isposix or pycompat.iswindows: |
38730
69ed2cff4277
worker: rename variable to reflect constant
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38729
diff
changeset
|
65 _STARTUP_COST = 0.01 |
38731
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
66 # The Windows worker is thread based. If tasks are CPU bound, threads |
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
67 # in the presence of the GIL result in excessive context switching and |
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
68 # this overhead can slow down execution. |
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
69 _DISALLOW_THREAD_UNSAFE = pycompat.iswindows |
18636
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
70 else: |
38730
69ed2cff4277
worker: rename variable to reflect constant
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38729
diff
changeset
|
71 _STARTUP_COST = 1e30 |
38731
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
72 _DISALLOW_THREAD_UNSAFE = False |
18636
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
73 |
38731
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
74 def worthwhile(ui, costperop, nops, threadsafe=True): |
18636
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
75 '''try to determine whether the benefit of multiple processes can |
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
76 outweigh the cost of starting them''' |
38731
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
77 |
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
78 if not threadsafe and _DISALLOW_THREAD_UNSAFE: |
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
79 return False |
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
80 |
18636
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
81 linear = costperop * nops |
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
82 workers = _numworkers(ui) |
38730
69ed2cff4277
worker: rename variable to reflect constant
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38729
diff
changeset
|
83 benefit = linear - (_STARTUP_COST * workers + linear / workers) |
18636
dcb27c153a40
worker: estimate whether it's worth running a task in parallel
Bryan O'Sullivan <bryano@fb.com>
parents:
18635
diff
changeset
|
84 return benefit >= 0.15 |
18637
ac4dbceeb14a
worker: partition a list (of tasks) into equal-sized chunks
Bryan O'Sullivan <bryano@fb.com>
parents:
18636
diff
changeset
|
85 |
38731
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
86 def worker(ui, costperarg, func, staticargs, args, threadsafe=True): |
18638
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
87 '''run a function, possibly in parallel in multiple worker |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
88 processes. |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
89 |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
90 returns a progress iterator |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
91 |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
92 costperarg - cost of a single task |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
93 |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
94 func - function to run |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
95 |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
96 staticargs - arguments to pass to every invocation of the function |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
97 |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
98 args - arguments to split into chunks, to pass to individual |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
99 workers |
38731
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
100 |
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
101 threadsafe - whether work items are thread safe and can be executed using |
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
102 a thread-based worker. Should be disabled for CPU heavy tasks that don't |
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
103 release the GIL. |
18638
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
104 ''' |
35431
471918fa7f46
workers: add config to enable/diable workers
Wojciech Lis <wlis@fb.com>
parents:
35428
diff
changeset
|
105 enabled = ui.configbool('worker', 'enabled') |
38731
ef3838a47503
worker: ability to disable thread unsafe tasks
Gregory Szorc <gregory.szorc@gmail.com>
parents:
38730
diff
changeset
|
106 if enabled and worthwhile(ui, costperarg, len(args), threadsafe=threadsafe): |
18638
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
107 return _platformworker(ui, func, staticargs, args) |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
108 return func(*staticargs + (args,)) |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
109 |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
110 def _posixworker(ui, func, staticargs, args): |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
111 workers = _numworkers(ui) |
18708
86524a70c0f6
worker: fix a race in SIGINT handling
Bryan O'Sullivan <bryano@fb.com>
