From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: mtosatti@redhat.com
Subject: [PATCH 0/4] kvmclock: improve accuracy
Date: Mon, 8 Feb 2016 16:18:27 +0100 [thread overview]
Message-ID: <1454944711-33022-1-git-send-email-pbonzini@redhat.com> (raw)
Currently kvmclock is obtaining the multiplier and shift value from
the TSC kHz. These however are less accurate than the host kernel's
clock, which includes corrections made through NTP.
These patches change kvmclock to tick at the same frequency as the
host kernel's clocksource (as obtained through the pvclock_gtod
notifier). This is precise enough that the Hyper-V clock can be
implemented on top of it.
Paolo Bonzini (4):
KVM: x86: rename argument to kvm_set_tsc_khz
KVM: x86: rewrite handling of scaled TSC for kvmclock
KVM: x86: pass kvm_get_time_scale arguments in hertz
KVM: x86: track actual TSC frequency from the timekeeper struct
arch/x86/include/asm/kvm_host.h | 3 +-
arch/x86/kvm/x86.c | 73 +++++++++++++++++++++++++----------------
2 files changed, 47 insertions(+), 29 deletions(-)
--
1.8.3.1
next reply other threads:[~2016-02-08 15:18 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-08 15:18 Paolo Bonzini [this message]
2016-02-08 15:18 ` [PATCH 1/4] KVM: x86: rename argument to kvm_set_tsc_khz Paolo Bonzini
2016-02-11 15:01 ` Marcelo Tosatti
2016-02-08 15:18 ` [PATCH 2/4] KVM: x86: rewrite handling of scaled TSC for kvmclock Paolo Bonzini
2016-02-11 15:23 ` Marcelo Tosatti
2016-02-08 15:18 ` [PATCH 3/4] KVM: x86: pass kvm_get_time_scale arguments in hertz Paolo Bonzini
2016-02-08 15:18 ` [PATCH 4/4] KVM: x86: track actual TSC frequency from the timekeeper struct Paolo Bonzini
2016-02-09 18:41 ` Owen Hofmann
2016-02-10 13:57 ` Paolo Bonzini
2016-02-16 13:48 ` Marcelo Tosatti
2016-02-16 14:25 ` Marcelo Tosatti
2016-02-16 16:59 ` Paolo Bonzini
2016-02-19 14:12 ` Marcelo Tosatti
2016-02-19 15:53 ` Paolo Bonzini
2016-02-16 14:00 ` [PATCH 0/4] kvmclock: improve accuracy Marcelo Tosatti
-- strict thread matches above, loose matches on Subject: below --
2016-01-28 14:04 [PATCH kvm-unit-tests] KVM: x86: add hyperv clock test case Paolo Bonzini
2016-01-28 14:04 ` Paolo Bonzini
2016-01-28 14:25 ` Andrey Smetanin
2016-01-28 14:50 ` Paolo Bonzini
2016-01-28 15:53 ` Paolo Bonzini
2016-01-28 18:45 ` Roman Kagan
2016-01-28 18:53 ` Roman Kagan
2016-01-28 21:28 ` Paolo Bonzini
2016-01-28 16:22 ` Roman Kagan
2016-02-03 16:37 ` Paolo Bonzini
2016-02-04 9:33 ` Roman Kagan
2016-02-04 10:13 ` Paolo Bonzini
2016-02-04 11:12 ` Roman Kagan
2016-04-21 17:01 ` Roman Kagan
2016-04-22 13:32 ` Roman Kagan
2016-04-22 18:08 ` Paolo Bonzini
2016-04-25 8:47 ` Roman Kagan
2016-04-26 10:34 ` Roman Kagan
2016-05-25 18:33 ` Roman Kagan
2016-05-26 14:47 ` Roman Kagan
2016-05-29 22:34 ` Marcelo Tosatti
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