From: KY Srinivasan <kys@microsoft.com>
To: Vitaly Kuznetsov <vkuznets@redhat.com>,
"devel@linuxdriverproject.org" <devel@linuxdriverproject.org>,
"x86@kernel.org" <x86@kernel.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Haiyang Zhang" <haiyangz@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
Steven Rostedt <rostedt@goodmis.org>,
"Jork Loeser" <Jork.Loeser@microsoft.com>,
Simon Xiao <sixiao@microsoft.com>
Subject: RE: [PATCH v2 00/10] Hyper-V: praravirtualized remote TLB flushing and hypercall improvements
Date: Thu, 4 May 2017 20:00:44 +0000 [thread overview]
Message-ID: <DM5PR03MB2490A01196713CDA3C891905A0EA0@DM5PR03MB2490.namprd03.prod.outlook.com> (raw)
In-Reply-To: <20170412104326.19126-1-vkuznets@redhat.com>
> -----Original Message-----
> From: Vitaly Kuznetsov [mailto:vkuznets@redhat.com]
> Sent: Wednesday, April 12, 2017 3:43 AM
> To: devel@linuxdriverproject.org; x86@kernel.org
> Cc: linux-kernel@vger.kernel.org; KY Srinivasan <kys@microsoft.com>;
> Haiyang Zhang <haiyangz@microsoft.com>; Stephen Hemminger
> <sthemmin@microsoft.com>; Thomas Gleixner <tglx@linutronix.de>; Ingo
> Molnar <mingo@redhat.com>; H. Peter Anvin <hpa@zytor.com>; Steven
> Rostedt <rostedt@goodmis.org>; Jork Loeser
> <Jork.Loeser@microsoft.com>; Simon Xiao <sixiao@microsoft.com>
> Subject: [PATCH v2 00/10] Hyper-V: praravirtualized remote TLB flushing and
> hypercall improvements
>
> Changes since v1:
> - Add a patch to build code in arch/x86/hyperv/ only when CONFIG_HYPERV
> is
> set.
> - Add a patch to get maximum virtual/logical processor on Hyper-V.
> - Add additional clobbers to hypercalls [Jork Loeser]
> - Add variable header size support to rep hypercalls.
> - Rename vmbus_cpu_number_to_vp_number ->
> hv_cpu_number_to_vp_number
> [K. Y. Srinivasan]
> - Remove spinlocks from hyperv_flush_tlb_others() [Jork Loeser]
> - Account for mm==NULL in hyperv_flush_tlb_others() [Simon Xiao]
> - Add support for HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX/LIST_EX
> hypercalls
> to support >64 vCPUs [K. Y. Srinivasan, Jork Loeser]
> - Move hyperv.h to arch-specific place [Steven Rostedt]
> - Rebased to the latest char-misc-next tree.
>
> Original descriptions:
>
> Hyper-V supports hypercalls for doing local and remote TLB flushing and
> gives its guests hints when using hypercall is preferred. While doing
> hypercalls for local TLB flushes is probably not practical (and is not
> being suggested by modern Hyper-V versions) remote TLB flush with a
> hypercall brings significant improvement.
>
> To test the series I wrote a special 'TLB trasher': on a 16 vCPU guest I
> was creating 32 threads which were doing 100000 mmap/munmaps each on
> some
> big file. Here are the results:
>
> Before:
> # time ./pthread_mmap ./randfile
> real 3m44.994s
> user 0m3.829s
> sys 3m36.323s
>
> After:
> # time ./pthread_mmap ./randfile
> real 2m57.145s
> user 0m3.797s
> sys 2m34.812s
>
> This series brings a number of small improvements along the way: fast
> hypercall implementation and using it for event signaling, rep hypercalls
> implementation, hyperv tracing subsystem (which only traces the newly
> added
> remote TLB flush for now).
>
> Vitaly Kuznetsov (10):
> x86/hyper-v: include hyperv/ only when CONFIG_HYPERV is set
> x86/hyper-v: stash the max number of virtual/logical processor
> x86/hyper-v: make hv_do_hypercall() inline
> x86/hyper-v: fast hypercall implementation
> hyper-v: use fast hypercall for HVCALL_SIGNAL_EVENT
> x86/hyper-v: implement rep hypercalls
> hyper-v: globalize vp_index
> x86/hyper-v: use hypercall for remote TLB flush
> x86/hyper-v: support extended CPU ranges for TLB flush hypercalls
> tracing/hyper-v: trace hyperv_mmu_flush_tlb_others()
Thanks Vitaly; we have tested these patches on various platforms of interest.
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Tested-by: Simon Xiao <sixiao@microsoft.com>
Tested-by: Srikanth Myakam <v-srm@microsoft.com>
Regards,
K. Y
>
> MAINTAINERS | 1 +
> arch/x86/Kbuild | 4 +-
> arch/x86/hyperv/Makefile | 2 +-
> arch/x86/hyperv/hv_init.c | 90 ++++++------
> arch/x86/hyperv/mmu.c | 270
> ++++++++++++++++++++++++++++++++++++
> arch/x86/include/asm/mshyperv.h | 148 +++++++++++++++++++-
> arch/x86/include/asm/trace/hyperv.h | 34 +++++
> arch/x86/include/uapi/asm/hyperv.h | 36 +++++
> arch/x86/kernel/cpu/mshyperv.c | 14 +-
> drivers/hv/channel_mgmt.c | 22 ++-
> drivers/hv/connection.c | 8 +-
> drivers/hv/hv.c | 9 --
> drivers/hv/hyperv_vmbus.h | 11 --
> drivers/hv/vmbus_drv.c | 17 ---
> drivers/pci/host/pci-hyperv.c | 4 +-
> include/linux/hyperv.h | 21 ++-
> 16 files changed, 567 insertions(+), 124 deletions(-)
> create mode 100644 arch/x86/hyperv/mmu.c
> create mode 100644 arch/x86/include/asm/trace/hyperv.h
>
> --
> 2.9.3
prev parent reply other threads:[~2017-05-04 20:00 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-12 10:43 [PATCH v2 00/10] Hyper-V: praravirtualized remote TLB flushing and hypercall improvements Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 01/10] x86/hyper-v: include hyperv/ only when CONFIG_HYPERV is set Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 02/10] x86/hyper-v: stash the max number of virtual/logical processor Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 03/10] x86/hyper-v: make hv_do_hypercall() inline Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 04/10] x86/hyper-v: fast hypercall implementation Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 05/10] hyper-v: use fast hypercall for HVCALL_SIGNAL_EVENT Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 06/10] x86/hyper-v: implement rep hypercalls Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 07/10] hyper-v: globalize vp_index Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 08/10] x86/hyper-v: use hypercall for remote TLB flush Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 09/10] x86/hyper-v: support extended CPU ranges for TLB flush hypercalls Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 10/10] tracing/hyper-v: trace hyperv_mmu_flush_tlb_others() Vitaly Kuznetsov
2017-05-04 20:00 ` KY Srinivasan [this message]
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