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
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
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 8, 2013 at 2:31 PM, Rik van Riel r...@redhat.com wrote:
From: Eric Dumazet eric.duma...@gmail.com
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
On 01/10/2013 08:01 AM, Michel Lespinasse wrote:
On Tue, Jan 8, 2013 at 2:31 PM, Rik van Riel r...@redhat.com wrote:
From: Eric Dumazet eric.duma...@gmail.com
Eric Dumazet found a regression with the first version of the spinlock
backoff code, in a workload where multiple spinlocks were
On Thu, Jan 10, 2013 at 5:05 AM, Rik van Riel r...@redhat.com 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
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
On Tue, Jan 08, 2013 at 05:31:19PM -0500, Rik van Riel wrote:
From: Eric Dumazet eric.duma...@gmail.com
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
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
From: Eric Dumazet eric.duma...@gmail.com
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
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
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
On Wed, Jan 2, 2013 at 9:24 PM, Rik van Riel r...@redhat.com wrote:
From: Eric Dumazet eric.duma...@gmail.com
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
On Thu, 2013-01-03 at 04:48 -0800, Michel Lespinasse wrote:
On Wed, Jan 2, 2013 at 9:24 PM, Rik van Riel r...@redhat.com wrote:
From: Eric Dumazet eric.duma...@gmail.com
Eric Dumazet found a regression with the spinlock backoff code,
in workloads where multiple spinlocks were contended,
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
From: Eric Dumazet eric.duma...@gmail.com
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
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