parents:
18707
diff
changeset
|
112 oldhandler = signal.getsignal(signal.SIGINT) |
86524a70c0f6
worker: fix a race in SIGINT handling
Bryan O'Sullivan <bryano@fb.com>
parents:
18707
diff
changeset
|
113 signal.signal(signal.SIGINT, signal.SIG_IGN) |
30413 | 114 pids, problem = set(), [0] |
30410
7a5d6e2fd2d5
worker: move killworkers and waitforworkers up
Jun Wu <quark@fb.com>
parents:
30396
diff
changeset
|
115 def killworkers(): |
30423
237b2883cbd8
worker: make sure killworkers() never be interrupted by another SIGCHLD
Yuya Nishihara <yuya@tcha.org>
parents:
30422
diff
changeset
|
116 # unregister SIGCHLD handler as all children will be killed. This |
237b2883cbd8
worker: make sure killworkers() never be interrupted by another SIGCHLD
Yuya Nishihara <yuya@tcha.org>
parents:
30422
diff
changeset
|
117 # function shouldn't be interrupted by another SIGCHLD; otherwise pids |
237b2883cbd8
worker: make sure killworkers() never be interrupted by another SIGCHLD
Yuya Nishihara <yuya@tcha.org>
parents:
30422
diff
changeset
|
118 # could be updated while iterating, which would cause inconsistency. |
237b2883cbd8
worker: make sure killworkers() never be interrupted by another SIGCHLD
Yuya Nishihara <yuya@tcha.org>
parents:
30422
diff
changeset
|
119 signal.signal(signal.SIGCHLD, oldchldhandler) |
30410
7a5d6e2fd2d5
worker: move killworkers and waitforworkers up
Jun Wu <quark@fb.com>
parents:
30396
diff
changeset
|
120 # if one worker bails, there's no good reason to wait for the rest |
7a5d6e2fd2d5
worker: move killworkers and waitforworkers up
Jun Wu <quark@fb.com>
parents:
30396
diff
changeset
|
121 for p in pids: |
7a5d6e2fd2d5
worker: move killworkers and waitforworkers up
Jun Wu <quark@fb.com>
parents:
30396
diff
changeset
|
122 try: |
7a5d6e2fd2d5
worker: move killworkers and waitforworkers up
Jun Wu <quark@fb.com>
parents:
30396
diff
changeset
|
123 os.kill(p, signal.SIGTERM) |
7a5d6e2fd2d5
worker: move killworkers and waitforworkers up
Jun Wu <quark@fb.com>
parents:
30396
diff
changeset
|
124 except OSError as err: |
7a5d6e2fd2d5
worker: move killworkers and waitforworkers up
Jun Wu <quark@fb.com>
parents:
30396
diff
changeset
|
125 if err.errno != errno.ESRCH: |
7a5d6e2fd2d5
worker: move killworkers and waitforworkers up
Jun Wu <quark@fb.com>
parents:
30396
diff
changeset
|
126 raise |
30412
7bc25549e084
worker: allow waitforworkers to be non-blocking
Jun Wu <quark@fb.com>
parents:
30411
diff
changeset
|
127 def waitforworkers(blocking=True): |
30414
5069a8a40b1b
worker: make waitforworkers reentrant
Jun Wu <quark@fb.com>
parents:
30413
diff
changeset
|
128 for pid in pids.copy(): |
5069a8a40b1b
worker: make waitforworkers reentrant
Jun Wu <quark@fb.com>
parents:
30413
diff
changeset
|
129 p = st = 0 |
5069a8a40b1b
worker: make waitforworkers reentrant
Jun Wu <quark@fb.com>
parents:
30413
diff
changeset
|
130 while True: |
5069a8a40b1b
worker: make waitforworkers reentrant
Jun Wu <quark@fb.com>
parents:
30413
diff
changeset
|
131 try: |
5069a8a40b1b
worker: make waitforworkers reentrant
Jun Wu <quark@fb.com>
parents:
30413
diff
changeset
|
132 p, st = os.waitpid(pid, (0 if blocking else os.WNOHANG)) |
30422
0e6ce6313e47
worker: fix missed break on successful waitpid()
Yuya Nishihara <yuya@tcha.org>
parents:
30416
diff
changeset
|
133 break |
30414
5069a8a40b1b
worker: make waitforworkers reentrant
Jun Wu <quark@fb.com>
parents:
30413
diff
changeset
|
134 except OSError as e: |
5069a8a40b1b
worker: make waitforworkers reentrant
Jun Wu <quark@fb.com>
parents:
30413
diff
changeset
|
135 if e.errno == errno.EINTR: |
5069a8a40b1b
worker: make waitforworkers reentrant
Jun Wu <quark@fb.com>
parents:
30413
diff
changeset
|
136 continue |
5069a8a40b1b
worker: make waitforworkers reentrant
Jun Wu <quark@fb.com>
parents:
30413
diff
changeset
|
137 elif e.errno == errno.ECHILD: |
30425
03f7aa2bd0e3
worker: discard waited pid by anyone who noticed it first
Yuya Nishihara <yuya@tcha.org>
parents:
30424
diff
changeset
|
138 # child would already be reaped, but pids yet been |
03f7aa2bd0e3
worker: discard waited pid by anyone who noticed it first
Yuya Nishihara <yuya@tcha.org>
parents:
30424
diff
changeset
|
139 # updated (maybe interrupted just after waitpid) |
03f7aa2bd0e3
worker: discard waited pid by anyone who noticed it first
Yuya Nishihara <yuya@tcha.org>
parents:
30424
diff
changeset
|
140 pids.discard(pid) |
03f7aa2bd0e3
worker: discard waited pid by anyone who noticed it first
Yuya Nishihara <yuya@tcha.org>
parents:
30424
diff
changeset
|
141 break |
30414
5069a8a40b1b
worker: make waitforworkers reentrant
Jun Wu <quark@fb.com>
parents:
30413
diff
changeset
|
142 else: |
5069a8a40b1b
worker: make waitforworkers reentrant
Jun Wu <quark@fb.com>
parents:
30413
diff
changeset
|
143 raise |
31063
18fb3cf572b4
worker: ignore meaningless exit status indication returned by os.waitpid()
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
30639
diff
changeset
|
144 if not p: |
18fb3cf572b4
worker: ignore meaningless exit status indication returned by os.waitpid()
