On Wed, Nov 21, 2018 at 09:51:19PM +0100, Jiri Kosina wrote:
> On Wed, 21 Nov 2018, Tim Chen wrote:
>
> > Commit 53c613fe "x86/speculation: Enable cross-hyperthread spectre v2 STIBP
> > mitigation"
> > turns on STIBP all the time.
> >
> > This causes large performance regression in many
On Wed, Nov 21, 2018 at 09:51:19PM +0100, Jiri Kosina wrote:
> On Wed, 21 Nov 2018, Tim Chen wrote:
>
> > Commit 53c613fe "x86/speculation: Enable cross-hyperthread spectre v2 STIBP
> > mitigation"
> > turns on STIBP all the time.
> >
> > This causes large performance regression in many
On Wed, Nov 21, 2018 at 12:51 PM Jiri Kosina wrote:
>
> For -rc, I don't think we need to do this at this moment, given the
> prctl+seccomp fixup is basically ready, do we?
Agreed.
Linus
On Wed, Nov 21, 2018 at 12:51 PM Jiri Kosina wrote:
>
> For -rc, I don't think we need to do this at this moment, given the
> prctl+seccomp fixup is basically ready, do we?
Agreed.
Linus
On Wed, 21 Nov 2018, Tim Chen wrote:
> Commit 53c613fe "x86/speculation: Enable cross-hyperthread spectre v2 STIBP
> mitigation"
> turns on STIBP all the time.
>
> This causes large performance regression in many workloads.
>
> One case is perlbench in the SpecInt Rate 2006 test suite which
On Wed, 21 Nov 2018, Tim Chen wrote:
> Commit 53c613fe "x86/speculation: Enable cross-hyperthread spectre v2 STIBP
> mitigation"
> turns on STIBP all the time.
>
> This causes large performance regression in many workloads.
>
> One case is perlbench in the SpecInt Rate 2006 test suite which
Commit 53c613fe "x86/speculation: Enable cross-hyperthread spectre v2 STIBP
mitigation"
turns on STIBP all the time.
This causes large performance regression in many workloads.
One case is perlbench in the SpecInt Rate 2006 test suite which shows a
21% reduction in throughput.
There're also
Commit 53c613fe "x86/speculation: Enable cross-hyperthread spectre v2 STIBP
mitigation"
turns on STIBP all the time.
This causes large performance regression in many workloads.
One case is perlbench in the SpecInt Rate 2006 test suite which shows a
21% reduction in throughput.
There're also
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