SERVER-14230: Reduce thread count on linux-32

Linux-32 machines are hitting mutex exhaustion often. Use a lower number
of thread (1/3 of the original number) to run the tests in 32-bit
versions to avoid mutex exhaustion.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/mongo/dbtests/threadedtests.cpp b/src/mongo/dbtests/threadedtests.cpp
index 564564164e0..3907ff3855e 100644
--- a/src/mongo/dbtests/threadedtests.cpp
+++ b/src/mongo/dbtests/threadedtests.cpp
@@ -37,6 +37,7 @@
 #include "mongo/db/d_concurrency.h"
 #include "mongo/dbtests/dbtests.h"
 #include "mongo/platform/atomic_word.h"
+#include "mongo/platform/bits.h"
 #include "mongo/stdx/functional.h"
 #include "mongo/util/concurrency/mvar.h"
 #include "mongo/util/concurrency/thread_pool.h"
@@ -81,8 +82,13 @@ namespace ThreadedTests {
         }
     };
 
+
+#ifdef MONGO_PLATFORM_32
+    // Avoid OOM on Linux-32 by using fewer threads
+    const int nthr=45;
+#else
     const int nthr=135;
-    //const int nthr=7;
+#endif
     class MongoMutexTest : public ThreadedTest<nthr> {
 #if defined(_DEBUG)
         enum { N = 2000 };