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Mellow","email":"richard.demellow@couchbase.com","username":"rdemellow","avatars":[{"url":"https://www.gravatar.com/avatar/35c97da872c07458f5e5bc4938b2489f.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/35c97da872c07458f5e5bc4938b2489f.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/35c97da872c07458f5e5bc4938b2489f.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/35c97da872c07458f5e5bc4938b2489f.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/24/113024/2","fetch":{"anonymous http":{"url":"https://review.couchbase.org/kv_engine","ref":"refs/changes/24/113024/2","commands":{"Branch":"git fetch https://review.couchbase.org/kv_engine refs/changes/24/113024/2 \u0026\u0026 git checkout -b change-113024 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/kv_engine refs/changes/24/113024/2 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/kv_engine refs/changes/24/113024/2 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/kv_engine refs/changes/24/113024/2 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/kv_engine refs/changes/24/113024/2","Reset To":"git fetch https://review.couchbase.org/kv_engine refs/changes/24/113024/2 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"edeaeb752eb7ff4220ac2ce168337ec883349ac6","subject":"MB-35429: Ack correct PassiveStream"}],"author":{"name":"Richard de Mellow","email":"richard.demellow@couchbase.com","date":"2019-08-07 11:06:08.000000000","tz":60},"committer":{"name":"Richard de Mellow","email":"richard.demellow@couchbase.com","date":"2019-08-07 15:53:11.000000000","tz":60},"subject":"MB-35413 Fix data race in Timings::get_or_create_timing_histogram","message":"MB-35413 Fix data race in Timings::get_or_create_timing_histogram\n\nFix data race in Timings::get_or_create_timing_histogram() to prevent\nthe data race were in one thread we might not observe correctly the\npointer to a given Hdr1sfMicroSecHistogram stored by the timings array.\nWhich could lead to the Hdr1sfMicroSecHistogram being allocated multiple\ntimes.\n\nWARNING: ThreadSanitizer: data race (pid\u003d1085)\n  Read of size 8 at 0x0000009bad18 by thread T7 (mutexes: write M2377):\n    #0 std::__uniq_ptr_impl\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e::_M_ptr() const /usr/local/include/c++/7.3.0/bits/unique_ptr.h:147 (memcached+0x0000004bf317)\n    #1 std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e::get() const /usr/local/include/c++/7.3.0/bits/unique_ptr.h:337 (memcached+0x0000004bf317)\n    #2 std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e::operator bool() const /usr/local/include/c++/7.3.0/bits/unique_ptr.h:351 (memcached+0x0000004bf317)\n    #3 bool std::operator\u003d\u003d\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e(std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e const\u0026, decltype(nullptr)) /usr/local/include/c++/7.3.0/bits/unique_ptr.h:690 (memcached+0x0000004bf317)\n    #4 Timings::get_or_create_timing_histogram(unsigned char) /home/couchbase/couchbase/kv_engine/daemon/timings.cc:146 (memcached+0x0000004bf317)\n    #5 Timings::collect(cb::mcbp::ClientOpcode, std::chrono::duration\u003clong, std::ratio\u003c1l, 1000000000l\u003e \u003e) /home/couchbase/couchbase/kv_engine/daemon/timings.cc:42 (memcached+0x0000004bf4aa)\n...\n\n  Previous write of size 8 at 0x0000009bad18 by thread T8 (mutexes: write M2371, write M2392):\n    #0 std::enable_if\u003cstd::__and_\u003cstd::__not_\u003cstd::__is_tuple_like\u003cHdr1sfMicroSecHistogram*\u003e \u003e, std::is_move_constructible\u003cHdr1sfMicroSecHistogram*\u003e, std::is_move_assignable\u003cHdr1sfMicroSecHistogram*\u003e \u003e::value, void\u003e::type std::swap\u003cHdr1sfMicroSecHistogram*\u003e(Hdr1sfMicroSecHistogram*\u0026, Hdr1sfMicroSecHistogram*\u0026) /usr/local/include/c++/7.3.0/bits/move.h:199 (memcached+0x0000004bf3cf)\n    #1 