rocksdb/db/perf_context.cc

#include "rocksdb/perf_context.h"


namespace leveldb {

void PerfContext::Reset() {
  user_key_comparison_count = 0;
}

__thread PerfContext perf_context;

}
Replace include/leveldb with include/rocksdb. Summary: Replace include/leveldb with include/rocksdb. Test Plan: make clean; make check make clean; make release Differential Revision: https://reviews.facebook.net/D12489 2013-08-23 17:38:13 +02:00			`#include "rocksdb/perf_context.h"`
[RocksDB] Expose thread local perf counter for low overhead, per call level performance statistics. Summary: As title. No locking/atomic is needed due to thread local. There is also no need to modify the existing client interface, in order to expose related counters. perf_context_test shows a simple example of retrieving the number of user key comparison done for each put and get call. More counters could be added later. Sample output ./perf_context_test 1000000 ==== Test PerfContextTest.KeyComparisonCount Inserting 1000000 key/value pairs ... total user key comparison get: 43446523 total user key comparison put: 8017877 max user key comparison get: 88939 avg user key comparison get:43 Basically, the current skiplist does well on average, but could perform poorly in extreme cases. Test Plan: run perf_context_test <total number of entries to put/get> Reviewers: dhruba Differential Revision: https://reviews.facebook.net/D12225 2013-08-13 08:59:04 +02:00

			`namespace leveldb {`

			`void PerfContext::Reset() {`
			`user_key_comparison_count = 0;`
			`}`

			`__thread PerfContext perf_context;`

			`}`