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
30639
diff
changeset
|
145 # skip subsequent steps, because child process should |
18fb3cf572b4
worker: ignore meaningless exit status indication returned by os.waitpid()
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
30639
diff
changeset
|
146 # be still running in this case |
18fb3cf572b4
worker: ignore meaningless exit status indication returned by os.waitpid()
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
30639
diff
changeset
|
147 continue |
18fb3cf572b4
worker: ignore meaningless exit status indication returned by os.waitpid()
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
30639
diff
changeset
|
148 pids.discard(p) |
18fb3cf572b4
worker: ignore meaningless exit status indication returned by os.waitpid()
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents:
30639
diff
changeset
|
149 st = _exitstatus(st) |
30410
7a5d6e2fd2d5
worker: move killworkers and waitforworkers up
Jun Wu <quark@fb.com>
parents:
30396
diff
changeset
|
150 if st and not problem[0]: |
7a5d6e2fd2d5
worker: move killworkers and waitforworkers up
Jun Wu <quark@fb.com>
parents:
30396
diff
changeset
|
151 problem[0] = st |
30415
e8fb03cfbbde
worker: add a SIGCHLD handler to collect worker immediately
Jun Wu <quark@fb.com>
parents:
30414
diff
changeset
|
152 def sigchldhandler(signum, frame): |
e8fb03cfbbde
worker: add a SIGCHLD handler to collect worker immediately
Jun Wu <quark@fb.com>
parents:
30414
diff
changeset
|
153 waitforworkers(blocking=False) |
30424
f2d13eb85198
worker: kill workers after all zombie processes are reaped
Yuya Nishihara <yuya@tcha.org>
parents:
30423
diff
changeset
|
154 if problem[0]: |
f2d13eb85198
worker: kill workers after all zombie processes are reaped
Yuya Nishihara <yuya@tcha.org>
parents:
30423
diff
changeset
|
155 killworkers() |
30415
e8fb03cfbbde
worker: add a SIGCHLD handler to collect worker immediately
Jun Wu <quark@fb.com>
parents:
30414
diff
changeset
|
156 oldchldhandler = signal.signal(signal.SIGCHLD, sigchldhandler) |
31696
9d3d56aa1a9f
worker: flush ui buffers before running the worker
David Soria Parra <davidsp@fb.com>
parents:
31119
diff
changeset
|
157 ui.flush() |
32112
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
158 parentpid = os.getpid() |
38729
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
159 pipes = [] |
18638
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
160 for pargs in partition(args, workers): |
38729
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
161 # Every worker gets its own pipe to send results on, so we don't have to |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
162 # implement atomic writes larger than PIPE_BUF. Each forked process has |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
163 # its own pipe's descriptors in the local variables, and the parent |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
164 # process has the full list of pipe descriptors (and it doesn't really |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
165 # care what order they're in). |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
166 rfd, wfd = os.pipe() |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
167 pipes.append((rfd, wfd)) |
32112
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
168 # make sure we use os._exit in all worker code paths. otherwise the |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
169 # worker may do some clean-ups which could cause surprises like |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
170 # deadlock. see sshpeer.cleanup for example. |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
171 # override error handling *before* fork. this is necessary because |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
172 # exception (signal) may arrive after fork, before "pid =" assignment |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
173 # completes, and other exception handler (dispatch.py) can lead to |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
174 # unexpected code path without os._exit. |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
175 ret = -1 |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
176 try: |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
177 pid = os.fork() |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
178 if pid == 0: |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
179 signal.signal(signal.SIGINT, oldhandler) |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
180 signal.signal(signal.SIGCHLD, oldchldhandler) |
30521
86cd09bc13ba
worker: use os._exit for posix worker in all cases
Jun Wu <quark@fb.com>
parents:
30425
diff
changeset
|
181 |
32112
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
182 def workerfunc(): |
38729
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
183 for r, w in pipes[:-1]: |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
184 os.close(r) |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
185 os.close(w) |
