our case is always single threaded (it-is mapreduce-job).
22.01.2014 21:30, John Esmet пишет:
Hi Alexey, I have run into similar issues (exorbitantly long wait times for the malloc mutex). The only way I could reduce the pain was to either reduce the number of threads, or reduce the amount of malloc/free() done by the application. If you're using a library (like this xml one) it may be hard to reduce the number of malloc/frees() actually done. Can you try getting a full set of stack traces on the next stall (for all threads?). I have a feeling that your particular stack trace may be held up behind an arena_flush() but it'd be good to know for sure. On Tue, Jan 21, 2014 at 5:46 AM, Alexey Kuts <[email protected] <mailto:[email protected]>> wrote: Hi, sometimes (maybe once per day) we have an annoying hang in jemalloc(). jemalloc-version: 3.4.1-0-__g0135fb806e4137dc9cdf152541926__a2bc95e33f0 Ubuntu 12.04.3 LTS, 3.2.0-33-generic x86_64 GNU/Linux #0 0x00007f6bd681a89c in __lll_lock_wait () from /lib/x86_64-linux-gnu/__libpthread.so.0 #1 0x00007f6bd6816080 in _L_lock_903 () from /lib/x86_64-linux-gnu/__libpthread.so.0 #2 0x00007f6bd6815f19 in pthread_mutex_lock () from /lib/x86_64-linux-gnu/__libpthread.so.0 #3 0x0000000000459127 in malloc_mutex_lock (mutex=0x7f6bd4400a08) at include/jemalloc/internal/__mutex.h:77 #4 tcache_bin_flush_small (tbin=<optimized out>, binind=15, rem=3, tcache=0x7f6bd4006000) at src/tcache.c:105 #5 0x000000000045958d in tcache_event_hard (tcache=0x7f6bd4006000) at src/tcache.c:39 #6 0x0000000000437ebe in tcache_event (tcache=0x7f6bd4006000) at include/jemalloc/internal/__tcache.h:271 #7 tcache_alloc_large (size=<optimized out>, tcache=<optimized out>, zero=<optimized out>) at include/jemalloc/internal/__tcache.h:383 #8 arena_malloc (zero=false, size=<optimized out>, arena=0x0, try_tcache=true) at include/jemalloc/internal/__arena.h:944 #9 imallocx (arena=0x0, try_tcache=true, size=<optimized out>) at include/jemalloc/internal/__jemalloc_internal.h:798 #10 imalloc (size=<optimized out>) at include/jemalloc/internal/__jemalloc_internal.h:807 #11 jemalloc (size=<optimized out>) at src/jemalloc.c:887 #12 0x00007f6bd6d3bad8 in xmlStrndup () from /usr/lib/x86_64-linux-gnu/__libxml2.so.2 #13 0x00007f6bd6ce3029 in xmlNodeListGetString () from /usr/lib/x86_64-linux-gnu/__libxml2.so.2 #14 0x00007f6bd6d0038f in xmlValidateElement () from /usr/lib/x86_64-linux-gnu/__libxml2.so.2 #15 0x00007f6bd6d0034e in xmlValidateElement () from /usr/lib/x86_64-linux-gnu/__libxml2.so.2 #16 0x00007f6bd6d0034e in xmlValidateElement () from /usr/lib/x86_64-linux-gnu/__libxml2.so.2 #17 0x00007f6bd6d00528 in xmlValidateDtd () from /usr/lib/x86_64-linux-gnu/__libxml2.so.2 #18 0x00007f6bd7005355 in xmlpp::DtdValidator::validate(__xmlpp::Document const*) () from /usr/lib/libxml++-2.6.so.2 Will appreciate any hints or suggestions -- Kuts Alexey _________________________________________________ jemalloc-discuss mailing list [email protected] <mailto:[email protected]> http://www.canonware.com/__mailman/listinfo/jemalloc-__discuss <http://www.canonware.com/mailman/listinfo/jemalloc-discuss>
-- Куц Алексей http://staff.yandex-team.ru/akuts _______________________________________________ jemalloc-discuss mailing list [email protected] http://www.canonware.com/mailman/listinfo/jemalloc-discuss
