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From: Marcelo Tosatti <mtosatti@redhat.com>
To: kvm@vger.kernel.org
Cc: johnstul@us.ibm.com, jeremy@goop.org
Subject: [patch 00/15] pvclock vsyscall support + KVM hypervisor support
Date: Tue, 16 Oct 2012 14:56:19 -0300	[thread overview]
Message-ID: <20121016175619.194848607@redhat.com> (raw)

This patchset, based on earlier work by Jeremy Fitzhardinge, implements
paravirtual clock vsyscall support.

It should be possible to implement Xen support relatively easily.

It reduces clock_gettime from 500 cycles to 200 cycles 
on my testbox (including an mfence, that measurement).

NOTE: exporting pvclock tsc stable bit if the guest TSCs are
not synchronized is incorrect, next version will have that fixed.

Please review.




             reply	other threads:[~2012-10-16 18:22 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-16 17:56 Marcelo Tosatti [this message]
2012-10-16 17:56 ` [patch 01/15] KVM: x86: retain pvclock guest stopped bit in guest memory Marcelo Tosatti
2012-10-16 17:56 ` [patch 02/15] x86: pvclock: make sure rdtsc doesnt speculate out of region Marcelo Tosatti
2012-10-16 17:56 ` [patch 03/15] x86: pvclock: remove pvclock_shadow_time Marcelo Tosatti
2012-10-16 17:56 ` [patch 04/15] x86: pvclock: create helper for pvclock data retrieval Marcelo Tosatti
2012-10-16 17:56 ` [patch 05/15] x86: pvclock: fix flags usage race Marcelo Tosatti
2012-10-16 17:56 ` [patch 06/15] x86: pvclock: introduce helper to read flags Marcelo Tosatti
2012-10-16 17:56 ` [patch 07/15] sched: add notifier for cross-cpu migrations Marcelo Tosatti
2012-10-16 17:56 ` [patch 08/15] x86: pvclock: generic pvclock vsyscall initialization Marcelo Tosatti
2012-10-16 17:56 ` [patch 09/15] x86: kvm guest: pvclock vsyscall support Marcelo Tosatti
2012-10-16 17:56 ` [patch 10/15] x86: vsyscall: pass mode to gettime backend Marcelo Tosatti
2012-10-16 17:56 ` [patch 11/15] x86: vdso: pvclock gettime support Marcelo Tosatti
2012-10-16 17:56 ` [patch 12/15] KVM: x86: introduce facility to support vsyscall pvclock, via MSR Marcelo Tosatti
2012-10-16 17:56 ` [patch 13/15] KVM: x86: pass host_tsc to read_l1_tsc Marcelo Tosatti
2012-10-16 17:56 ` [patch 14/15] time: export time information for KVM pvclock Marcelo Tosatti
2012-10-16 17:56 ` [patch 15/15] KVM: x86: implement PVCLOCK_TSC_STABLE_BIT pvclock flag Marcelo Tosatti

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