Robert Watson wrote:
So, are you suggesting that we should disable
machdep.hyperthreading_allowed with ULE in 7.x and current to avoid
confusion?
Possibly even without ULE.
I've verified - the tunable/sysctl works just fine with SCHED_4BSD in
7.1, so that I am not sure it's worth ripping it
On Mon, 23 Feb 2009, Maxim Sobolev wrote:
Unfortunately access to BIOS is not always an option and also some BIOSes
don't even provide a feature to turn HTT off.
It's not quite that simple -- in a world of device drivers pinning threads
to CPUs for workload distribution, callout threads and
Robert Watson wrote:
On Mon, 23 Feb 2009, Maxim Sobolev wrote:
Robert Watson wrote:
In the mean time, it sounds like the sysctl does need to be
reimplemented or removed, but one question is how far to take it --
caches are shared to varying degrees at varying levels of the
topology. Howeve
On Mon, 23 Feb 2009, Robert Watson wrote:
It's not quite that simple -- in a world of device drivers pinning threads to
CPUs for workload distribution, callout threads and sched_bind()/sched_pin()
for crypto load distribution, etc, you need a whole infrastructure for
software-disabled CPUs. D
On Mon, 23 Feb 2009, Maxim Sobolev wrote:
Robert Watson wrote:
In the mean time, it sounds like the sysctl does need to be reimplemented
or removed, but one question is how far to take it -- caches are shared to
varying degrees at varying levels of the topology. However, I believe the
recom
Robert Watson wrote:
In the mean time, it sounds like the sysctl does need to be
reimplemented or removed, but one question is how far to take it --
caches are shared to varying degrees at varying levels of the topology.
However, I believe the recommendation has generally moved to disabling
h
Robert Watson wrote:
On Sun, 22 Feb 2009, Maxim Sobolev wrote:
Hi Jeff,
I have a single-CPU system with P4 HTT-enabled processor
(7.1-RELEASE-p3), kernel compiled with SCHED_ULE.
This is because machdep.hlt_logical_cpus doesn't do what you think it
does. It causes HTT cores to invoke the
On Sun, 22 Feb 2009, Maxim Sobolev wrote:
Hi Jeff,
I have a single-CPU system with P4 HTT-enabled processor (7.1-RELEASE-p3),
kernel compiled with SCHED_ULE.
This is because machdep.hlt_logical_cpus doesn't do what you think it does.
It causes HTT cores to invoke the hlt instruction in the
Hi Jeff,
I have a single-CPU system with P4 HTT-enabled processor
(7.1-RELEASE-p3), kernel compiled with SCHED_ULE.
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