[issue7946] Convoy effect with I/O bound threads and New GIL
Nir Aides
report at bugs.python.org
Tue Apr 27 01:22:54 CEST 2010
Nir Aides <nir at winpdb.org> added the comment:
Dave, there seems to be a bug in your patch on Windows XP. It crashes in ccbench.py with the following output:
>python_d.exe y:\ccbench.py
== CPython 3.2a0.0 (py3k) ==
== x86 Windows on 'x86 Family 6 Model 23 Stepping 10, GenuineIntel' ==
--- Throughput ---
Pi calculation (Python)
threads= 1: 840 iterations/s. balance
Fatal Python error: ReleaseMutex(mon_mutex) failed
threads= 2: 704 ( 83%) 0.8167
threads= 3: 840 (100%) 1.6706
threads= 4: 840 (100%) 2.0000
and the following stack trace:
ntdll.dll!7c90120e()
[Frames below may be incorrect and/or missing, no symbols loaded for ntdll.dll]
python32_d.dll!Py_FatalError(const char * msg) Line 2033 C
> python32_d.dll!gil_monitor(void * arg) Line 314 + 0x24 bytes C
python32_d.dll!bootstrap(void * call) Line 122 + 0x7 bytes C
msvcr100d.dll!_callthreadstartex() Line 314 + 0xf bytes C
msvcr100d.dll!_threadstartex(void * ptd) Line 297 C
kernel32.dll!7c80b729()
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<http://bugs.python.org/issue7946>
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