32112
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
186 os.close(rfd) |
38535
8c38d2948217
worker: support more return types in posix worker
Danny Hooper <hooper@google.com>
parents:
37844
diff
changeset
|
187 for result in func(*(staticargs + (pargs,))): |
8c38d2948217
worker: support more return types in posix worker
Danny Hooper <hooper@google.com>
parents:
37844
diff
changeset
|
188 os.write(wfd, util.pickle.dumps(result)) |
32112
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
189 return 0 |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
190 |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
191 ret = scmutil.callcatch(ui, workerfunc) |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
192 except: # parent re-raises, child never returns |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
193 if os.getpid() == parentpid: |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
194 raise |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
195 exctype = sys.exc_info()[0] |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
196 force = not issubclass(exctype, KeyboardInterrupt) |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
197 ui.traceback(force=force) |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
198 finally: |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
199 if os.getpid() != parentpid: |
31118
a91c62752d08
worker: flush messages written by child processes before exit
Yuya Nishihara <yuya@tcha.org>
parents:
31063
diff
changeset
|
200 try: |
a91c62752d08
worker: flush messages written by child processes before exit
Yuya Nishihara <yuya@tcha.org>
parents:
31063
diff
changeset
|
201 ui.flush() |
32112
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
202 except: # never returns, no re-raises |
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
203 pass |
30521
86cd09bc13ba
worker: use os._exit for posix worker in all cases
Jun Wu <quark@fb.com>
parents:
30425
diff
changeset
|
204 finally: |
32112
31763785094b
worker: rewrite error handling so os._exit covers all cases
Jun Wu <quark@fb.com>
parents:
32043
diff
changeset
|
205 os._exit(ret & 255) |
30413 | 206 pids.add(pid) |
38729
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
207 selector = selectors.DefaultSelector() |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
208 for rfd, wfd in pipes: |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
209 os.close(wfd) |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
210 selector.register(os.fdopen(rfd, r'rb', 0), selectors.EVENT_READ) |
18638
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
211 def cleanup(): |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
212 signal.signal(signal.SIGINT, oldhandler) |
30416
c27614f2dec1
worker: stop using a separate thread waiting for children
Jun Wu <quark@fb.com>
parents:
30415
diff
changeset
|
213 waitforworkers() |
30415
e8fb03cfbbde
worker: add a SIGCHLD handler to collect worker immediately
Jun Wu <quark@fb.com>
parents:
30414
diff
changeset
|
214 signal.signal(signal.SIGCHLD, oldchldhandler) |
38740
c08ea1e219c0
worker: call selector.close() to release polling resources
Yuya Nishihara <yuya@tcha.org>
parents:
38731
diff
changeset
|
215 selector.close() |
18709
9955fc5ee24b
worker: handle worker failures more aggressively
Bryan O'Sullivan <bryano@fb.com>
parents:
18708
diff
changeset
|
216 status = problem[0] |
9955fc5ee24b
worker: handle worker failures more aggressively
Bryan O'Sullivan <bryano@fb.com>
parents:
18708
diff
changeset
|
217 if status: |
9955fc5ee24b
worker: handle worker failures more aggressively
Bryan O'Sullivan <bryano@fb.com>
parents:
18708
diff
changeset
|
218 if status < 0: |
9955fc5ee24b
worker: handle worker failures more aggressively
Bryan O'Sullivan <bryano@fb.com>
parents:
18708
diff
changeset
|
219 os.kill(os.getpid(), -status) |
9955fc5ee24b
worker: handle worker failures more aggressively
Bryan O'Sullivan <bryano@fb.com>
parents:
18708
diff
changeset
|
220 sys.exit(status) |
18638
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
221 try: |
38729
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
222 openpipes = len(pipes) |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
223 while openpipes > 0: |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
224 for key, events in selector.select(): |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
225 try: |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
226 yield util.pickle.load(key.fileobj) |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
227 except EOFError: |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
228 selector.unregister(key.fileobj) |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
229 key.fileobj.close() |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
230 openpipes -= 1 |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
231 except IOError as e: |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
232 if e.errno == errno.EINTR: |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
