> So, I made spinlocks "fair" by revision 5274. This means that no
> threads get *lost* on scheduling, if lock is requested.
>
> Please give this version a try.
I have tried it, thanks for the patch!
Unfortunately it appears that (ffmpeg + libx264 using it at least)
appears to deadlock (?) after a few seconds.
Here's an example trace:
Thanks for your help in this!
-roger-
[New Thread 5056.0xcc4]9.0 size= 0kB time=00:00:00.06 bitrate=
0.0kbits/s dup=3 drop=0
Program received signal SIGINT, Interrupt.
[Switching to Thread 5056.0xcc4]
0x767c6d67 in NlsUpdateSystemLocale () from C:\Windows\syswow64\kernel32.dll
(gdb) thread apply all bt
Thread 10 (Thread 5056.0xcc4):
#0 0x767c6d67 in NlsUpdateSystemLocale () from C:\Windows\syswow64\kernel32.dll
#1 0x7b21c13a in ?? ()
#2 0x00000000 in ?? ()
Thread 8 (Thread 5056.0xa6c):
#0 0x777d013d in ntdll!RtlEnableEarlyCriticalSectionEventCreation ()
from C:\Windows\system32\ntdll.dll
#1 0x777d013d in ntdll!RtlEnableEarlyCriticalSectionEventCreation ()
from C:\Windows\system32\ntdll.dll
#2 0x75640bdd in WaitForMultipleObjectsEx () from
C:\Windows\syswow64\KernelBase.dll
#3 0x00000002 in ?? ()
#4 0x07dffd28 in ?? ()
#5 0x76721a2c in KERNEL32!GetVolumePathNamesForVolumeNameA () from
C:\Windows\syswow64\kernel32.dll
#6 0x07dffd28 in ?? ()
#7 0x76724208 in KERNEL32!CheckForReadOnlyResource () from
C:\Windows\syswow64\kernel32.dll
#8 0x00000002 in ?? ()
#9 0x7efde000 in ?? ()
#10 0x00bb46c8 in do_sema_b_wait_intern (sema=0x1fc, nointerrupt=0,
timeout=4294967295) at src/cond.c:599
#11 0x00bb49dc in do_sema_b_wait (sema=0x1fc, nointerrupt=0,
timeout=4294967295, cs=0x6e267c4, val=0x6e267dc)
at src/cond.c:559
#12 do_sema_b_wait (sema=0x1fc, nointerrupt=0, timeout=4294967295,
cs=0x6e267c4, val=0x6e267dc)
at src/cond.c:549
#13 0x00bb4dfa in pthread_cond_wait (c=0x3cbdb64,
external_mutex=0x3cbdb68) at src/cond.c:448
#14 0x00827fa0 in worker (v=0x3cbf060) at libavcodec/pthread.c:216
#15 0x00bb62f8 in pthread_create_wrapper (args=0x6e26eb8) at src/thread.c:1378
#16 0x75571287 in msvcrt!_itow_s () from C:\Windows\syswow64\msvcrt.dll
#17 0x75571328 in msvcrt!_endthreadex () from C:\Windows\syswow64\msvcrt.dll
#18 0x7672339a in KERNEL32!BaseCleanupAppcompatCacheSupport () from
C:\Windows\syswow64\kernel32.dll
#19 0x06e26f90 in ?? ()
#20 0x777e9ef2 in ntdll!RtlpNtSetValueKey () from C:\Windows\system32\ntdll.dll
#21 0x06e26f90 in ?? ()
#22 0x777e9ec5 in ntdll!RtlpNtSetValueKey () from C:\Windows\system32\ntdll.dll
#23 0x755712e5 in msvcrt!_endthreadex () from C:\Windows\syswow64\msvcrt.dll
#24 0x00000000 in ?? ()
Thread 7 (Thread 5056.0x1638):
#0 0x777d013d in ntdll!RtlEnableEarlyCriticalSectionEventCreation ()
from C:\Windows\system32\ntdll.dll
#1 0x777d013d in ntdll!RtlEnableEarlyCriticalSectionEventCreation ()
from C:\Windows\system32\ntdll.dll
#2 0x75640bdd in WaitForMultipleObjectsEx () from
C:\Windows\syswow64\KernelBase.dll
#3 0x00000002 in ?? ()
#4 0x07bffd28 in ?? ()
#5 0x76721a2c in KERNEL32!GetVolumePathNamesForVolumeNameA () from
C:\Windows\syswow64\kernel32.dll
#6 0x07bffd28 in ?? ()
#7 0x76724208 in KERNEL32!CheckForReadOnlyResource () from
C:\Windows\syswow64\kernel32.dll
#8 0x00000002 in ?? ()
#9 0x7efde000 in ?? ()
#10 0x00bb46c8 in do_sema_b_wait_intern (sema=0x1fc, nointerrupt=0,
timeout=4294967295) at src/cond.c:599
#11 0x00bb49dc in do_sema_b_wait (sema=0x1fc, nointerrupt=0,
timeout=4294967295, cs=0x6e267c4, val=0x6e267dc)
at src/cond.c:559
#12 do_sema_b_wait (sema=0x1fc, nointerrupt=0, timeout=4294967295,
cs=0x6e267c4, val=0x6e267dc)
at src/cond.c:549
#13 0x00bb4dfa in pthread_cond_wait (c=0x3cbdb64,
