From: Like Xu <like.xu.linux@gmail.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>
Cc: kvm@vger.kernel.org, Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Joerg Roedel <joro@8bytes.org>,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 0/7] Use static_call for kvm_pmu_ops
Date: Mon, 8 Nov 2021 19:10:25 +0800 [thread overview]
Message-ID: <20211108111032.24457-1-likexu@tencent.com> (raw)
Hi,
This is a successor to a previous patch set from Jason Baron. Let's convert
kvm_pmu_ops to use static_call. Shows good performance gains for
a typical perf use case [2] in the guest (results in patch 3/3).
V1 -> V2 Changelog:
- Export kvm_pmu_is_valid_msr() for nVMX [Sean]
- Land memcpy() above kvm_ops_static_call_update() [Sean]
- Move the pmu_ops to kvm_x86_init_ops and tagged as __initdata. [Sean]
- Move the kvm_ops_static_call_update() to x86.c [Sean]
- Drop kvm_pmu_ops_static_call_update() [Sean]
- Fix WARNING that macros KVM_X86_OP should not use a trailing semicolon
Previous:
https://lore.kernel.org/kvm/20211103070310.43380-1-likexu@tencent.com/
[1] https://lore.kernel.org/lkml/cover.1610680941.git.jbaron@akamai.com/
[2] perf record -e branch-instructions -e branch-misses \
-e cache-misses -e cache-references -e cpu-cycles \
-e instructions ./workload
Thanks,
Like Xu (7):
KVM: x86: Export kvm_pmu_is_valid_msr() for nVMX
KVM: x86: Fix WARNING that macros should not use a trailing semicolon
KVM: x86: Move kvm_ops_static_call_update() to x86.c
KVM: x86: Copy kvm_pmu_ops by value to eliminate layer of indirection
KVM: x86: Move .pmu_ops to kvm_x86_init_ops and tagged as __initdata
KVM: x86: Introduce definitions to support static calls for
kvm_pmu_ops
KVM: x86: Use static calls to reduce kvm_pmu_ops overhead
arch/x86/include/asm/kvm-x86-ops.h | 218 ++++++++++++-------------
arch/x86/include/asm/kvm-x86-pmu-ops.h | 32 ++++
arch/x86/include/asm/kvm_host.h | 14 +-
arch/x86/kvm/pmu.c | 46 +++---
arch/x86/kvm/pmu.h | 9 +-
arch/x86/kvm/svm/pmu.c | 2 +-
arch/x86/kvm/svm/svm.c | 2 +-
arch/x86/kvm/vmx/nested.c | 2 +-
arch/x86/kvm/vmx/pmu_intel.c | 2 +-
arch/x86/kvm/vmx/vmx.c | 2 +-
arch/x86/kvm/x86.c | 16 +-
11 files changed, 199 insertions(+), 146 deletions(-)
create mode 100644 arch/x86/include/asm/kvm-x86-pmu-ops.h
--
2.33.0
next reply other threads:[~2021-11-08 11:10 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-08 11:10 Like Xu [this message]
2021-11-08 11:10 ` [PATCH v2 1/7] KVM: x86: Export kvm_pmu_is_valid_msr() for nVMX Like Xu
2021-12-08 17:55 ` Sean Christopherson
2021-11-08 11:10 ` [PATCH v2 2/7] KVM: x86: Fix WARNING that macros should not use a trailing semicolon Like Xu
2021-11-08 11:10 ` [PATCH v2 3/7] KVM: x86: Move kvm_ops_static_call_update() to x86.c Like Xu
2021-11-08 11:10 ` [PATCH v2 4/7] KVM: x86: Copy kvm_pmu_ops by value to eliminate layer of indirection Like Xu
2021-12-08 18:10 ` Sean Christopherson
2021-11-08 11:10 ` [PATCH v2 5/7] KVM: x86: Move .pmu_ops to kvm_x86_init_ops and tagged as __initdata Like Xu
2021-12-08 18:17 ` Sean Christopherson
2021-11-08 11:10 ` [PATCH v2 6/7] KVM: x86: Introduce definitions to support static calls for kvm_pmu_ops Like Xu
2021-12-08 18:35 ` Sean Christopherson
2021-12-09 12:50 ` Like Xu
2021-11-08 11:10 ` [PATCH v2 7/7] KVM: x86: Use static calls to reduce kvm_pmu_ops overhead Like Xu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20211108111032.24457-1-likexu@tencent.com \
--to=like.xu.linux@gmail.com \
--cc=jmattson@google.com \
--cc=joro@8bytes.org \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=pbonzini@redhat.com \
--cc=seanjc@google.com \
--cc=vkuznets@redhat.com \
--cc=wanpengli@tencent.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).