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Fix a bug of table_reader_bench

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Summary: Iterator benchmark case is timed incorrectly. Fix it

Test Plan: Run the benchmark

Reviewers: haobo, dhruba

Reviewed By: haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D13845
This commit is contained in:
Siying Dong 2013-10-31 15:26:06 -07:00
parent 7caadf2e52
commit 82b7e37f6e
1 changed files with 5 additions and 4 deletions
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9
table/table_reader_bench.cc
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@ -95,13 +95,13 @@ void TableReaderBenchmark(Options& opts, EnvOptions& env_options,
}
std::string start_key = MakeKey(r1, r2);
std::string end_key = MakeKey(r1, r2 + r2_len);
uint64_t first_part_time = 0;
uint64_t total_time = 0;
uint64_t start_micros = env->NowMicros();
Iterator* iter = table_reader->NewIterator(read_options);
int count = 0;
for(iter->Seek(start_key); iter->Valid(); iter->Next()) {
// verify key;
first_part_time = env->NowMicros() - start_micros;
total_time += env->NowMicros() - start_micros;
assert(Slice(MakeKey(r1, r2 + count)) == iter->key());
start_micros = env->NowMicros();
if (++count >= r2_len) {
@ -115,7 +115,8 @@ void TableReaderBenchmark(Options& opts, EnvOptions& env_options,
assert(false);
}
delete iter;
hist.Add(first_part_time + env->NowMicros() - start_micros);
total_time += env->NowMicros() - start_micros;
hist.Add(total_time);
}
}
}
@ -129,7 +130,7 @@ void TableReaderBenchmark(Options& opts, EnvOptions& env_options,
"num_key2: %5d %10s\n"
"==================================================="
"===================================================="
"\nHistogram (unit: nanoseconds): \n%s",
"\nHistogram (unit: microseconds): \n%s",
tf->Name(), num_keys1, num_keys2,
for_iterator? "iterator" : (if_query_empty_keys ? "empty" : "non_empty"),
hist.ToString().c_str());