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* [Bug libitm/52526] New: libitm: stuck in futex_wait @ 2012-03-07 22:41 patrick.marlier at gmail dot com 2012-03-08 12:43 ` [Bug libitm/52526] " torvald at gcc dot gnu.org ` (5 more replies) 0 siblings, 6 replies; 7+ messages in thread From: patrick.marlier at gmail dot com @ 2012-03-07 22:41 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52526 Bug #: 52526 Summary: libitm: stuck in futex_wait Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libitm AssignedTo: unassigned@gcc.gnu.org ReportedBy: patrick.marlier@gmail.com CC: torvald@gcc.gnu.org Host: x86_64-unknown-linux-gnu Target: x86_64-unknown-linux-gnu libitm (default configuration/4.8.0 20120307) is stuck in futex_wait with STAMP kmeans with low contention and 8 threads. (gdb) info threads Id Target Id Frame 8 Thread 0x7ffff322b700 (LWP 24011) "kmeans" 0x0000003ecb40c14c in pthread_barrier_wait () from /lib64/libpthread.so.0 7 Thread 0x7ffff3a2c700 (LWP 24010) "kmeans" 0x0000003ecb40c14c in pthread_barrier_wait () from /lib64/libpthread.so.0 6 Thread 0x7ffff422d700 (LWP 24009) "kmeans" 0x0000003ecb40c14c in pthread_barrier_wait () from /lib64/libpthread.so.0 5 Thread 0x7ffff4a2e700 (LWP 24008) "kmeans" 0x0000003ecb40c14c in pthread_barrier_wait () from /lib64/libpthread.so.0 * 4 Thread 0x7ffff522f700 (LWP 24007) "kmeans" GTM::futex_wait (addr=0x7ffff7fdfbb8, val=1) at ../../../gcc-trunk/libitm/config/linux/futex.cc:49 3 Thread 0x7ffff5a30700 (LWP 24006) "kmeans" 0x0000003ecb40c14c in pthread_barrier_wait () from /lib64/libpthread.so.0 2 Thread 0x7ffff6231700 (LWP 24005) "kmeans" 0x0000003ecb40c14c in pthread_barrier_wait () from /lib64/libpthread.so.0 1 Thread 0x7ffff73aa720 (LWP 24002) "kmeans" 0x0000003ecb40c14c in pthread_barrier_wait () from /lib64/libpthread.so.0 (gdb) thread 5 [Switching to thread 5 (Thread 0x7ffff4a2e700 (LWP 24008))] #0 0x0000003ecb40c14c in pthread_barrier_wait () from /lib64/libpthread.so.0 (gdb) bt #0 0x0000003ecb40c14c in pthread_barrier_wait () from /lib64/libpthread.so.0 #1 0x0000000000403099 in threadWait () #2 0x0000003ecb407b41 in start_thread () from /lib64/libpthread.so.0 #3 0x0000003eca8df49d in clone () from /lib64/libc.so.6 (gdb) thread 4 [Switching to thread 4 (Thread 0x7ffff522f700 (LWP 24007))] #0 GTM::futex_wait (addr=0x7ffff7fdfbb8, val=1) at ../../../gcc-trunk/libitm/config/linux/futex.cc:49 49 if (__builtin_expect (res == -ENOSYS, 0)) (gdb) bt #0 GTM::futex_wait (addr=0x7ffff7fdfbb8, val=1) at ../../../gcc-trunk/libitm/config/linux/futex.cc:49 #1 0x00007ffff75cd1a4 in GTM::gtm_rwlock::read_lock (this=0x7ffff7fdfbb0, tx=0x7fffd40008c0) at ../../../gcc-trunk/libitm/config/linux/rwlock.cc:76 #2 0x00007ffff75ccbfa in GTM::gtm_thread::decide_begin_dispatch (this=0x7fffd40008c0, prop=<optimized out>) at ../../../gcc-trunk/libitm/retry.cc:182 #3 0x00007ffff75cc16b in GTM_begin_transaction (prop=41, jb=0x7ffff522edb0) at ../../../gcc-trunk/libitm/beginend.cc:235 #4 0x00007ffff75cd853 in _ITM_beginTransaction () at ../../../gcc-trunk/libitm/config/x86/sjlj.S:74 #5 0x00000000004021ab in work () #6 0x000000000040308d in threadWait () #7 0x0000003ecb407b41 in start_thread () from /lib64/libpthread.so.0 #8 0x0000003eca8df49d in clone () from /lib64/libc.so.6 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libitm/52526] libitm: stuck in futex_wait 2012-03-07 22:41 [Bug libitm/52526] New: libitm: stuck in futex_wait patrick.marlier at gmail dot com @ 2012-03-08 12:43 ` torvald at gcc dot gnu.org 2012-03-10 17:46 ` torvald at gcc dot gnu.org ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: torvald at gcc dot gnu.org @ 2012-03-08 12:43 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52526 torvald at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2012-03-08 AssignedTo|unassigned at gcc dot |torvald at gcc dot gnu.org |gnu.org | Ever Confirmed|0 |1 ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libitm/52526] libitm: stuck in futex_wait 2012-03-07 22:41 [Bug libitm/52526] New: libitm: stuck in futex_wait patrick.marlier at gmail dot com 2012-03-08 12:43 ` [Bug libitm/52526] " torvald at gcc dot gnu.org @ 2012-03-10 17:46 ` torvald at gcc dot gnu.org 2012-03-12 21:30 ` patrick.marlier at gmail dot com ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: torvald at gcc dot gnu.org @ 2012-03-10 17:46 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52526 --- Comment #1 from torvald at gcc dot gnu.org 2012-03-10 17:46:12 UTC --- Patrick, I posted a fix to gcc-patches. Please have a look if you can. