From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55795) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V9dMZ-0007Rs-TZ for qemu-devel@nongnu.org; Wed, 14 Aug 2013 11:52:02 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1V9dMT-0007xx-CD for qemu-devel@nongnu.org; Wed, 14 Aug 2013 11:51:55 -0400 Received: from mail-qe0-f54.google.com ([209.85.128.54]:63688) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V9dMT-0007xj-9G for qemu-devel@nongnu.org; Wed, 14 Aug 2013 11:51:49 -0400 Received: by mail-qe0-f54.google.com with SMTP id i11so37295qej.41 for ; Wed, 14 Aug 2013 08:51:48 -0700 (PDT) From: Mike Day Date: Wed, 14 Aug 2013 11:50:46 -0400 Message-Id: <1376495450-5133-11-git-send-email-ncmike@ncultra.org> In-Reply-To: <1376495450-5133-1-git-send-email-ncmike@ncultra.org> References: <1376495450-5133-1-git-send-email-ncmike@ncultra.org> Subject: [Qemu-devel] [RFC PATCH 10/14] cpus: report RCU quiescent states List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Paolo Bonzini From: Paolo Bonzini CPU threads have extended quiescent states while relinquishing control to the accelerator (except TCG). Signed-off-by: Paolo Bonzini Reviewed-by: Mike Day --- cpus.c | 3 +++ kvm-all.c | 3 +++ 2 files changed, 6 insertions(+) diff --git a/cpus.c b/cpus.c index 0f65e76..624658e 100644 --- a/cpus.c +++ b/cpus.c @@ -37,6 +37,7 @@ #include "sysemu/qtest.h" #include "qemu/main-loop.h" #include "qemu/bitmap.h" +#include "qemu/rcu.h" #ifndef _WIN32 #include "qemu/compatfd.h" @@ -818,6 +819,7 @@ static void *qemu_dummy_cpu_thread_fn(void *arg) while (1) { current_cpu = NULL; qemu_mutex_unlock_iothread(); + rcu_thread_offline(); do { int sig; r = sigwait(&waitset, &sig); @@ -826,6 +828,7 @@ static void *qemu_dummy_cpu_thread_fn(void *arg) perror("sigwait"); exit(1); } + rcu_thread_online(); qemu_mutex_lock_iothread(); current_cpu = cpu; qemu_wait_io_event_common(cpu); diff --git a/kvm-all.c b/kvm-all.c index 716860f..a47573d 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -33,6 +33,7 @@ #include "exec/memory.h" #include "exec/address-spaces.h" #include "qemu/event_notifier.h" +#include "qemu/rcu.h" #include "trace.h" /* This check must be after config-host.h is included */ @@ -1641,7 +1642,9 @@ int kvm_cpu_exec(CPUState *cpu) } qemu_mutex_unlock_iothread(); + rcu_thread_offline(); run_ret = kvm_vcpu_ioctl(cpu, KVM_RUN, 0); + rcu_thread_online(); qemu_mutex_lock_iothread(); kvm_arch_post_run(cpu, run); -- 1.8.3.1