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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BXT]15% performance drop in SynMark v7.0 Multithread use-case"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102334#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [BXT]15% performance drop in SynMark v7.0 Multithread use-case"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102334">bug 102334</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>First bisection gives:
commit 3fed382b46baac83703130fe4cd3d9147f427fb9
Author: Rik van Riel <<a href="mailto:riel@redhat.com">riel@redhat.com</a>>
Date: Fri Jun 23 12:55:29 2017 -0400
sched/numa: Implement NUMA node level wake_affine()
Since select_idle_sibling() can place a task anywhere on a socket,
comparing loads between individual CPU cores makes no real sense
for deciding whether to do an affine wakeup across sockets, either.
Instead, compare the load between the sockets in a similar way the
load balancer and the numa balancing code do.
Signed-off-by: Rik van Riel <<a href="mailto:riel@redhat.com">riel@redhat.com</a>>
Cc: Linus Torvalds <<a href="mailto:torvalds@linux-foundation.org">torvalds@linux-foundation.org</a>>
Cc: Mel Gorman <<a href="mailto:mgorman@suse.de">mgorman@suse.de</a>>
Cc: Mike Galbraith <<a href="mailto:efault@gmx.de">efault@gmx.de</a>>
Cc: Peter Zijlstra <<a href="mailto:peterz@infradead.org">peterz@infradead.org</a>>
Cc: Thomas Gleixner <<a href="mailto:tglx@linutronix.de">tglx@linutronix.de</a>>
Cc: <a href="mailto:jhladky@redhat.com">jhladky@redhat.com</a>
Cc: <a href="mailto:linux-kernel@vger.kernel.org">linux-kernel@vger.kernel.org</a>
Link: <a href="http://lkml.kernel.org/r/20170623165530.22514-4-riel@redhat.com">http://lkml.kernel.org/r/20170623165530.22514-4-riel@redhat.com</a>
Signed-off-by: Ingo Molnar <<a href="mailto:mingo@kernel.org">mingo@kernel.org</a>></pre>
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