std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e::reset(Hdr1sfMicroSecHistogram*) /usr/local/include/c++/7.3.0/bits/unique_ptr.h:374 (memcached+0x0000004bf3cf)\n    #2 std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e::operator\u003d(std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e\u0026\u0026) /usr/local/include/c++/7.3.0/bits/unique_ptr.h:283 (memcached+0x0000004bf3cf)\n    #3 Timings::get_or_create_timing_histogram(unsigned char) /home/couchbase/couchbase/kv_engine/daemon/timings.cc:149 (memcached+0x0000004bf3cf)\n    #4 Timings::collect(cb::mcbp::ClientOpcode, std::chrono::duration\u003clong, std::ratio\u003c1l, 1000000000l\u003e \u003e) /home/couchbase/couchbase/kv_engine/daemon/timings.cc:42 (memcached+0x0000004bf4aa)\n...\n\nChange-Id: I34db63854a1909cbf43a9feb273a13dfa40f313d\n"},"parents_data":[{"branch_name":"refs/heads/master","commit_id":"edeaeb752eb7ff4220ac2ce168337ec883349ac6","is_merged_in_target_branch":true,"change_id":"If4adc3a6cb73ea3befaa23ad7bfd33bced0b7a65","change_number":112961,"patch_set_number":4,"change_status":"MERGED"}],"branch":"refs/heads/master"},"63f86c075f66bddfa92f4533c7d9c88e59ed8818":{"kind":"TRIVIAL_REBASE","_number":3,"created":"2019-08-08 08:05:12.000000000","uploader":{"_account_id":1004368,"name":"Richard de Mellow","email":"richard.demellow@couchbase.com","username":"rdemellow","avatars":[{"url":"https://www.gravatar.com/avatar/35c97da872c07458f5e5bc4938b2489f.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/35c97da872c07458f5e5bc4938b2489f.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/35c97da872c07458f5e5bc4938b2489f.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/35c97da872c07458f5e5bc4938b2489f.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/24/113024/3","fetch":{"anonymous http":{"url":"https://review.couchbase.org/kv_engine","ref":"refs/changes/24/113024/3","commands":{"Branch":"git fetch https://review.couchbase.org/kv_engine refs/changes/24/113024/3 \u0026\u0026 git checkout -b change-113024 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/kv_engine refs/changes/24/113024/3 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/kv_engine refs/changes/24/113024/3 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/kv_engine refs/changes/24/113024/3 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/kv_engine refs/changes/24/113024/3","Reset To":"git fetch https://review.couchbase.org/kv_engine refs/changes/24/113024/3 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"a6312a624dabe0a8ac2bd317f5f6a484ce542927","subject":"MB-35429: Move preparedSeqno check to ActiveStream::seqnoAck"}],"author":{"name":"Richard de Mellow","email":"richard.demellow@couchbase.com","date":"2019-08-07 11:06:08.000000000","tz":60},"committer":{"name":"Richard de Mellow","email":"richard.demellow@couchbase.com","date":"2019-08-08 08:05:12.000000000","tz":0},"subject":"MB-35413 Fix data race in Timings::get_or_create_timing_histogram","message":"MB-35413 Fix data race in Timings::get_or_create_timing_histogram\n\nFix data race in Timings::get_or_create_timing_histogram() to prevent\nthe data race were in one thread we might not observe correctly the\npointer to a given Hdr1sfMicroSecHistogram stored by the timings array.\nWhich could lead to the Hdr1sfMicroSecHistogram being allocated multiple\ntimes.\n\nWARNING: ThreadSanitizer: data race (pid\u003d1085)\n  Read of size 8 at 0x0000009bad18 by thread T7 (mutexes: write M2377):\n    #0 std::__uniq_ptr_impl\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e::_M_ptr() const /usr/local/include/c++/7.3.0/bits/unique_ptr.h:147 (memcached+0x0000004bf317)\n    #1 std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e::get() const /usr/local/include/c++/7.3.0/bits/unique_ptr.h:337 (memcached+0x0000004bf317)\n    #2 std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e::operator bool() const /usr/local/include/c++/7.3.0/bits/unique_ptr.h:351 (memcached+0x0000004bf317)\n    #3 bool std::operator\u003d\u003d\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e(std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e const\u0026, decltype(nullptr)) /usr/local/include/c++/7.3.0/bits/unique_ptr.h:690 (memcached+0x0000004bf317)\n    #4 Timings::get_or_create_timing_histogram(unsigned char) /home/couchbase/couchbase/kv_engine/daemon/timings.cc:146 (memcached+0x0000004bf317)\n    #5 Timings::collect(cb::mcbp::ClientOpcode, std::chrono::duration\u003clong, std::ratio\u003c1l, 1000000000l\u003e \u003e) /home/couchbase/couchbase/kv_engine/daemon/timings.cc:42 (memcached+0x0000004bf4aa)\n...\n\n  Previous write of size 8 at 0x0000009bad18 by thread T8 (mutexes: write M2371, write M2392):\n    #0 std::enable_if\u003cstd::__and_\u003cstd::__not_\u003cstd::__is_tuple_like\u003cHdr1sfMicroSecHistogram*\u003e \u003e, std::is_move_constructible\u003cHdr1sfMicroSecHistogram*\u003e, std::is_move_assignable\u003cHdr1sfMicroSecHistogram*\u003e \u003e::value, void\u003e::type std::swap\u003cHdr1sfMicroSecHistogram*\u003e(Hdr1sfMicroSecHistogram*\u0026, Hdr1sfMicroSecHistogram*\u0026) /usr/local/include/c++/7.3.0/bits/move.h:199 (memcached+0x0000004bf3cf)\n    #1 std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e::reset(Hdr1sfMicroSecHistogram*) /usr/local/include/c++/7.3.0/bits/unique_ptr.h:374 (memcached+0x0000004bf3cf)\n    #2 std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e::operator\u003d(std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e\u0026\u0026) /usr/local/include/c++/7.3.0/bits/unique_ptr.h:283 (memcached+0x0000004bf3cf)\n    #3 Timings::get_or_create_timing_histogram(unsigned char) /home/couchbase/couchbase/kv_engine/daemon/timings.cc:149 (memcached+0x0000004bf3cf)\n    #4 Timings::collect(cb::mcbp::ClientOpcode, std::chrono::duration\u003clong, std::ratio\u003c1l, 1000000000l\u003e \u003e) /home/couchbase/couchbase/kv_engine/daemon/timings.cc:42 (memcached+0x0000004bf4aa)\n...\n\nChange-Id: I34db63854a1909cbf43a9feb273a13dfa40f313d\n"},"parents_data":[{"branch_name":"refs/heads/master","commit_id":"a6312a624dabe0a8ac2bd317f5f6a484ce542927","is_merged_in_target_branch":true,"change_id":"Iac72210a4bca390ea19013c7d43a8082fbb44a5d","change_number":112971,"patch_set_number":5,"change_status":"MERGED"}],"branch":"refs/heads/master","description":"Rebase"},"d4cb889cd6aa7b5970936148c65786d74e88dd43":{"kind":"REWORK","_number":4,"created":"2019-08-08 10:06:24.000000000","uploader":{"_account_id":1000966,"name":"Dave Rigby","email":"daver@couchbase.com","username":"drigby","avatars":[{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d32","height":32},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d56","height":56},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d100","height":100},{"url":"https://www.gravatar.com/avatar/514e75a8d75cc1fcdb22433d445ae8f1.jpg?d\u003didenticon\u0026r\u003dpg\u0026s\u003d120","height":120}]},"ref":"refs/changes/24/113024/4","fetch":{"anonymous http":{"url":"https://review.couchbase.org/kv_engine","ref":"refs/changes/24/113024/4","commands":{"Branch":"git fetch https://review.couchbase.org/kv_engine refs/changes/24/113024/4 \u0026\u0026 git checkout -b change-113024 FETCH_HEAD","Checkout":"git fetch https://review.couchbase.org/kv_engine refs/changes/24/113024/4 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.couchbase.org/kv_engine refs/changes/24/113024/4 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.couchbase.org/kv_engine refs/changes/24/113024/4 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.couchbase.org/kv_engine refs/changes/24/113024/4","Reset To":"git fetch https://review.couchbase.org/kv_engine refs/changes/24/113024/4 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"5c6b3ba1d847f8ed12213ec668db3780f477d860","subject":"MB-35133: Move SyncWrite warmup to EPBucket"}],"author":{"name":"Richard de Mellow","email":"richard.demellow@couchbase.com","date":"2019-08-07 11:06:08.000000000","tz":60},"committer":{"name":"Dave Rigby","email":"daver@couchbase.com","date":"2019-08-08 10:06:24.000000000","tz":0},"subject":"MB-35413 Fix data race in Timings::get_or_create_timing_histogram","message":"MB-35413 Fix data race in Timings::get_or_create_timing_histogram\n\nFix data race in Timings::get_or_create_timing_histogram() to prevent\nthe data race were in one thread we might not observe correctly the\npointer to a given Hdr1sfMicroSecHistogram stored by the timings array.