external_mutex=0x3cbdb68) at src/cond.c:448
#14 0x00827fa0 in worker (v=0x3cbf060) at libavcodec/pthread.c:216
#15 0x00bb62f8 in pthread_create_wrapper (args=0x6e26bb0) at src/thread.c:1378
#16 0x75571287 in msvcrt!_itow_s () from C:\Windows\syswow64\msvcrt.dll
#17 0x75571328 in msvcrt!_endthreadex () from C:\Windows\syswow64\msvcrt.dll
#18 0x7672339a in KERNEL32!BaseCleanupAppcompatCacheSupport () from
C:\Windows\syswow64\kernel32.dll
#19 0x06e26c88 in ?? ()
#20 0x777e9ef2 in ntdll!RtlpNtSetValueKey () from C:\Windows\system32\ntdll.dll
#21 0x06e26c88 in ?? ()
#22 0x777e9ec5 in ntdll!RtlpNtSetValueKey () from C:\Windows\system32\ntdll.dll
#23 0x755712e5 in msvcrt!_endthreadex () from C:\Windows\syswow64\msvcrt.dll
#24 0x00000000 in ?? ()
Thread 6 (Thread 5056.0x16ac):
#0 0x777d013d in ntdll!RtlEnableEarlyCriticalSectionEventCreation ()
from C:\Windows\system32\ntdll.dll
#1 0x777d013d in ntdll!RtlEnableEarlyCriticalSectionEventCreation ()
from C:\Windows\system32\ntdll.dll
#2 0x75640bdd in WaitForMultipleObjectsEx () from
C:\Windows\syswow64\KernelBase.dll
#3 0x00000002 in ?? ()
#4 0x079ffd28 in ?? ()
#5 0x76721a2c in KERNEL32!GetVolumePathNamesForVolumeNameA () from
C:\Windows\syswow64\kernel32.dll
#6 0x079ffd28 in ?? ()
#7 0x76724208 in KERNEL32!CheckForReadOnlyResource () from
C:\Windows\syswow64\kernel32.dll
#8 0x00000002 in ?? ()
#9 0x7efde000 in ?? ()
#10 0x00bb46c8 in do_sema_b_wait_intern (sema=0x1fc, nointerrupt=0,
timeout=4294967295) at src/cond.c:599
#11 0x00bb49dc in do_sema_b_wait (sema=0x1fc, nointerrupt=0,
timeout=4294967295, cs=0x6e267c4, val=0x6e267dc)
at src/cond.c:559
#12 do_sema_b_wait (sema=0x1fc, nointerrupt=0, timeout=4294967295,
cs=0x6e267c4, val=0x6e267dc)
at src/cond.c:549
#13 0x00bb4dfa in pthread_cond_wait (c=0x3cbdb64,
external_mutex=0x3cbdb68) at src/cond.c:448
#14 0x00827fa0 in worker (v=0x3cbf060) at libavcodec/pthread.c:216
#15 0x00bb62f8 in pthread_create_wrapper (args=0x6e268a8) at src/thread.c:1378
#16 0x75571287 in msvcrt!_itow_s () from C:\Windows\syswow64\msvcrt.dll
#17 0x75571328 in msvcrt!_endthreadex () from C:\Windows\syswow64\msvcrt.dll
#18 0x7672339a in KERNEL32!BaseCleanupAppcompatCacheSupport () from
C:\Windows\syswow64\kernel32.dll
#19 0x06e26980 in ?? ()
#20 0x777e9ef2 in ntdll!RtlpNtSetValueKey () from C:\Windows\system32\ntdll.dll
#21 0x06e26980 in ?? ()
#22 0x777e9ec5 in ntdll!RtlpNtSetValueKey () from C:\Windows\system32\ntdll.dll
#23 0x755712e5 in msvcrt!_endthreadex () from C:\Windows\syswow64\msvcrt.dll
#24 0x00000000 in ?? ()
Thread 5 (Thread 5056.0x1824):
#0 0x777cfd71 in ntdll!RtlFindSetBits () from C:\Windows\system32\ntdll.dll
#1 0x756431bb in SleepEx () from C:\Windows\syswow64\KernelBase.dll
#2 0x00000000 in ?? ()
Thread 4 (Thread 5056.0x1734):
#0 0x777cfd71 in ntdll!RtlFindSetBits () from C:\Windows\system32\ntdll.dll
#1 0x756431bb in SleepEx () from C:\Windows\syswow64\KernelBase.dll
#2 0x00000000 in ?? ()
Thread 3 (Thread 5056.0x11b0):
#0 0x777cfd71 in ntdll!RtlFindSetBits () from C:\Windows\system32\ntdll.dll
#1 0x756431bb in SleepEx () from C:\Windows\syswow64\KernelBase.dll
#2 0x00000000 in ?? ()
Thread 2 (Thread 5056.0x9f4):
#0 0x777cfd71 in ntdll!RtlFindSetBits () from C:\Windows\system32\ntdll.dll
#1 0x756431bb in SleepEx () from C:\Windows\syswow64\KernelBase.dll
#2 0x00000000 in ?? ()
Thread 1 (Thread 5056.0x1650):
#0 0x777cfd71 in ntdll!RtlFindSetBits () from C:\Windows\system32\ntdll.dll
#1 0x756431bb in SleepEx () from C:\Windows\syswow64\KernelBase.dll
#2 0x00000000 in ?? ()
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