233 continue |
9e6afe7fca31
worker: use one pipe per posix worker and select() in parent process
Danny Hooper <hooper@google.com>
parents:
38535
diff
changeset
|
234 raise |
18638
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
235 except: # re-raises |
18709
9955fc5ee24b
worker: handle worker failures more aggressively
Bryan O'Sullivan <bryano@fb.com>
parents:
18708
diff
changeset
|
236 killworkers() |
18638
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
237 cleanup() |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
238 raise |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
239 cleanup() |
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
240 |
18707
d1a2b086d058
worker: on error, exit similarly to the first failing worker
Bryan O'Sullivan <bryano@fb.com>
parents:
18638
diff
changeset
|
241 def _posixexitstatus(code): |
d1a2b086d058
worker: on error, exit similarly to the first failing worker
Bryan O'Sullivan <bryano@fb.com>
parents:
18638
diff
changeset
|
242 '''convert a posix exit status into the same form returned by |
d1a2b086d058
worker: on error, exit similarly to the first failing worker
Bryan O'Sullivan <bryano@fb.com>
parents:
18638
diff
changeset
|
243 os.spawnv |
d1a2b086d058
worker: on error, exit similarly to the first failing worker
Bryan O'Sullivan <bryano@fb.com>
parents:
18638
diff
changeset
|
244 |
d1a2b086d058
worker: on error, exit similarly to the first failing worker
Bryan O'Sullivan <bryano@fb.com>
parents:
18638
diff
changeset
|
245 returns None if the process was stopped instead of exiting''' |
d1a2b086d058
worker: on error, exit similarly to the first failing worker
Bryan O'Sullivan <bryano@fb.com>
parents:
18638
diff
changeset
|
246 if os.WIFEXITED(code): |
d1a2b086d058
worker: on error, exit similarly to the first failing worker
Bryan O'Sullivan <bryano@fb.com>
parents:
18638
diff
changeset
|
247 return os.WEXITSTATUS(code) |
d1a2b086d058
worker: on error, exit similarly to the first failing worker
Bryan O'Sullivan <bryano@fb.com>
parents:
18638
diff
changeset
|
248 elif os.WIFSIGNALED(code): |
d1a2b086d058
worker: on error, exit similarly to the first failing worker
Bryan O'Sullivan <bryano@fb.com>
parents:
18638
diff
changeset
|
249 return -os.WTERMSIG(code) |
d1a2b086d058
worker: on error, exit similarly to the first failing worker
Bryan O'Sullivan <bryano@fb.com>
parents:
18638
diff
changeset
|
250 |
35427
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
251 def _windowsworker(ui, func, staticargs, args): |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
252 class Worker(threading.Thread): |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
253 def __init__(self, taskqueue, resultqueue, func, staticargs, |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
254 group=None, target=None, name=None, verbose=None): |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
255 threading.Thread.__init__(self, group=group, target=target, |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
256 name=name, verbose=verbose) |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
257 self._taskqueue = taskqueue |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
258 self._resultqueue = resultqueue |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
259 self._func = func |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
260 self._staticargs = staticargs |
35428
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
261 self._interrupted = False |
35432
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
262 self.daemon = True |
35428
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
263 self.exception = None |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
264 |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
265 def interrupt(self): |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
266 self._interrupted = True |
35427
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
267 |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
268 def run(self): |
35428
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
269 try: |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
270 while not self._taskqueue.empty(): |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
271 try: |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
272 args = self._taskqueue.get_nowait() |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
273 for res in self._func(*self._staticargs + (args,)): |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
274 self._resultqueue.put(res) |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
275 # threading doesn't provide a native way to |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
276 # interrupt execution. handle it manually at every |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
277 # iteration. |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
278 if self._interrupted: |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
279 return |
37844
8fb9985382be
