rust-threads: force Rayon to respect the worker count in config
As per the inline comment, this is a workaround because Rust code does not yet
know how to read config files.
Differential Revision: https://phab.mercurial-scm.org/D7310
--- a/mercurial/dirstate.py Fri Oct 18 07:20:26 2019 +0100
+++ b/mercurial/dirstate.py Sun Nov 10 07:30:14 2019 -0800
@@ -1109,6 +1109,17 @@
use_rust = False
if use_rust:
+ # Force Rayon (Rust parallelism library) to respect the number of
+ # workers. This is a temporary workaround until Rust code knows
+ # how to read the config file.
+ numcpus = self._ui.configint("worker", "numcpus")
+ if numcpus is not None:
+ encoding.environ.setdefault(b'RAYON_NUM_THREADS', b'%d' % numcpus)
+
+ workers_enabled = self._ui.configbool("worker", "enabled", True)
+ if not workers_enabled:
+ encoding.environ[b"RAYON_NUM_THREADS"] = b"1"
+
(
lookup,
modified,