[PATCH] D45875: [zorg] Throttle down parallelism of AArch64 and AArch32 libcxx bots

[Maxim Kuvyrkov via Phabricator via llvm-commits]

maxim-kuvyrkov created this revision.
maxim-kuvyrkov added reviewers: gkistanova, rengolin.
Herald added a reviewer: EricWF.
Herald added subscribers: llvm-commits, kristof.beyls.

... to workaround timing assumptions in libcxx testsuites.
A number of locking tests assert that they get a lock under certain time
(50ms), which can fail under heavy load.  Throttling down parallelism
should fix that because each bot is guaranteed ~2 CPUs (out of 64),
which is plenty for single-threaded operation.


Repository:
  rL LLVM

https://reviews.llvm.org/D45875

Files:
  buildbot/osuosl/master/config/slaves.py


Index: buildbot/osuosl/master/config/slaves.py
===================================================================
--- buildbot/osuosl/master/config/slaves.py
+++ buildbot/osuosl/master/config/slaves.py
@@ -38,8 +38,10 @@
         create_slave("linaro-armv8-01-arm-global-isel", properties={'jobs' : 64}, max_builds=1),
         create_slave("linaro-armv8-01-arm-full", properties={'jobs' : 64}, max_builds=1),
         create_slave("linaro-armv8-01-arm-full-selfhost", properties={'jobs' : 64}, max_builds=1),
-        create_slave("linaro-armv8-01-arm-libcxx", properties={'jobs' : 64}, max_builds=1),
-        create_slave("linaro-armv8-01-arm-libcxx-noeh", properties={'jobs' : 64}, max_builds=1),
+        # Libcxx testsuite has tests with timing assumptions.  Run single-threaded to make
+        # sure we have plenty CPU cycle to satisfy timing assumptions.
+        create_slave("linaro-armv8-01-arm-libcxx", properties={'jobs' : 1}, max_builds=1),
+        create_slave("linaro-armv8-01-arm-libcxx-noeh", properties={'jobs' : 1}, max_builds=1),
 
         # AArch64 Linaro slaves
         create_slave("linaro-apm-01", properties={'jobs' : 8}, max_builds=1),
@@ -52,8 +54,10 @@
         create_slave("linaro-armv8-01-aarch64-full", properties={'jobs' : 64}, max_builds=1),
         create_slave("linaro-armv8-01-aarch64-global-isel", properties={'jobs' : 64}, max_builds=1),
         create_slave("linaro-armv8-01-aarch64-lld", properties={'jobs' : 64}, max_builds=1),
-        create_slave("linaro-armv8-01-aarch64-libcxx", properties={'jobs' : 64}, max_builds=1),
-        create_slave("linaro-armv8-01-aarch64-libcxx-noeh", properties={'jobs' : 64}, max_builds=1),
+        # Libcxx testsuite has tests with timing assumptions.  Run single-threaded to make
+        # sure we have plenty CPU cycle to satisfy timing assumptions.
+        create_slave("linaro-armv8-01-aarch64-libcxx", properties={'jobs' : 1}, max_builds=1),
+        create_slave("linaro-armv8-01-aarch64-libcxx-noeh", properties={'jobs' : 1}, max_builds=1),
 
         # AMD Athlon(tm) 64 X2 Dual Core 3800+, Ubuntu x86_64
         create_slave("grosser1", properties={'jobs': 2}, max_builds=1),


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