From: Wei Liu <wl@xen.org>
To: Xen Development List <xen-devel@lists.xenproject.org>
Cc: "Wei Liu" <liuwe@microsoft.com>, "Wei Liu" <wl@xen.org>,
"Andrew Cooper" <andrew.cooper3@citrix.com>,
"Paul Durrant" <pdurrant@amazon.com>,
"Michael Kelley" <mikelley@microsoft.com>,
"Jan Beulich" <jbeulich@suse.com>,
"Roger Pau Monné" <roger.pau@citrix.com>
Subject: [Xen-devel] [PATCH v4 0/3] Xen on Hyper-V: Implement L0 assisted TLB flush
Date: Wed, 19 Feb 2020 11:44:08 +0000 [thread overview]
Message-ID: <20200219114411.26922-1-liuwe@microsoft.com> (raw)
Hi all
This seris is based on Roger's L0 assisted flush series.
I have done some testing against a Linux on Hyper-V in a 32-vcpu VM.
All builds were done with -j32.
Building Xen on Linux:
real 0m45.376s
user 2m28.156s
sys 0m51.672s
Building Xen on Linux on Xen on Hyper-V, no assisted flush:
real 3m8.762s
user 10m46.787s
sys 30m14.492s
Building Xen on Linux on Xen on Hyper-V, with assisted flush:
real 0m44.369s
user 3m16.231s
sys 3m3.330s
Building Linux x86_64_defconfig on Linux:
real 0m59.698s
user 21m14.014s
sys 2m58.742s
Building Linux x86_64_defconfig on Linux on Xen on Hyper-V, no assisted
flush:
real 2m6.284s
user 31m18.706s
sys 20m31.106s
Building Linux x86_64_defconfig on Linux on Xen on Hyper-V, with assisted
flush:
real 1m38.968s
user 28m40.398s
sys 11m20.151s
There are various degrees of improvement depending on the workload. Xen
can perhaps be optmised a bit more because it currently doesn't pass the
address space id (cr3) to Hyper-V, but that requires reworking TLB flush
APIs within Xen.
Wei.
Cc: Jan Beulich <jbeulich@suse.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Wei Liu <wl@xen.org>
Cc: Roger Pau Monné <roger.pau@citrix.com>
Cc: Michael Kelley <mikelley@microsoft.com>
Cc: Paul Durrant <pdurrant@amazon.com>
Wei Liu (3):
x86/hypervisor: pass flags to hypervisor_flush_tlb
x86/hyperv: skeleton for L0 assisted TLB flush
x86/hyperv: L0 assisted TLB flush
xen/arch/x86/guest/hyperv/Makefile | 2 +
xen/arch/x86/guest/hyperv/hyperv.c | 17 ++
xen/arch/x86/guest/hyperv/private.h | 12 ++
xen/arch/x86/guest/hyperv/tlb.c | 214 +++++++++++++++++++++++++
xen/arch/x86/guest/hyperv/util.c | 75 +++++++++
xen/arch/x86/guest/hypervisor.c | 7 +-
xen/arch/x86/guest/xen/xen.c | 2 +-
xen/arch/x86/smp.c | 5 +-
xen/include/asm-x86/flushtlb.h | 3 +
xen/include/asm-x86/guest/hypervisor.h | 10 +-
10 files changed, 336 insertions(+), 11 deletions(-)
create mode 100644 xen/arch/x86/guest/hyperv/tlb.c
create mode 100644 xen/arch/x86/guest/hyperv/util.c
--
2.20.1
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next reply other threads:[~2020-02-19 11:44 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-19 11:44 Wei Liu [this message]
2020-02-19 11:44 ` [Xen-devel] [PATCH v4 1/3] x86/hypervisor: pass flags to hypervisor_flush_tlb Wei Liu
2020-03-09 16:38 ` Jan Beulich
2020-03-09 17:25 ` Wei Liu
2020-03-10 9:58 ` Jan Beulich
2020-03-10 13:39 ` Wei Liu
2020-02-19 11:44 ` [Xen-devel] [PATCH v4 2/3] x86/hyperv: skeleton for L0 assisted TLB flush Wei Liu
2020-02-19 11:44 ` [Xen-devel] [PATCH v4 3/3] x86/hyperv: " Wei Liu
2020-02-19 17:52 ` Roger Pau Monné
2020-02-20 10:53 ` Durrant, Paul
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