Mail Archives: cygwin/2005/05/29/15:38:02
Christopher Faylor wrote:
> On Sat, May 28, 2005 at 11:05:23PM -0400, Christopher Faylor wrote:
>
>>On Sat, May 28, 2005 at 08:18:46PM -0400, Christopher Faylor wrote:
>>
>>>I have an idea about how to work around this problem but I have to think
>>>about how dangerous it might be. Basically removing the signal handling
>>>wrapper around pthread_getspecific and pthread_setspecific. That may
>>>work ok but I have to think about worst case scenarios.
>>
>>I've semi-convinced myself that pthread_[gs]etspecific do not need signal
>>protection so I've released a snapshot which turns it off:
>>
>>http://cygwin.com/snapshots/
>>
>>This version is about 2.7 times faster than cygwin 1.5.17 but it is still
>>not as fast as mingw. I don't think we're going to hit mingw performance
>>since there are still cygwin overhead issues involved.
>>
>>AFAIK, this is only going to provide a speedup for this specific case.
>>I don't think a general cygwin user is going to notice any improvement.
>
>
> Gerrit, if you have a chance could you confirm or deny if this change has
> any effect for you?
I just changed the DLL, application is not recompiled:
Snapshot DLL:
$ C:\cygwin\bin\time cygspd.exe cygspd.dat
94.04user 0.61system 1:41.69elapsed 93%CPU
(0avgtext+0avgdata 10560maxresident)k
0inputs+0outputs (667major+0minor)pagefaults 0swaps
Release 1.5.17 DLL:
$ C:\cygwin\bin\time cygspd.exe cygspd.dat
264.50user 0.75system 4:48.08elapsed 92%CPU
(0avgtext+0avgdata 10560maxresident)k
0inputs+0outputs (667major+0minor)pagefaults 0swaps
It is about 2,8514851485148514851485148514851 times faster at my
workstation.
Gerrit
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