From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Emilio G . Cota" <cota@braap.org>
Subject: [Qemu-devel] [PATCH 0/4] Optionally use membarrier system call for RCU
Date: Fri, 9 Mar 2018 14:29:18 +0100 [thread overview]
Message-ID: <20180309132922.24211-1-pbonzini@redhat.com> (raw)
I didn't have time to check whether it improves performance (not
too likely, since QEMU tends to have pretty long RCU critical
sections), but it cannot hurt either. :)
For microbenchmark results, see patch 4.
Paolo
Paolo Bonzini (4):
rcutorture: remove synchronize_rcu from readers
rcu: make memory barriers more explicit
membarrier: introduce qemu/sys_membarrier.h
membarrier: add --enable-membarrier
configure | 41 ++++++++++++++++++++++++++++++++++-
include/qemu/rcu.h | 16 ++++++++++++--
include/qemu/sys_membarrier.h | 27 +++++++++++++++++++++++
tests/rcutorture.c | 4 ---
util/Makefile.objs | 1 +
util/rcu.c | 15 +++++++++----
util/sys_membarrier.c | 50 +++++++++++++++++++++++++++++++++++++++++++
7 files changed, 143 insertions(+), 11 deletions(-)
create mode 100644 include/qemu/sys_membarrier.h
create mode 100644 util/sys_membarrier.c
--
2.14.3
next reply other threads:[~2018-03-09 13:29 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-09 13:29 Paolo Bonzini [this message]
2018-03-09 13:29 ` [Qemu-devel] [PATCH 1/4] rcutorture: remove synchronize_rcu from readers Paolo Bonzini
2018-03-09 13:29 ` [Qemu-devel] [PATCH 2/4] rcu: make memory barriers more explicit Paolo Bonzini
2018-03-09 13:29 ` [Qemu-devel] [PATCH 3/4] membarrier: introduce qemu/sys_membarrier.h Paolo Bonzini
2018-03-09 13:29 ` [Qemu-devel] [PATCH 4/4] membarrier: add --enable-membarrier Paolo Bonzini
2018-03-22 1:29 ` Emilio G. Cota
2018-03-22 8:57 ` Paolo Bonzini
2018-03-09 13:37 ` [Qemu-devel] [PATCH 0/4] Optionally use membarrier system call for RCU no-reply
2018-03-22 1:03 ` Emilio G. Cota
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