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* [Xen-devel] [PATCH 0/4] Xen on Hyper-V: Implement L0 assisted TLB flush
@ 2020-02-12 16:09 Wei Liu
  2020-02-12 16:09 ` [Xen-devel] [PATCH 1/4] x86/hyperv: misc cleanup Wei Liu
                   ` (3 more replies)
  0 siblings, 4 replies; 23+ messages in thread
From: Wei Liu @ 2020-02-12 16:09 UTC (permalink / raw)
  To: Xen Development List
  Cc: Wei Liu, Wei Liu, Andrew Cooper, Paul Durrant, Michael Kelley,
	Jan Beulich, Roger Pau Monné

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 (4):
  x86/hyperv: misc cleanup
  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       |  19 +-
 xen/arch/x86/guest/hyperv/private.h      |  15 +-
 xen/arch/x86/guest/hyperv/tlb.c          | 211 +++++++++++++++++++++++
 xen/arch/x86/guest/hyperv/util.c         |  72 ++++++++
 xen/arch/x86/guest/hypervisor.c          |   4 +-
 xen/arch/x86/guest/xen/xen.c             |   2 +-
 xen/arch/x86/smp.c                       |   2 +-
 xen/include/asm-x86/guest/hyperv-hcall.h |   5 +-
 xen/include/asm-x86/guest/hypervisor.h   |  10 +-
 10 files changed, 329 insertions(+), 13 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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^ permalink raw reply	[flat|nested] 23+ messages in thread

end of thread, other threads:[~2020-02-14 10:48 UTC | newest]

Thread overview: 23+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-02-12 16:09 [Xen-devel] [PATCH 0/4] Xen on Hyper-V: Implement L0 assisted TLB flush Wei Liu
2020-02-12 16:09 ` [Xen-devel] [PATCH 1/4] x86/hyperv: misc cleanup Wei Liu
2020-02-12 16:53   ` Roger Pau Monné
2020-02-13 10:30     ` Wei Liu
2020-02-13  8:43   ` Durrant, Paul
2020-02-13  9:46   ` Jan Beulich
2020-02-13 12:24     ` Wei Liu
2020-02-13 13:32       ` Jan Beulich
2020-02-12 16:09 ` [Xen-devel] [PATCH 2/4] x86/hypervisor: pass flags to hypervisor_flush_tlb Wei Liu
2020-02-12 17:00   ` Roger Pau Monné
2020-02-13  8:48     ` Durrant, Paul
2020-02-13 10:29       ` Wei Liu
2020-02-13 11:56         ` Wei Liu
2020-02-12 16:09 ` [Xen-devel] [PATCH 3/4] x86/hyperv: skeleton for L0 assisted TLB flush Wei Liu
2020-02-12 17:09   ` Roger Pau Monné
2020-02-12 23:01     ` Wei Liu
2020-02-12 16:09 ` [Xen-devel] [PATCH 4/4] x86/hyperv: " Wei Liu
2020-02-12 17:43   ` Roger Pau Monné
2020-02-13  9:49     ` Jan Beulich
2020-02-13 12:25       ` Wei Liu
2020-02-13 12:20     ` Wei Liu
2020-02-13 12:41       ` Roger Pau Monné
2020-02-14 10:47         ` Wei Liu

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