Commit Graph

6 Commits

Author SHA1 Message Date
matthewvon
678ba5e41c SyncPoint::Process thrashes heap ... fix it (#9023)
Summary:
The first parameter of SyncPoint::Process is "const std::string&".  The majority, maybe all, of the actual calls to this function use a "const char *".  The conversion before entering the function requires a construction of a std::string object on the heap.  This std::object is then typically not needed because first use of the string is a rocksdb::Slice which has a less costly conversion of char * to slice.

Example:

We have a load and iterate test.  The test loads 10m keys and iterates most via 10 rocksdb::Iterator objects.  We used TCMALLOC to gather information about allocation and space usage during iterators.

- Before this PR:  test took 32 min 17 sec
- After this PR:  test took 1 min 14 sec

The TCMALLOC top object list before this PR:

<pre>
Total: 5105999 objects
 5003717  98.0%  98.0%  5009471  98.1% rocksdb::DBIter::MergeValuesNewToOld (inline)
   20260   0.4%  98.4%    20260   0.4% std::__cxx11::basic_string::_M_mutate
   15214   0.3%  98.7%    15214   0.3% rocksdb::UncompressBlockContentsForCompressionType (inline)
   13408   0.3%  99.0%    13408   0.3% std::_Rb_tree::_M_emplace_hint_unique [clone .constprop.416] (inline)
   12957   0.3%  99.2%    12957   0.3% std::_Rb_tree::_M_emplace_hint_unique [clone .constprop.405] (inline)
    9327   0.2%  99.4%     9327   0.2% std::_Rb_tree::_M_copy (inline)
    7691   0.2%  99.5%     9919   0.2% JVM_FindSignal
    2859   0.1%  99.6%     2859   0.1% rocksdb::Cleanable::RegisterCleanup
    2844   0.1%  99.7%     2844   0.1% std::map::operator[] (inline)
</pre>

The "MergeValuesNewToOld (inline)" objects are the #define wrappers to SyncPoint::Process.  We discovered this in a 5.18 rocksdb release.  There TCMALLOC was more specific that std::basic_string was being constructed.  I believe that was before SyncPoint::Process was declared inline in subsequent releases.

The TCMALLOC top object list after this PR:

<pre>
Total: 104911 objects
   45090  43.0%  43.0%    45090  43.0% rocksdb::Cleanable::RegisterCleanup
   29995  28.6%  71.6%    29995  28.6% rocksdb::LRUCacheShard::Insert
   15229  14.5%  86.1%    15229  14.5% rocksdb::UncompressBlockContentsForCompressionType (inline)
    4373   4.2%  90.3%     4551   4.3% JVM_FindSignal
    2881   2.7%  93.0%     2881   2.7% rocksdb::::ReadBlockFromFile (inline)
    1162   1.1%  94.1%     1176   1.1% rocksdb::BlockFetcher::ReadBlockContents (inline)
    1036   1.0%  95.1%     1036   1.0% std::__cxx11::basic_string::_M_mutate
     869   0.8%  95.9%      869   0.8% std::vector::_M_realloc_insert (inline)
     806   0.8%  96.7%      806   0.8% SnmpAgent::GetVariables (inline)
</pre>

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9023

Reviewed By: pdillinger

Differential Revision: D31610907

Pulled By: mrambacher

fbshipit-source-id: 574ff51b639dd46ad253a8e664a575f06b7cc85d
2021-10-15 13:30:29 -07:00
sdong
cda7923169 Use bloom filter to speed up sync point (#8337)
Summary:
Now SyncPoint is used in crash test but can signiciantly slow down the run. Add a bloom filter before each process to speed itup

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8337

Test Plan: Run all existing tests

Reviewed By: ajkr

Differential Revision: D28730282

fbshipit-source-id: a187377a9d47877a36c5649e4b1f67d5e3033238
2021-05-27 13:14:29 -07:00
sdong
e19908cba6 Refactor kill point (#8241)
Summary:
Refactor kill point to one single class, rather than several extern variables. The intention was to drop unflushed data before killing to simulate some job, and I tried to a pointer to fault ingestion fs to the killing class, but it ended up with harder than I thought. Perhaps we'll need to do this in another way. But I thought the refactoring itself is good so I send it out.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/8241

Test Plan: make release and run crash test for a while.

Reviewed By: anand1976

Differential Revision: D28078486

fbshipit-source-id: f9182c1455f52e6851c13f88a21bade63bcec45f
2021-05-05 15:50:29 -07:00
Peter Dillinger
88b4210701 Remove racially charged terms "whitelist" and "blacklist" (#7008)
Summary:
We don't need them.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/7008

Test Plan: "make check" and ensure "make crash_test" starts

Reviewed By: ajkr

Differential Revision: D22143838

Pulled By: pdillinger

fbshipit-source-id: 72c8e16603abc59f4954e304466bc4dc1f58f94e
2020-06-19 15:27:32 -07:00
sdong
fdf882ded2 Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)
Summary:
When dynamically linking two binaries together, different builds of RocksDB from two sources might cause errors. To provide a tool for user to solve the problem, the RocksDB namespace is changed to a flag which can be overridden in build time.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6433

Test Plan: Build release, all and jtest. Try to build with ROCKSDB_NAMESPACE with another flag.

Differential Revision: D19977691

fbshipit-source-id: aa7f2d0972e1c31d75339ac48478f34f6cfcfb3e
2020-02-20 12:09:57 -08:00
Siying Dong
e9e0101ca4 Move test related files under util/ to test_util/ (#5377)
Summary:
There are too many types of files under util/. Some test related files don't belong to there or just are just loosely related. Mo
ve them to a new directory test_util/, so that util/ is cleaner.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5377

Differential Revision: D15551366

Pulled By: siying

fbshipit-source-id: 0f5c8653832354ef8caa31749c0143815d719e2c
2019-05-30 11:25:51 -07:00