* how to empty buffers/cache?
@ 2008-05-09 21:49 Soeren Sonnenburg
2008-05-09 22:11 ` Alejandro Riveira Fernández
0 siblings, 1 reply; 3+ messages in thread
From: Soeren Sonnenburg @ 2008-05-09 21:49 UTC (permalink / raw)
To: Linux Kernel
Dear all,
I am trying to perform some benchmarks that involve reading the same big
file a couple of times from disk. However I would want to make sure that
the file is not buffered/cached by the kernel when I read the file a
second/third/etc time.
Is there a way (except rebooting/unmounting the disk) to clear the
buffers?
Thanks,
Soeren
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: how to empty buffers/cache?
2008-05-09 21:49 how to empty buffers/cache? Soeren Sonnenburg
@ 2008-05-09 22:11 ` Alejandro Riveira Fernández
2008-05-13 16:58 ` Soeren Sonnenburg
0 siblings, 1 reply; 3+ messages in thread
From: Alejandro Riveira Fernández @ 2008-05-09 22:11 UTC (permalink / raw)
To: Soeren Sonnenburg; +Cc: Linux Kernel
El Fri, 09 May 2008 21:49:47 +0000
Soeren Sonnenburg <kernel@nn7.de> escribió:
> Dear all,
>
> I am trying to perform some benchmarks that involve reading the same big
> file a couple of times from disk. However I would want to make sure that
> the file is not buffered/cached by the kernel when I read the file a
> second/third/etc time.
>
> Is there a way (except rebooting/unmounting the disk) to clear the
> buffers?
echo 3 > /proc/sys/vm/drop_caches IIRC
>
> Thanks,
> Soeren
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: how to empty buffers/cache?
2008-05-09 22:11 ` Alejandro Riveira Fernández
@ 2008-05-13 16:58 ` Soeren Sonnenburg
0 siblings, 0 replies; 3+ messages in thread
From: Soeren Sonnenburg @ 2008-05-13 16:58 UTC (permalink / raw)
To: Alejandro Riveira Fernández, Carlos R. Mafra; +Cc: Linux Kernel
On Sat, 2008-05-10 at 00:11 +0200, Alejandro Riveira Fernández wrote:
> El Fri, 09 May 2008 21:49:47 +0000
> Soeren Sonnenburg <kernel@nn7.de> escribió:
>
> > Dear all,
> >
> > I am trying to perform some benchmarks that involve reading the same big
> > file a couple of times from disk. However I would want to make sure that
> > the file is not buffered/cached by the kernel when I read the file a
> > second/third/etc time.
> >
> > Is there a way (except rebooting/unmounting the disk) to clear the
> > buffers?
>
> echo 3 > /proc/sys/vm/drop_caches IIRC
thank you both very much ( echo 3 > ... is what I was looking for)
Soeren
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2008-05-13 16:59 UTC | newest]
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2008-05-09 21:49 how to empty buffers/cache? Soeren Sonnenburg
2008-05-09 22:11 ` Alejandro Riveira Fernández
2008-05-13 16:58 ` Soeren Sonnenburg
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