From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: devel@linuxdriverproject.org
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
"K. Y. 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>,
Andy Lutomirski <luto@kernel.org>,
Andy Shevchenko <andy.shevchenko@gmail.com>
Subject: [PATCH v8 00/10] Hyper-V: paravirtualized remote TLB flushing and hypercall improvements
Date: Fri, 9 Jun 2017 15:27:26 +0200 [thread overview]
Message-ID: <20170609132736.13699-1-vkuznets@redhat.com> (raw)
Changes since v7:
- Minor code style fixes (drop explicit casting, reformat code a bit)
in PATCH3 and PATCH9 [Andy Shevchenko]
Original description:
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 3m33.118s
user 0m3.698s
sys 3m16.624s
After:
# time ./pthread_mmap ./randfile
real 2m19.920s
user 0m2.662s
sys 2m9.948s
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()
MAINTAINERS | 1 +
arch/x86/Kbuild | 2 +-
arch/x86/hyperv/Makefile | 2 +-
arch/x86/hyperv/hv_init.c | 90 ++++++------
arch/x86/hyperv/mmu.c | 268 ++++++++++++++++++++++++++++++++++++
arch/x86/include/asm/mshyperv.h | 148 +++++++++++++++++++-
arch/x86/include/asm/trace/hyperv.h | 38 +++++
arch/x86/include/uapi/asm/hyperv.h | 17 +++
arch/x86/kernel/cpu/mshyperv.c | 13 +-
drivers/hv/channel_mgmt.c | 20 +--
drivers/hv/connection.c | 7 +-
drivers/hv/hv.c | 9 --
drivers/hv/hyperv_vmbus.h | 11 --
drivers/hv/vmbus_drv.c | 17 ---
drivers/pci/host/pci-hyperv.c | 10 +-
include/linux/hyperv.h | 17 +--
16 files changed, 539 insertions(+), 131 deletions(-)
create mode 100644 arch/x86/hyperv/mmu.c
create mode 100644 arch/x86/include/asm/trace/hyperv.h
--
2.9.4
next reply other threads:[~2017-06-09 13:27 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-09 13:27 Vitaly Kuznetsov [this message]
2017-06-09 13:27 ` [PATCH v8 01/10] x86/hyper-v: include hyperv/ only when CONFIG_HYPERV is set Vitaly Kuznetsov
2017-06-09 13:27 ` [PATCH v8 02/10] x86/hyper-v: stash the max number of virtual/logical processor Vitaly Kuznetsov
2017-06-09 13:27 ` [PATCH v8 03/10] x86/hyper-v: make hv_do_hypercall() inline Vitaly Kuznetsov
2017-06-09 13:27 ` [PATCH v8 04/10] x86/hyper-v: fast hypercall implementation Vitaly Kuznetsov
2017-06-09 13:27 ` [PATCH v8 05/10] hyper-v: use fast hypercall for HVCALL_SIGNAL_EVENT Vitaly Kuznetsov
2017-06-09 13:27 ` [PATCH v8 06/10] x86/hyper-v: implement rep hypercalls Vitaly Kuznetsov
2017-06-09 13:27 ` [PATCH v8 07/10] hyper-v: globalize vp_index Vitaly Kuznetsov
2017-06-13 23:21 ` Stephen Hemminger
2017-06-14 2:29 ` Vitaly Kuznetsov
2017-06-14 4:31 ` Jork Loeser
2017-06-14 16:10 ` Stephen Hemminger
2017-06-09 13:27 ` [PATCH v8 08/10] x86/hyper-v: use hypercall for remote TLB flush Vitaly Kuznetsov
2017-06-09 13:27 ` [PATCH v8 09/10] x86/hyper-v: support extended CPU ranges for TLB flush hypercalls Vitaly Kuznetsov
2017-06-09 13:27 ` [PATCH v8 10/10] tracing/hyper-v: trace hyperv_mmu_flush_tlb_others() Vitaly Kuznetsov
2017-06-09 18:04 ` Steven Rostedt
2017-06-09 18:23 ` Andy Shevchenko
2017-06-09 18:32 ` Steven Rostedt
2017-06-09 18:40 ` Andy Shevchenko
2017-06-09 18:53 ` Paul Bolle
2017-06-09 19:07 ` Steven Rostedt
2017-06-12 2:56 ` Vitaly Kuznetsov
2017-06-09 16:04 ` [PATCH v8 00/10] Hyper-V: paravirtualized remote TLB flushing and hypercall improvements Andy Shevchenko
2017-06-09 16:14 ` Stephen Hemminger
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