Re: huge improvement with per-device dirty throttling

2007-09-06 Thread Martin Knoblauch
--- Martin Knoblauch <[EMAIL PROTECTED]> wrote: > > --- Leroy van Logchem <[EMAIL PROTECTED]> wrote: > > > Andrea Arcangeli wrote: > > > On Wed, Aug 22, 2007 at 01:05:13PM +0200, Andi Kleen wrote: > > >> Ok perhaps the new adaptive dirty limits helps your single disk > > >> a lot too. But your

Re: huge improvement with per-device dirty throttling

2007-09-05 Thread Martin Knoblauch
--- Andrea Arcangeli <[EMAIL PROTECTED]> wrote: > On Wed, Aug 22, 2007 at 01:05:13PM +0200, Andi Kleen wrote: > > Ok perhaps the new adaptive dirty limits helps your single disk > > a lot too. But your improvements seem to be more "collateral > damage" @) > > > > But if that was true it might be

Re: huge improvement with per-device dirty throttling

2007-09-04 Thread Martin Knoblauch
--- Leroy van Logchem <[EMAIL PROTECTED]> wrote: > Andrea Arcangeli wrote: > > On Wed, Aug 22, 2007 at 01:05:13PM +0200, Andi Kleen wrote: > >> Ok perhaps the new adaptive dirty limits helps your single disk > >> a lot too. But your improvements seem to be more "collateral > damage" @) > >> > >>

Re: huge improvement with per-device dirty throttling

2007-09-04 Thread Leroy van Logchem
Andrea Arcangeli wrote: On Wed, Aug 22, 2007 at 01:05:13PM +0200, Andi Kleen wrote: Ok perhaps the new adaptive dirty limits helps your single disk a lot too. But your improvements seem to be more "collateral damage" @) But if that was true it might be enough to just change the dirty limits to

Re: huge improvement with per-device dirty throttling

2007-08-22 Thread Andrea Arcangeli
On Wed, Aug 22, 2007 at 01:05:13PM +0200, Andi Kleen wrote: > Ok perhaps the new adaptive dirty limits helps your single disk > a lot too. But your improvements seem to be more "collateral damage" @) > > But if that was true it might be enough to just change the dirty limits > to get the same effe

Re: huge improvement with per-device dirty throttling

2007-08-22 Thread Al Boldi
Jeffrey W. Baker wrote: > I tested 2.6.23-rc2-mm + Peter's per-BDI v9 patches, versus 2.6.20 as > shipped in Ubuntu 7.04. I realize there is a large delta between these > two kernels. > > I load the system with du -hs /bigtree, where bigtree has millions of > files, and dd if=/dev/zero of=bigfile

Re: huge improvement with per-device dirty throttling

2007-08-22 Thread Paolo Ornati
On 22 Aug 2007 13:05:13 +0200 Andi Kleen <[EMAIL PROTECTED]> wrote: > "Jeffrey W. Baker" <[EMAIL PROTECTED]> writes: > > > > My system is a Core 2 Duo, 2GB, single SATA disk. > > Hmm, I thought the patch was only supposed to make a real difference > if you have multiple devices? But you only g

Re: huge improvement with per-device dirty throttling

2007-08-22 Thread Andi Kleen
"Jeffrey W. Baker" <[EMAIL PROTECTED]> writes: > > My system is a Core 2 Duo, 2GB, single SATA disk. Hmm, I thought the patch was only supposed to make a real difference if you have multiple devices? But you only got a single disk. At least that was the case it was supposed to fix: starvatio