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idle improvements again

Nicholas Piggin linuxppc-dev 2 versions – Applied

Status from this message: Applied to powerpc next, thanks.

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  1. v3 Latest3 patches 1 replyApplied
  2. v13 patches 12 repliesApplied

Patches in v3 Applied

#Subject and filesSizeRepliesApplied
1/3powerpc/64s/idle: POWER9 implement a separate idle stop function for hotplugarch/powerpc/include/asm/processor.h arch/powerpc/kernel/idle_book3s.S arch/powerpc/platforms/powernv/idle.c+17 -70 replies
2/3powerpc/64s/idle: avoid sync for KVM state when waking from idlearch/powerpc/kernel/idle_book3s.S+3 -00 replies
3/3powerpc/64s/idle: POWER9 ESL=0 stop avoid save/restore overheadarch/powerpc/kernel/idle_book3s.S+16 -291 reply

Reviews trailers per patch

No Reviewed-by, Acked-by or Tested-by trailers for v3 yet.

Read the v3 thread

Cover letter [PATCH v3 0/3] idle improvements again

Since last time, this has been rebased on top of the KVM / SMT4 forcing changes. It has also been updated so as to not disable EC=ESL=0 idle states for CPU unplug.

That case (and powersave=off) continues to be broken for KVM with unplugged dependent secondaries, but that's another issue.

This also has EC=ESL=0 states to skip the new hwsync added for the KVM workaround, which should increase their performance advantage a little further.

Thanks,
Nick

Nicholas Piggin (3):
powerpc/64s/idle: POWER9 implement a separate idle stop function for
hotplug
powerpc/64s/idle: avoid sync for KVM state when waking from idle powerpc/64s/idle: POWER9 ESL=0 stop avoid save/restore overhead

 arch/powerpc/include/asm/processor.h  |  1 +
 arch/powerpc/kernel/idle_book3s.S     | 69 +++++++++++++++++------------------
 arch/powerpc/platforms/powernv/idle.c |  2 +-
 3 files changed, 36 insertions(+), 36 deletions(-)
Signature · 1 line
2.16.3

Read the cover letter in its thread