[compiler-rt] r309388 - Change INSTR_PROF_DEFAULT_NUM_VAL_PER_SITE from 8 to 16.

[Dehao Chen via llvm-commits]

Author: dehao
Date: Fri Jul 28 08:00:30 2017
New Revision: 309388

URL: http://llvm.org/viewvc/llvm-project?rev=309388&view=rev
Log:
Change INSTR_PROF_DEFAULT_NUM_VAL_PER_SITE from 8 to 16.

Summary: In the current implementation, the defaul number of values per site tracked by value profiler is 8, which is too small and could introduce inaccuracies to profile. Changing it to 16 will be able to gain more accurate value profiler.

Reviewers: davidxl, tejohnson

Reviewed By: tejohnson

Subscribers: sanjoy, llvm-commits

Differential Revision: https://reviews.llvm.org/D35964

Modified:
    compiler-rt/trunk/lib/profile/InstrProfilingValue.c

Modified: compiler-rt/trunk/lib/profile/InstrProfilingValue.c
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/profile/InstrProfilingValue.c?rev=309388&r1=309387&r2=309388&view=diff
==============================================================================
--- compiler-rt/trunk/lib/profile/InstrProfilingValue.c (original)
+++ compiler-rt/trunk/lib/profile/InstrProfilingValue.c Fri Jul 28 08:00:30 2017
@@ -22,7 +22,7 @@ static int hasStaticCounters = 1;
 static int OutOfNodesWarnings = 0;
 static int hasNonDefaultValsPerSite = 0;
 #define INSTR_PROF_MAX_VP_WARNS 10
-#define INSTR_PROF_DEFAULT_NUM_VAL_PER_SITE 8
+#define INSTR_PROF_DEFAULT_NUM_VAL_PER_SITE 16
 #define INSTR_PROF_VNODE_POOL_SIZE 1024
 
 #ifndef _MSC_VER