r266213 - [OrderFiles] Don't allow lit to run dtrace multithreaded

[Chris Bieneman via cfe-commits]

Author: cbieneman
Date: Wed Apr 13 12:12:56 2016
New Revision: 266213

URL: http://llvm.org/viewvc/llvm-project?rev=266213&view=rev
Log:
[OrderFiles] Don't allow lit to run dtrace multithreaded

Dtrace is implemented to try and minimize performance impact on the process being traced. This results in dtrace dropping samples if it is taking too many CPU resources. Multi-threading dtrace increases the sample drop rate dramatically.

Modified:
    cfe/trunk/utils/perf-training/CMakeLists.txt

Modified: cfe/trunk/utils/perf-training/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/utils/perf-training/CMakeLists.txt?rev=266213&r1=266212&r2=266213&view=diff
==============================================================================
--- cfe/trunk/utils/perf-training/CMakeLists.txt (original)
+++ cfe/trunk/utils/perf-training/CMakeLists.txt Wed Apr 13 12:12:56 2016
@@ -48,6 +48,7 @@ if(DTRACE)
 
   add_lit_testsuite(generate-dtrace-logs "Generating clang dtrace data"
     ${CMAKE_CURRENT_BINARY_DIR}/order-files/
+    ARGS -j 1
     DEPENDS clang clear-dtrace-logs
     )