Public bug reported: Reported by upstream:
> Sage, > Here is the tcmalloc issue I was talking in the performance meeting. > > http://code.google.com/p/gperftools/issues/detail?id=585 > > The tcmalloc is consuming lot of cpus (and eventually slowing down the > performance) with the following perf top trace. > > 25.73% libtcmalloc.so.4.1.2 [.] tcmalloc::CentralFreeList::FetchFromSpans() > 12.52% libtcmalloc.so.4.1.2 [.] > tcmalloc::ThreadCache::ReleaseToCentralCache(tcmalloc::ThreadCache::FreeList*, > unsigned long, int) > 11.62% libtcmalloc.so.4.1.2 [.] > tcmalloc::CentralFreeList::ReleaseToSpans(void*) > 1.56% [kernel] [k] __copy_user_nocache > 1.44% libtcmalloc.so.4.1.2 [.] tcmalloc::CentralFreeList::RemoveRange(void*, > void*, int) > 1.39% libtcmalloc.so.4.1.2 [.] > tcmalloc::CentralFreeList::ReleaseListToSpans(void*) > 0.89% libtcmalloc.so.4.1.2 [.] operator new(unsigned long) > > > The TCMALLOC_MAX_TOTAL_THREAD_CACHE_BYTES is alleviating that but the env > variable setting for this is a noop in the binary we are having in Ubuntu > 14.04. It is fixed in gperftools-2.1.90 release. > See the following link. > > http://code.google.com/p/gperftools/ > > We can request Ubuntu guys to incorporate this version or the latest tcmalloc > version which is gperftools-2.4. > > It will be really helpful if you can push them to incorporate this in 14.04 > updates. > > Thanks & Regards > Somnath ** Affects: google-perftools (Ubuntu) Importance: High Status: Fix Released ** Affects: google-perftools (Ubuntu Trusty) Importance: High Status: Triaged ** Affects: google-perftools (Ubuntu Vivid) Importance: High Status: Fix Released ** Summary changed: - Performance regredation over time + tcmalloc performance degredation over time ** Also affects: google-perftools (Ubuntu Vivid) Importance: Undecided Status: New ** Also affects: google-perftools (Ubuntu Trusty) Importance: Undecided Status: New ** Changed in: google-perftools (Ubuntu Vivid) Status: New => Fix Released -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to google-perftools in Ubuntu. https://bugs.launchpad.net/bugs/1439277 Title: tcmalloc performance degredation over time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/google-perftools/+bug/1439277/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
