Mercurial > hg
annotate contrib/showstack.py @ 47024:8fcc0a829f3d
chg: pass --no-profile to disable profiling when starting hg serve
If profiling is enabled via global/user config (as far as I can tell, this
doesn't affect use of the --profile flag, but it probably does affect --config
profiling.enabled=1), then the profiling data can be *cumulative* for the
lifetime of the chg process.
This leads to some "interesting" results where hg claims the walltime is
something like 200s on a command that took only a second or two to run. Worse,
however, is that with at least some profilers (such as the default "stat"
profiler), this can cause a large slowdown while generating the profiler output.
Differential Revision: https://phab.mercurial-scm.org/D10470
author | Kyle Lippincott <spectral@google.com> |
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date | Fri, 16 Apr 2021 16:21:26 -0700 |
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1 # showstack.py - extension to dump a Python stack trace on signal |
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2 # |
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3 # binds to both SIGQUIT (Ctrl-\) and SIGINFO (Ctrl-T on BSDs) |
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4 r"""dump stack trace when receiving SIGQUIT (Ctrl-\) or SIGINFO (Ctrl-T on BSDs) |
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5 """ |
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6 |
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7 from __future__ import absolute_import, print_function |
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8 import signal |
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9 import sys |
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10 import traceback |
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11 |
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12 |
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13 def sigshow(*args): |
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14 sys.stderr.write("\n") |
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15 traceback.print_stack(args[1], limit=10, file=sys.stderr) |
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16 sys.stderr.write("----\n") |
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17 |
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18 |
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19 def sigexit(*args): |
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20 sigshow(*args) |
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21 print('alarm!') |
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22 sys.exit(1) |
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23 |
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24 |
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25 def extsetup(ui): |
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26 signal.signal(signal.SIGQUIT, sigshow) |
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27 signal.signal(signal.SIGALRM, sigexit) |
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28 try: |
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29 signal.signal(signal.SIGINFO, sigshow) |
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30 except AttributeError: |
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31 pass |