\nWhich could lead to the Hdr1sfMicroSecHistogram being allocated multiple\ntimes.\n\nWARNING: ThreadSanitizer: data race (pid\u003d1085)\n  Read of size 8 at 0x0000009bad18 by thread T7 (mutexes: write M2377):\n    #0 std::__uniq_ptr_impl\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e::_M_ptr() const /usr/local/include/c++/7.3.0/bits/unique_ptr.h:147 (memcached+0x0000004bf317)\n    #1 std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e::get() const /usr/local/include/c++/7.3.0/bits/unique_ptr.h:337 (memcached+0x0000004bf317)\n    #2 std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e::operator bool() const /usr/local/include/c++/7.3.0/bits/unique_ptr.h:351 (memcached+0x0000004bf317)\n    #3 bool std::operator\u003d\u003d\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e(std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e const\u0026, decltype(nullptr)) /usr/local/include/c++/7.3.0/bits/unique_ptr.h:690 (memcached+0x0000004bf317)\n    #4 Timings::get_or_create_timing_histogram(unsigned char) /home/couchbase/couchbase/kv_engine/daemon/timings.cc:146 (memcached+0x0000004bf317)\n    #5 Timings::collect(cb::mcbp::ClientOpcode, std::chrono::duration\u003clong, std::ratio\u003c1l, 1000000000l\u003e \u003e) /home/couchbase/couchbase/kv_engine/daemon/timings.cc:42 (memcached+0x0000004bf4aa)\n...\n\n  Previous write of size 8 at 0x0000009bad18 by thread T8 (mutexes: write M2371, write M2392):\n    #0 std::enable_if\u003cstd::__and_\u003cstd::__not_\u003cstd::__is_tuple_like\u003cHdr1sfMicroSecHistogram*\u003e \u003e, std::is_move_constructible\u003cHdr1sfMicroSecHistogram*\u003e, std::is_move_assignable\u003cHdr1sfMicroSecHistogram*\u003e \u003e::value, void\u003e::type std::swap\u003cHdr1sfMicroSecHistogram*\u003e(Hdr1sfMicroSecHistogram*\u0026, Hdr1sfMicroSecHistogram*\u0026) /usr/local/include/c++/7.3.0/bits/move.h:199 (memcached+0x0000004bf3cf)\n    #1 std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e::reset(Hdr1sfMicroSecHistogram*) /usr/local/include/c++/7.3.0/bits/unique_ptr.h:374 (memcached+0x0000004bf3cf)\n    #2 std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e::operator\u003d(std::unique_ptr\u003cHdr1sfMicroSecHistogram, std::default_delete\u003cHdr1sfMicroSecHistogram\u003e \u003e\u0026\u0026) /usr/local/include/c++/7.3.0/bits/unique_ptr.h:283 (memcached+0x0000004bf3cf)\n    #3 Timings::get_or_create_timing_histogram(unsigned char) /home/couchbase/couchbase/kv_engine/daemon/timings.cc:149 (memcached+0x0000004bf3cf)\n    #4 Timings::collect(cb::mcbp::ClientOpcode, std::chrono::duration\u003clong, std::ratio\u003c1l, 1000000000l\u003e \u003e) /home/couchbase/couchbase/kv_engine/daemon/timings.cc:42 (memcached+0x0000004bf4aa)\n...\n\nChange-Id: I34db63854a1909cbf43a9feb273a13dfa40f313d\nReviewed-on: http://review.couchbase.org/113024\nReviewed-by: James Harrison \u003cjames.harrison@couchbase.com\u003e\nTested-by: Build Bot \u003cbuild@couchbase.com\u003e\nReviewed-by: Dave Rigby \u003cdaver@couchbase.com\u003e\n"},"parents_data":[{"branch_name":"refs/heads/master","commit_id":"5c6b3ba1d847f8ed12213ec668db3780f477d860","is_merged_in_target_branch":true,"change_id":"I89b66fe36ace1d873a26fd92a840bdcfdef00be4","change_number":113025,"patch_set_number":5,"change_status":"MERGED"}],"branch":"refs/heads/master"}},"requirements":[],"submit_records":[],"submit_requirements":[]}