Hi
It looks like file write performance dropped somewhere between 2.5.60 and
2.5.70.
Doing
time dd if=/dev/zero of=file bs=4096 count=60000
on a box with Xeon(TM) CPU 2.40GHz and 1gb of RAM
I get for ext2
2.5.60: real 1.42 sys 0.77
2.5.70: real 1.73 sys 1.23
for reiserfs
2.5.60: real 1.62 sys 1.56
2.5.70: real 1.90 sys 1.86
Any ideas of what could cause this drop?
Thanks,
vs
On Wed, 2003-06-04 at 18:17, Vladimir Saveliev wrote:
> Hi
>
> It looks like file write performance dropped somewhere between 2.5.60 and
> 2.5.70.
> Doing
> time dd if=/dev/zero of=file bs=4096 count=60000
>
> on a box with Xeon(TM) CPU 2.40GHz and 1gb of RAM
> I get for ext2
> 2.5.60: real 1.42 sys 0.77
> 2.5.70: real 1.73 sys 1.23
> for reiserfs
> 2.5.60: real 1.62 sys 1.56
> 2.5.70: real 1.90 sys 1.86
>
> Any ideas of what could cause this drop?
What filesystem are you using?
Vladimir Saveliev <[email protected]> wrote:
>
> Hi
>
> It looks like file write performance dropped somewhere between 2.5.60 and
> 2.5.70.
> Doing
> time dd if=/dev/zero of=file bs=4096 count=60000
>
> on a box with Xeon(TM) CPU 2.40GHz and 1gb of RAM
> I get for ext2
> 2.5.60: real 1.42 sys 0.77
> 2.5.70: real 1.73 sys 1.23
> for reiserfs
> 2.5.60: real 1.62 sys 1.56
> 2.5.70: real 1.90 sys 1.86
>
> Any ideas of what could cause this drop?
>
hm, 2.5.60 was a long time ago. The best way to tell would be comparative
oprofiling.
On Wed, Jun 04, 2003 at 08:02:39PM +0200, Felipe Alfaro Solana wrote:
> On Wed, 2003-06-04 at 18:17, Vladimir Saveliev wrote:
> > Hi
> >
> > It looks like file write performance dropped somewhere between 2.5.60 and
> > 2.5.70.
> > Doing
> > time dd if=/dev/zero of=file bs=4096 count=60000
> >
> > on a box with Xeon(TM) CPU 2.40GHz and 1gb of RAM
> > I get for ext2
> > 2.5.60: real 1.42 sys 0.77
> > 2.5.70: real 1.73 sys 1.23
> > for reiserfs
> > 2.5.60: real 1.62 sys 1.56
> > 2.5.70: real 1.90 sys 1.86
> >
> > Any ideas of what could cause this drop?
>
> What filesystem are you using?
Good one.
ext2 and reiserfs.
Read the origional message again.
On Thu, 2003-06-05 at 20:37, Mike Fedyk wrote:
> On Wed, Jun 04, 2003 at 08:02:39PM +0200, Felipe Alfaro Solana wrote:
> > On Wed, 2003-06-04 at 18:17, Vladimir Saveliev wrote:
> > > Hi
> > >
> > > It looks like file write performance dropped somewhere between 2.5.60 and
> > > 2.5.70.
> > > Doing
> > > time dd if=/dev/zero of=file bs=4096 count=60000
> > >
> > > on a box with Xeon(TM) CPU 2.40GHz and 1gb of RAM
> > > I get for ext2
> > > 2.5.60: real 1.42 sys 0.77
> > > 2.5.70: real 1.73 sys 1.23
> > > for reiserfs
> > > 2.5.60: real 1.62 sys 1.56
> > > 2.5.70: real 1.90 sys 1.86
> > >
> > > Any ideas of what could cause this drop?
> >
> > What filesystem are you using?
>
> Good one.
>
> ext2 and reiserfs.
>
> Read the origional message again.
Hmmm... What filesystem was being used?
Arghh!!! I'm blind!!!!!!!
On Thu, Jun 05, 2003 at 09:24:15PM +0200, Felipe Alfaro Solana wrote:
[...]
> On Thu, 2003-06-05 at 20:37, Mike Fedyk wrote:
> > On Wed, Jun 04, 2003 at 08:02:39PM +0200, Felipe Alfaro Solana wrote:
> > > On Wed, 2003-06-04 at 18:17, Vladimir Saveliev wrote:
> > > > I get for ext2
> > > > 2.5.60: real 1.42 sys 0.77
> > > > 2.5.70: real 1.73 sys 1.23
> > > > for reiserfs
> > > > 2.5.60: real 1.62 sys 1.56
> > > > 2.5.70: real 1.90 sys 1.86
> Hmmm... What filesystem was being used?
> Arghh!!! I'm blind!!!!!!!
you should be going to sleep :-)
Ulisses
Debian GNU/Linux: a dream come true
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