From: Wanpeng Li <kernellwp@gmail.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Yunhong Jiang" <yunhong.jiang@intel.com>,
"Wanpeng Li" <wanpeng.li@hotmail.com>
Subject: [PATCH v3 0/5] KVM: LAPIC: Add APIC Timer periodic/oneshot mode VMX preemption timer support
Date: Mon, 24 Oct 2016 18:23:08 +0800 [thread overview]
Message-ID: <1477304593-3453-1-git-send-email-wanpeng.li@hotmail.com> (raw)
Most windows guests which I have on hand currently still utilize APIC Timer
periodic/oneshot mode instead of APIC Timer tsc-deadline mode:
- windows 2008 server r2
- windows 2012 server r2
- windows 7
- windows 10
This patchset adds the APIC Timer periodic/oneshot mode VMX preemption
timer support.
I test the patchset by adding kvm-unit-test/apic_timer_latency.flat to test
100 thousands times APIC timer operations.
The patchset reduces ~5600+ cycles for each APIC timer periodic mode operation
virtualization.
v3 -> v2:
* fix windows server verison guest boot hang (by adding period check in
start_sw_period and kvm_lapic_expired_hv_timer)
v2 -> v1:
* replace ktime_compare by ktime_after
* introduce advance_periodic_target_expiration() and use it in kvm_lapic_expired_hv_timer()
and in apic_timer_fn()
* don't zero apic->lapic_timer.target_expiration of apic_lvtt_period() when
!kvm_lapic_hv_timer_in_use
v1 -> RFC v3:
* squash patch 3 into patch 6
* fix switch sw to hv timer
RFC v2 -> RFC v3:
* remove kvm_lapic_hv_timer_in_use() check in apic_get_tmcc, replace
the hritmer_get_remaining() by target_expiration - now
* rename expired_period to target_expiration
* introduce set_target_expiration() helper
* move the checking of minimal period to set_target_expiration()
* cleanup kvm_get_lapic_target_deadline_tsc()
RFC v1 -> RFC v2:
* remember the timeout when setting up the timer to get a correct TMCCT
* move apic->lapic_timer.period/tscdeadline caculations to start_apic_timer()
Wanpeng Li (5):
KVM: LAPIC: extract start_sw_period() to handle periodic/oneshot mode
KVM: LAPIC: guarantee the timer is in tsc-deadline mode
KVM: LAPIC: introduce kvm_get_lapic_target_expiration_tsc()
KVM: LAPIC: rename start/cancel_hv_tscdeadline to start/cancel_hv_timer
KVM: LAPIC: add APIC Timer periodic/oneshot mode VMX preemption timer support
arch/x86/kvm/lapic.c | 207 ++++++++++++++++++++++++++++++++++-----------------
arch/x86/kvm/lapic.h | 2 +
arch/x86/kvm/x86.c | 2 +-
3 files changed, 143 insertions(+), 68 deletions(-)
--
1.9.1
next reply other threads:[~2016-10-24 10:23 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-24 10:23 Wanpeng Li [this message]
2016-10-24 10:23 ` [PATCH v3 1/5] KVM: LAPIC: extract start_sw_period() to handle periodic/oneshot mode Wanpeng Li
2016-10-24 10:23 ` [PATCH v3 2/5] KVM: LAPIC: guarantee the timer is in tsc-deadline mode Wanpeng Li
2016-10-24 10:23 ` [PATCH v3 3/5] KVM: LAPIC: introduce kvm_get_lapic_target_expiration_tsc() Wanpeng Li
2016-10-24 10:23 ` [PATCH v3 4/5] KVM: LAPIC: rename start/cancel_hv_tscdeadline to start/cancel_hv_timer Wanpeng Li
2016-10-24 10:23 ` [PATCH v3 5/5] KVM: LAPIC: add APIC Timer periodic/oneshot mode VMX preemption timer support Wanpeng Li
2016-10-24 14:50 ` Radim Krčmář
2016-10-24 23:33 ` Wanpeng Li
2016-10-24 15:03 ` [PATCH 6/5] KVM: x86: fix periodic lapic timer with hrtimers Radim Krčmář
2016-10-24 15:09 ` Paolo Bonzini
2016-10-24 15:27 ` Radim Krčmář
2016-10-24 23:39 ` Wanpeng Li
2016-10-25 11:43 ` Radim Krčmář
2016-10-25 11:55 ` Paolo Bonzini
2016-10-26 6:02 ` Wanpeng Li
2016-10-26 6:08 ` Wanpeng Li
2016-10-26 14:01 ` Radim Krčmář
2016-10-27 2:33 ` Wanpeng Li
2016-10-26 13:32 ` Radim Krčmář
2016-10-27 2:11 ` Wanpeng Li
2016-10-26 10:23 ` Wanpeng Li
2016-10-26 11:15 ` Paolo Bonzini
2016-10-26 11:26 ` Wanpeng Li
[not found] ` <SG2PR02MB1550E0FF04F2614BE0E262BC80A80@SG2PR02MB1550.apcprd02.prod.outlook.com>
2016-10-25 13:03 ` Radim Krčmář
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