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* file write performance drop between 2.5.60 and 2.5.70
@ 2003-06-04 16:17 Vladimir Saveliev
  2003-06-04 18:02 ` Felipe Alfaro Solana
  2003-06-05  1:52 ` Andrew Morton
  0 siblings, 2 replies; 6+ messages in thread
From: Vladimir Saveliev @ 2003-06-04 16:17 UTC (permalink / raw)
  To: linux-kernel; +Cc: reiserfs-dev

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



^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: file write performance drop between 2.5.60 and 2.5.70
  2003-06-04 16:17 file write performance drop between 2.5.60 and 2.5.70 Vladimir Saveliev
@ 2003-06-04 18:02 ` Felipe Alfaro Solana
  2003-06-05 18:37   ` Mike Fedyk
  2003-06-05  1:52 ` Andrew Morton
  1 sibling, 1 reply; 6+ messages in thread
From: Felipe Alfaro Solana @ 2003-06-04 18:02 UTC (permalink / raw)
  To: Vladimir Saveliev; +Cc: LKML, reiserfs-dev

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?


^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: file write performance drop between 2.5.60 and 2.5.70
  2003-06-04 16:17 file write performance drop between 2.5.60 and 2.5.70 Vladimir Saveliev
  2003-06-04 18:02 ` Felipe Alfaro Solana
@ 2003-06-05  1:52 ` Andrew Morton
  1 sibling, 0 replies; 6+ messages in thread
From: Andrew Morton @ 2003-06-05  1:52 UTC (permalink / raw)
  To: Vladimir Saveliev; +Cc: linux-kernel, reiserfs-dev

Vladimir Saveliev <vs@namesys.com> 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.


^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: file write performance drop between 2.5.60 and 2.5.70
  2003-06-04 18:02 ` Felipe Alfaro Solana
@ 2003-06-05 18:37   ` Mike Fedyk
  2003-06-05 19:24     ` Felipe Alfaro Solana
  0 siblings, 1 reply; 6+ messages in thread
From: Mike Fedyk @ 2003-06-05 18:37 UTC (permalink / raw)
  To: Felipe Alfaro Solana; +Cc: Vladimir Saveliev, LKML, reiserfs-dev

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.

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: file write performance drop between 2.5.60 and 2.5.70
  2003-06-05 18:37   ` Mike Fedyk
@ 2003-06-05 19:24     ` Felipe Alfaro Solana
  2003-06-05 19:27       ` OFFTOPIC: " uaca
  0 siblings, 1 reply; 6+ messages in thread
From: Felipe Alfaro Solana @ 2003-06-05 19:24 UTC (permalink / raw)
  To: LKML

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!!!!!!!


^ permalink raw reply	[flat|nested] 6+ messages in thread

* OFFTOPIC: Re: file write performance drop between 2.5.60 and 2.5.70
  2003-06-05 19:24     ` Felipe Alfaro Solana
@ 2003-06-05 19:27       ` uaca
  0 siblings, 0 replies; 6+ messages in thread
From: uaca @ 2003-06-05 19:27 UTC (permalink / raw)
  To: linux-kernel

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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^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2003-06-05 19:14 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2003-06-04 16:17 file write performance drop between 2.5.60 and 2.5.70 Vladimir Saveliev
2003-06-04 18:02 ` Felipe Alfaro Solana
2003-06-05 18:37   ` Mike Fedyk
2003-06-05 19:24     ` Felipe Alfaro Solana
2003-06-05 19:27       ` OFFTOPIC: " uaca
2003-06-05  1:52 ` Andrew Morton

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