Hi Peter,
yes, initially I have reported the issue to occur on Intel E5v3 CPU
(that CPU does not have CoD) but it has turned to be a fluctuation of
results. After repeating the test 10 times it has turned out that
Intel E5v3 CPU is not affected. I'm sorry for that.
I have then rerun the test on
Hi Peter,
yes, initially I have reported the issue to occur on Intel E5v3 CPU
(that CPU does not have CoD) but it has turned to be a fluctuation of
results. After repeating the test 10 times it has turned out that
Intel E5v3 CPU is not affected. I'm sorry for that.
I have then rerun the test on
On Mon, Aug 29, 2016 at 12:40:47PM +0200, Peter Zijlstra wrote:
> On Sun, Aug 28, 2016 at 08:19:46PM +0200, Jiri Olsa wrote:
> > Jirka, Peter and Jean-Pierre reported performance drop on
> > some cpus after making cpu offline and online again.
> >
> > The reason is the kernel logic that falls
On Mon, Aug 29, 2016 at 12:40:47PM +0200, Peter Zijlstra wrote:
> On Sun, Aug 28, 2016 at 08:19:46PM +0200, Jiri Olsa wrote:
> > Jirka, Peter and Jean-Pierre reported performance drop on
> > some cpus after making cpu offline and online again.
> >
> > The reason is the kernel logic that falls
On Sun, Aug 28, 2016 at 08:19:46PM +0200, Jiri Olsa wrote:
> Jirka, Peter and Jean-Pierre reported performance drop on
> some cpus after making cpu offline and online again.
>
> The reason is the kernel logic that falls back to SMT
> level topology if more than one node is detected within
> CPU
On Sun, Aug 28, 2016 at 08:19:46PM +0200, Jiri Olsa wrote:
> Jirka, Peter and Jean-Pierre reported performance drop on
> some cpus after making cpu offline and online again.
>
> The reason is the kernel logic that falls back to SMT
> level topology if more than one node is detected within
> CPU
Jirka, Peter and Jean-Pierre reported performance drop on
some cpus after making cpu offline and online again.
The reason is the kernel logic that falls back to SMT
level topology if more than one node is detected within
CPU package. During the system boot this logic cuts out
the DIE topology
Jirka, Peter and Jean-Pierre reported performance drop on
some cpus after making cpu offline and online again.
The reason is the kernel logic that falls back to SMT
level topology if more than one node is detected within
CPU package. During the system boot this logic cuts out
the DIE topology
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