pycompat: export queue module instead of symbols in module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36835
diff
changeset
|
280 except pycompat.queue.Empty: |
35428
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
281 break |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
282 except Exception as e: |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
283 # store the exception such that the main thread can resurface |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
284 # it as if the func was running without workers. |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
285 self.exception = e |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
286 raise |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
287 |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
288 threads = [] |
35432
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
289 def trykillworkers(): |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
290 # Allow up to 1 second to clean worker threads nicely |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
291 cleanupend = time.time() + 1 |
35428
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
292 for t in threads: |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
293 t.interrupt() |
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
294 for t in threads: |
35432
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
295 remainingtime = cleanupend - time.time() |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
296 t.join(remainingtime) |
35428
71427ff1dff8
workers: handling exceptions in windows workers
Wojciech Lis <wlis@fb.com>
parents:
35427
diff
changeset
|
297 if t.is_alive(): |
35432
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
298 # pass over the workers joining failure. it is more |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
299 # important to surface the inital exception than the |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
300 # fact that one of workers may be processing a large |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
301 # task and does not get to handle the interruption. |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
302 ui.warn(_("failed to kill worker threads while " |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
303 "handling an exception\n")) |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
304 return |
35427
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
305 |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
306 workers = _numworkers(ui) |
37844
8fb9985382be
pycompat: export queue module instead of symbols in module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36835
diff
changeset
|
307 resultqueue = pycompat.queue.Queue() |
8fb9985382be
pycompat: export queue module instead of symbols in module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36835
diff
changeset
|
308 taskqueue = pycompat.queue.Queue() |
35427
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
309 # partition work to more pieces than workers to minimize the chance |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
310 # of uneven distribution of large tasks between the workers |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
311 for pargs in partition(args, workers * 20): |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
312 taskqueue.put(pargs) |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
313 for _i in range(workers): |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
314 t = Worker(taskqueue, resultqueue, func, staticargs) |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
315 threads.append(t) |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
316 t.start() |
35432
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
317 try: |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
318 while len(threads) > 0: |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
319 while not resultqueue.empty(): |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
320 yield resultqueue.get() |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
321 threads[0].join(0.05) |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
322 finishedthreads = [_t for _t in threads if not _t.is_alive()] |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
323 for t in finishedthreads: |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
324 if t.exception is not None: |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
325 raise t.exception |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
326 threads.remove(t) |
35453
44fd4cfc6c0a
worker: handle interrupt on windows
Wojciech Lis <wlis@fb.com>
parents:
35432
diff
changeset
|
327 except (Exception, KeyboardInterrupt): # re-raises |
35432
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
328 trykillworkers() |
86b8cc1f244e
worker: make windows workers daemons
Wojciech Lis <wlis@fb.com>
parents:
35431
diff
changeset
|
329 raise |
35427
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
330 while not resultqueue.empty(): |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
