D7610: rust-threads: force Rayon to respect the worker count in config

Alphare (Raphaël Gomès) phabricator at mercurial-scm.org
Fri Dec 13 13:17:49 EST 2019


Closed by commit rHG37cbf45bb858: rust-threads: force Rayon to respect the worker count in config (authored by Alphare).
This revision was automatically updated to reflect the committed changes.
This revision was not accepted when it landed; it landed in state "Needs Review".

REPOSITORY
  rHG Mercurial

CHANGES SINCE LAST UPDATE
  https://phab.mercurial-scm.org/D7610?vs=18640&id=18688

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D7610/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D7610

AFFECTED FILES
  mercurial/dirstate.py

CHANGE DETAILS

diff --git a/mercurial/dirstate.py b/mercurial/dirstate.py
--- a/mercurial/dirstate.py
+++ b/mercurial/dirstate.py
@@ -1116,6 +1116,17 @@
             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,



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Cc: mercurial-devel


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