R: Cygwin 1.7.7 fork/exec performance MUCH slower than 1.5.25
Marco Atzeri
marco_atzeri@yahoo.it
Fri Oct 1 07:16:00 GMT 2010
--- Ven 1/10/10, SZABÓ Gergely ha scritto:
> Ciao Marco,
>
> I do not think a real /home would help, as I have several
> colleagues who
> have a real /home, but still have similar slow performance
> with cygwin
> 1.7.x.
>
> What kind of ACL issue could this be? And why is it no
> problem for
> Cygwin 1.5.25? Anything to do with the new cyglsa.dll?
>
> The funny thing is, The sum of the sys and user times for
> the "fork"
> script is around 1 minute. What happens in the remaining 3
> minutes, to
> make up that terrible time over 4 min?
>
> If I am watching the Windows Task Manager during the
> execution of the
> "fork" script, I see that the process "System" eats more
> than 50% of the
> CPU all the time.
Antivirus ?
Some time on my system with McAfee, when I create a
huge number of files with cygwin the process "explorer.exe"
go to 50% (100% of 1 CPU)and I need to kill it.
I guess there is a timing problem between the antivirus
and cygwin-1.7.
>
> Best regards
> Gergely
>
> P.S: this is all Win32 (not x64) as you can see from the
> cygcheck
> files...
>
also here is Win32 XP SP2, and there is no difference in timing
Marco
PS: cygwin B15 and B20 ? How old is your PC :-?
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