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use CAS when returning SuperVersion to ThreadLocal

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Summary:
Add a check at the end of GetImpl to release SuperVersion if it becomes
obsolete. Also do Scrape() inside InstallSuperVersion so it happens more
frequent.

Test Plan:
make all check
running asan_check now

Reviewers: igor, haobo, sdong, dhruba

Reviewed By: haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D16641
This commit is contained in:
Lei Jin
2014-03-07 14:43:22 -08:00
parent ebe2527f9a
commit e5fa4944fc
6 changed files with 112 additions and 25 deletions
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6
include/rocksdb/statistics.h
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@@ -122,7 +122,8 @@ enum Tickers {
// Number of table's properties loaded directly from file, without creating
// table reader object.
NUMBER_DIRECT_LOAD_TABLE_PROPERTIES,
NUMBER_SUPERVERSION_UPDATES,
NUMBER_SUPERVERSION_ACQUIRES,
NUMBER_SUPERVERSION_RELEASES,
TICKER_ENUM_MAX
};
@@ -178,7 +179,8 @@ const std::vector<std::pair<Tickers, std::string>> TickersNameMap = {
{COMPACT_WRITE_BYTES, "rocksdb.compact.write.bytes"},
{NUMBER_DIRECT_LOAD_TABLE_PROPERTIES,
"rocksdb.number.direct.load.table.properties"},
{NUMBER_SUPERVERSION_UPDATES, "rocksdb.number.superversion_updates"},
{NUMBER_SUPERVERSION_ACQUIRES, "rocksdb.number.superversion_acquires"},
{NUMBER_SUPERVERSION_RELEASES, "rocksdb.number.superversion_releases"},
};
/**