Cygwin slow on x64 systems
Mon Sep 6 11:32:00 GMT 2010
I applied your patch but I don't notice for any improvement in performance with
my test case (I still get only 7 lines/sec).
I tried it with several cygwin 1.7.7-1 revisions
Which version of cygwin sources do you use ?
Did you try it with the latest snapshot ?
Magnus Holmgren wrote:
>>>> I did some testing on my 64-bit Vista system, and it appears that
>>>> CreateThread is the main cause.
>>> To test this, I removed the call to sigproc_init in dll_crt0_0 and made sure
>>> it was always called in dll_crt0_1 instead. Suddenly the sigp thread started
>>> executing immediately, and its initialization was complete long before
>>> wait_for_sigthread was called.
>> Since you obviously have a patch, would you mind sharing it, rather than
>> just your conclusions from said patch?
> Not quite ready for commit as is, but here it is:
> Index: src/winsup/cygwin/dcrt0.cc
> RCS file: /cvs/src/src/winsup/cygwin/dcrt0.cc,v
> retrieving revision 1.382
> diff -r1.382 dcrt0.cc
> < if (!dynamically_loaded)
> < sigproc_init ();
>> //if (!dynamically_loaded)
>> //sigproc_init ();
> < if (dynamically_loaded)
>> //if (dynamically_loaded)
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