From 2fa5d41ba3a95c2210ee8debf1f84d8a4141e87d Mon Sep 17 00:00:00 2001
From: Haobo Xu <haobo@fb.com>
Date: Wed, 2 Apr 2014 22:59:48 -0700
Subject: [PATCH] [RocksDB] make SetPerfLevel affect only the current thread

Summary: as title, make it easy to turn on/off profiling at per thread level.

Test Plan: make check

Reviewers: sdong, ljin

Reviewed By: ljin

CC: leveldb

Differential Revision: https://reviews.facebook.net/D17469
---
 util/perf_context.cc    | 2 +-
 util/perf_context_imp.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/util/perf_context.cc b/util/perf_context.cc
index 650abebca..fc8efba64 100644
--- a/util/perf_context.cc
+++ b/util/perf_context.cc
@@ -10,7 +10,7 @@
 namespace rocksdb {
 
 // by default, enable counts only
-PerfLevel perf_level = kEnableCount;
+__thread PerfLevel perf_level = kEnableCount;
 
 void SetPerfLevel(PerfLevel level) { perf_level = level; }
 
diff --git a/util/perf_context_imp.h b/util/perf_context_imp.h
index f7818e69c..7b06e4c1d 100644
--- a/util/perf_context_imp.h
+++ b/util/perf_context_imp.h
@@ -9,7 +9,7 @@
 
 namespace rocksdb {
 
-extern enum PerfLevel perf_level;
+extern __thread PerfLevel perf_level;
 
 inline void StartPerfTimer(StopWatchNano* timer) {
   if (perf_level >= PerfLevel::kEnableTime) {