On Thu, Jan 10, 2013 at 5:05 AM, Rik van Riel wrote:
> Eric,
>
> with just patches 1-3, can you still reproduce the
> regression on your system?
>
> In other words, could we get away with dropping the
> complexity of patch 4, or do we still need it?
To be clear, I must say that I'm not opposing p
On 01/10/2013 08:01 AM, Michel Lespinasse wrote:
On Tue, Jan 8, 2013 at 2:31 PM, Rik van Riel wrote:
From: Eric Dumazet
Eric Dumazet found a regression with the first version of the spinlock
backoff code, in a workload where multiple spinlocks were contended,
each having a different wait time
On Tue, Jan 8, 2013 at 2:31 PM, Rik van Riel wrote:
> From: Eric Dumazet
>
> Eric Dumazet found a regression with the first version of the spinlock
> backoff code, in a workload where multiple spinlocks were contended,
> each having a different wait time.
>
> This patch has multiple delay values
On Tue, Jan 08, 2013 at 05:31:19PM -0500, Rik van Riel wrote:
> From: Eric Dumazet
>
> Eric Dumazet found a regression with the first version of the spinlock
> backoff code, in a workload where multiple spinlocks were contended,
> each having a different wait time.
>
> This patch has multiple de
From: Eric Dumazet
Eric Dumazet found a regression with the first version of the spinlock
backoff code, in a workload where multiple spinlocks were contended,
each having a different wait time.
This patch has multiple delay values per cpu, indexed on a hash
of the lock address, to avoid that pro
On Thu, 2013-01-03 at 04:48 -0800, Michel Lespinasse wrote:
> On Wed, Jan 2, 2013 at 9:24 PM, Rik van Riel wrote:
> > From: Eric Dumazet
> >
> > Eric Dumazet found a regression with the spinlock backoff code,
> > in workloads where multiple spinlocks were contended, each having
> > a different wa
On Wed, Jan 2, 2013 at 9:24 PM, Rik van Riel wrote:
> From: Eric Dumazet
>
> Eric Dumazet found a regression with the spinlock backoff code,
> in workloads where multiple spinlocks were contended, each having
> a different wait time.
I think you should really clarify that the regression was obse
From: Eric Dumazet
Eric Dumazet found a regression with the spinlock backoff code,
in workloads where multiple spinlocks were contended, each having
a different wait time.
This patch has multiple delay values per cpu, indexed on a hash
of the lock address, to avoid that problem.
Eric Dumazet wr
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