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libitm/52526] libitm: stuck in futex_wait 2012-03-07 22:41 [Bug libitm/52526] New: libitm: stuck in futex_wait patrick.marlier at gmail dot com 2012-03-08 12:43 ` [Bug libitm/52526] " torvald at gcc dot gnu.org 2012-03-10 17:46 ` torvald at gcc dot gnu.org @ 2012-03-12 21:30 ` patrick.marlier at gmail dot com 2012-03-13 22:04 ` torvald at gcc dot gnu.org ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: patrick.marlier at gmail dot com @ 2012-03-12 21:30 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52526 --- Comment #2 from Patrick Marlier <patrick.marlier at gmail dot com> 2012-03-12 21:29:30 UTC --- Indeed, with your proposed patch, it fixes the problem. Thanks! ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libitm/52526] libitm: stuck in futex_wait 2012-03-07 22:41 [Bug libitm/52526] New: libitm: stuck in futex_wait patrick.marlier at gmail dot com ` (2 preceding siblings ...) 2012-03-12 21:30 ` patrick.marlier at gmail dot com @ 2012-03-13 22:04 ` torvald at gcc dot gnu.org 2012-03-13 22:13 ` torvald at gcc dot gnu.org 2012-03-13 22:14 ` torvald at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: torvald at gcc dot gnu.org @ 2012-03-13 22:04 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52526 --- Comment #3 from torvald at gcc dot gnu.org 2012-03-13 22:01:41 UTC --- Author: torvald Date: Tue Mar 13 22:01:34 2012 New Revision: 185358 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=185358 Log: libitm: Fix lost wake-up in serial lock. PR libitm/52526 * config/linux/rwlock.cc (GTM::gtm_rwlock::read_lock): Fix lost wake-up. Modified: trunk/libitm/ChangeLog trunk/libitm/config/linux/rwlock.cc ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libitm/52526] libitm: stuck in futex_wait 2012-03-07 22:41 [Bug libitm/52526] New: libitm: stuck in futex_wait patrick.marlier at gmail dot com ` (3 preceding siblings ...) 2012-03-13 22:04 ` torvald at gcc dot gnu.org @ 2012-03-13 22:13 ` torvald at gcc dot gnu.org 2012-03-13 22:14 ` torvald at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: torvald at gcc dot gnu.org @ 2012-03-13 22:13 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52526 --- Comment #4 from torvald at gcc dot gnu.org 2012-03-13 22:11:52 UTC --- Author: torvald Date: Tue Mar 13 22:11:46 2012 New Revision: 185360 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=185360 Log: libitm: Fix lost wake-up in serial lock. PR libitm/52526 Backported from mainline. * config/linux/rwlock.cc (GTM::gtm_rwlock::read_lock): Fix lost wake-up. Modified: branches/gcc-4_7-branch/libitm/ChangeLog branches/gcc-4_7-branch/libitm/config/linux/rwlock.cc ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libitm/52526] libitm: stuck in futex_wait 2012-03-07 22:41 [Bug libitm/52526] New: libitm: stuck in futex_wait patrick.marlier at gmail dot com ` (4 preceding siblings ...) 2012-03-13 22:13 ` torvald at gcc dot gnu.org @ 2012-03-13 22:14 ` torvald at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: torvald at gcc dot gnu.org @ 2012-03-13 22:14 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52526 torvald at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED --- Comment #5 from torvald at gcc dot gnu.org 2012-03-13 22:13:16 UTC --- Fixed in both trunk and 4.7. ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2012-03-13 22:13 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-03-07 22:41 [Bug libitm/52526] New: libitm: stuck in futex_wait patrick.marlier at gmail dot com 2012-03-08 12:43 ` [Bug libitm/52526] " torvald at gcc dot gnu.org 2012-03-10 17:46 ` torvald at gcc dot gnu.org 2012-03-12 21:30 ` patrick.marlier at gmail dot com 2012-03-13 22:04 ` torvald at gcc dot gnu.org 2012-03-13 22:13 ` torvald at gcc dot gnu.org 2012-03-13 22:14 ` torvald at gcc dot gnu.org
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