[PATCH 0/3] kvmppc: optimize path run on every exit

[PATCH 0/3] kvmppc: optimize path run on every exit

[ehrhardt]

From: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>

A small patch series of optimizations out of our discussions and my
experiments this week.
All patches improve the generic path executed for every exit we take,
therefore even a littel improvement can help a lot.

I would be happy if we could apply those soon. I'll continue looking into the
TLB stuff eating ~30% of our time. But since that might take a while I would be
happy if these three patches could be applied now (and relieve me, by not
having to keep them in sync).

Comments welcome, especially since exits still feel too long (current
assumption cache or tlb issues). See my other mails about exit timing on
kvm-ppc@vger.kernel.org

[patches in series]
Subject: [PATCH 1/3] kvmppc: optimize irq delivery path
Subject: [PATCH 2/3] kvmppc: optimize kvm stat handling
Subject: [PATCH 3/3] kvmppc: optimize find first bit

---
[diffstat]
 arch/powerpc/kvm/booke_guest.c   |  184 +++++++++++++++------------------------
 b/arch/powerpc/kvm/booke_guest.c |    2
 b/arch/powerpc/kvm/emulate.c     |   64 ++++++-------
 b/arch/powerpc/kvm/powerpc.c     |    5 -
 b/include/asm-powerpc/kvm_asm.h  |   18 +++
 b/include/asm-powerpc/kvm_ppc.h  |    9 -
 6 files changed, 130 insertions(+), 152 deletions(-)

[PATCH 0/3] kvmppc: optimize path run on every exit

[ehrhardt]

From: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>

updates in v2:
 * exception_priority back to char to save space (=>cache lines)
 * rebased to apply pre pvmem & exit timing patches
 * moved PRIO constants from kvm_asm.h to kvm_ppc.h
 * replaced 16x4byte interrupt_mask by single u32

A small patch series of optimizations out of our discussions and my
experiments this week.
All patches improve the generic path executed for every exit we take,
therefore even a littel improvement can help a lot.

I would be happy if we could apply those soon. I'll continue looking into the
TLB stuff eating ~30% of our time. But since that might take a while I would be
happy if these three patches could be applied now (and relieve me, by not
having to keep them in sync).

Comments welcome, especially since exits still feel too long (current
assumption cache or tlb issues). See my other mails about exit timing on
kvm-ppc@vger.kernel.org

[patches in series]
Subject: [PATCH 1/3] kvmppc: optimize irq delivery path
Subject: [PATCH 2/3] kvmppc: optimize kvm stat handling
Subject: [PATCH 3/3] kvmppc: optimize find first bit

---
[diffstat]
 arch/powerpc/kvm/booke_guest.c   |  187 ++++++++++++++-------------------------
 b/arch/powerpc/kvm/booke_guest.c |    2
 b/arch/powerpc/kvm/emulate.c     |  128 ++++++++++++++++++++------
 b/arch/powerpc/kvm/powerpc.c     |    5 -
 b/include/asm-powerpc/kvm_ppc.h  |   25 ++++-
 5 files changed, 191 insertions(+), 156 deletions(-)