331 yield resultqueue.get() |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
332 |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
333 if pycompat.iswindows: |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
334 _platformworker = _windowsworker |
02b36e860e0b
workers: implemented worker on windows
Wojciech Lis <wlis@fb.com>
parents:
34646
diff
changeset
|
335 else: |
18638
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
336 _platformworker = _posixworker |
18707
d1a2b086d058
worker: on error, exit similarly to the first failing worker
Bryan O'Sullivan <bryano@fb.com>
parents:
18638
diff
changeset
|
337 _exitstatus = _posixexitstatus |
18638
047110c0e2a8
worker: allow a function to be run in multiple worker processes
Bryan O'Sullivan <bryano@fb.com>
parents:
18637
diff
changeset
|
338 |
18637
ac4dbceeb14a
worker: partition a list (of tasks) into equal-sized chunks
Bryan O'Sullivan <bryano@fb.com>
parents:
18636
diff
changeset
|
339 def partition(lst, nslices): |
28181
f8efc8a3a991
worker: change partition strategy to every Nth element
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26587
diff
changeset
|
340 '''partition a list into N slices of roughly equal size |
f8efc8a3a991
worker: change partition strategy to every Nth element
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26587
diff
changeset
|
341 |
f8efc8a3a991
worker: change partition strategy to every Nth element
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26587
diff
changeset
|
342 The current strategy takes every Nth element from the input. If |
f8efc8a3a991
worker: change partition strategy to every Nth element
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26587
diff
changeset
|
343 we ever write workers that need to preserve grouping in input |
f8efc8a3a991
worker: change partition strategy to every Nth element
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26587
diff
changeset
|
344 we should consider allowing callers to specify a partition strategy. |
28292
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
345 |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
346 mpm is not a fan of this partitioning strategy when files are involved. |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
347 In his words: |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
348 |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
349 Single-threaded Mercurial makes a point of creating and visiting |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
350 files in a fixed order (alphabetical). When creating files in order, |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
351 a typical filesystem is likely to allocate them on nearby regions on |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
352 disk. Thus, when revisiting in the same order, locality is maximized |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
353 and various forms of OS and disk-level caching and read-ahead get a |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
354 chance to work. |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
355 |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
356 This effect can be quite significant on spinning disks. I discovered it |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
357 circa Mercurial v0.4 when revlogs were named by hashes of filenames. |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
358 Tarring a repo and copying it to another disk effectively randomized |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
359 the revlog ordering on disk by sorting the revlogs by hash and suddenly |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
360 performance of my kernel checkout benchmark dropped by ~10x because the |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
361 "working set" of sectors visited no longer fit in the drive's cache and |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
362 the workload switched from streaming to random I/O. |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
363 |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
364 What we should really be doing is have workers read filenames from a |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
365 ordered queue. This preserves locality and also keeps any worker from |
3eb7faf6d958
worker: document poor partitioning scheme impact
Gregory Szorc <gregory.szorc@gmail.com>
parents:
28181
diff
changeset
|
366 getting more than one file out of balance. |
28181
f8efc8a3a991
worker: change partition strategy to every Nth element
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26587
diff
changeset
|
367 ''' |
f8efc8a3a991
worker: change partition strategy to every Nth element
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26587
diff
changeset
|
368 for i in range(nslices): |
f8efc8a3a991
worker: change partition strategy to every Nth element
Gregory Szorc <gregory.szorc@gmail.com>
parents:
26587
diff
changeset
|
369 yield lst[i::nslices] |