diff options
| author | Wanpeng Li <wanpengli@tencent.com> | 2020-03-26 10:20:02 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-03-26 05:58:26 -0400 |
| commit | d5361678e63c8a5e72d75cee6d15b840c44306f2 (patch) | |
| tree | f7ff872c969cbe77c3c7e324302781097c0e3d5e /arch/s390/kvm | |
| parent | 8a1038de11a5536c76054061837b11648bec5b46 (diff) | |
| download | linux-d5361678e63c8a5e72d75cee6d15b840c44306f2.tar.bz2 | |
KVM: X86: Micro-optimize IPI fastpath delay
This patch optimizes the virtual IPI fastpath emulation sequence:
write ICR2 send virtual IPI
read ICR2 write ICR2
send virtual IPI ==> write ICR
write ICR
We can observe ~0.67% performance improvement for IPI microbenchmark
(https://lore.kernel.org/kvm/20171219085010.4081-1-ynorov@caviumnetworks.com/)
on Skylake server.
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1585189202-1708-4-git-send-email-wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/s390/kvm')
0 files changed, 0 insertions, 0 deletions