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Print log message when we are throttling writes.

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Summary:
Added option --writes=xxx to specify the number of keys that we want to overwrite in the benchmark.

Task ID: #

Blame Rev:

Test Plan: Revert Plan:

Reviewers: adsharma

CC: sc

Differential Revision: https://reviews.facebook.net/D3465
This commit is contained in:
Dhruba Borthakur 2012-05-30 17:04:35 -07:00
parent f50ece60c7
commit 338939e5c1
2 changed files with 19 additions and 1 deletions
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19
db/db_bench.cc
View file

@ -116,6 +116,12 @@ static bool FLAGS_verify_checksum = false;
static bool FLAGS_statistics = false;
static class leveldb::DBStatistics* dbstats = NULL;
// Number of write operations to do. If negative, do FLAGS_num reads.
static long FLAGS_writes = -1;
// Sync all writes to disk
static bool FLAGS_sync = false;
extern bool useOsBuffer;
namespace leveldb {
@ -328,6 +334,7 @@ class Benchmark {
int entries_per_batch_;
WriteOptions write_options_;
long reads_;
long writes_;
int heap_counter_;
void PrintHeader() {
@ -427,6 +434,7 @@ class Benchmark {
value_size_(FLAGS_value_size),
entries_per_batch_(1),
reads_(FLAGS_reads < 0 ? FLAGS_num : FLAGS_reads),
writes_(FLAGS_writes < 0 ? FLAGS_num : FLAGS_writes),
heap_counter_(0) {
std::vector<std::string> files;
Env::Default()->GetChildren(FLAGS_db, &files);
@ -465,9 +473,13 @@ class Benchmark {
// Reset parameters that may be overriddden bwlow
num_ = FLAGS_num;
reads_ = (FLAGS_reads < 0 ? FLAGS_num : FLAGS_reads);
writes_ = (FLAGS_writes < 0 ? FLAGS_num : FLAGS_writes);
value_size_ = FLAGS_value_size;
entries_per_batch_ = 1;
write_options_ = WriteOptions();
if (FLAGS_sync) {
write_options_.sync = true;
}
void (Benchmark::*method)(ThreadState*) = NULL;
bool fresh_db = false;
@ -754,7 +766,7 @@ class Benchmark {
WriteBatch batch;
Status s;
int64_t bytes = 0;
for (int i = 0; i < num_; i += entries_per_batch_) {
for (int i = 0; i < writes_; i += entries_per_batch_) {
batch.Clear();
for (int j = 0; j < entries_per_batch_; j++) {
const int k = seq ? i+j : (thread->rand.Next() % FLAGS_num);
@ -1007,6 +1019,11 @@ int main(int argc, char** argv) {
dbstats = new leveldb::DBStatistics();
FLAGS_statistics = true;
}
} else if (sscanf(argv[i], "--writes=%d%c", &n, &junk) == 1) {
FLAGS_writes = n;
} else if (sscanf(argv[i], "--sync=%d%c", &n, &junk) == 1 &&
(n == 0 || n == 1)) {
FLAGS_sync = n;
} else {
fprintf(stderr, "Invalid flag '%s'\n", argv[i]);
exit(1);

1
db/db_impl.cc
View file

@ -1243,6 +1243,7 @@ Status DBImpl::MakeRoomForWrite(bool force) {
mutex_.Unlock();
env_->SleepForMicroseconds(1000);
allow_delay = false; // Do not delay a single write more than once
Log(options_.info_log, "delaying write...\n");
mutex_.Lock();
} else if (!force &&
(mem_->ApproximateMemoryUsage() <= options_.write_buffer_size)) {