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a9ab13ff6e
IPI and Timer cause the main MSRs write vmexits in cloud environment observation, let's optimize virtual IPI latency more aggressively to inject target IPI as soon as possible. Running kvm-unit-tests/vmexit.flat IPI testing on SKX server, disable adaptive advance lapic timer and adaptive halt-polling to avoid the interference, this patch can give another 7% improvement. w/o fastpath -> x86.c fastpath 4238 -> 3543 16.4% x86.c fastpath -> vmx.c fastpath 3543 -> 3293 7% w/o fastpath -> vmx.c fastpath 4238 -> 3293 22.3% Cc: Haiwei Li <lihaiwei@tencent.com> Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Message-Id: <20200410174703.1138-3-sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.