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Re: [Qemu-devel] [PATCH 4/5] main-loop: remove now unnecessary optimizat
From: |
Alex Bennée |
Subject: |
Re: [Qemu-devel] [PATCH 4/5] main-loop: remove now unnecessary optimization |
Date: |
Mon, 13 Mar 2017 16:23:53 +0000 |
User-agent: |
mu4e 0.9.19; emacs 25.2.9 |
Paolo Bonzini <address@hidden> writes:
> This optimization is not necessary anymore, because the vCPU now drops
> the I/O thread lock even with TCG. Drop it to simplify the code and
> avoid the "I/O thread spun for 1000 iterations" warning.
>
> Signed-off-by: Paolo Bonzini <address@hidden>
Reviewed-by: Alex Bennée <address@hidden>
> ---
> vl.c | 5 +----
> 1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/vl.c b/vl.c
> index bbbf1ba..b21b57e 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -1884,17 +1884,14 @@ static bool main_loop_should_exit(void)
>
> static void main_loop(void)
> {
> - bool nonblocking;
> - int last_io = 0;
> #ifdef CONFIG_PROFILER
> int64_t ti;
> #endif
> do {
> - nonblocking = tcg_enabled() && last_io > 0;
> #ifdef CONFIG_PROFILER
> ti = profile_getclock();
> #endif
> - last_io = main_loop_wait(nonblocking);
> + main_loop_wait(false);
> #ifdef CONFIG_PROFILER
> dev_time += profile_getclock() - ti;
> #endif
--
Alex Bennée
- Re: [Qemu-devel] [PATCH 2/5] qemu-timer: do not include sysemu/cpus.h from util/qemu-timer.h, (continued)
- [Qemu-devel] [PATCH 1/5] qemu-timer: fix off-by-one, Paolo Bonzini, 2017/03/03
- [Qemu-devel] [PATCH 4/5] main-loop: remove now unnecessary optimization, Paolo Bonzini, 2017/03/03
- [Qemu-devel] [PATCH 5/5] icount: process QEMU_CLOCK_VIRTUAL timers in vCPU thread, Paolo Bonzini, 2017/03/03
- Re: [Qemu-devel] [PATCH 5/5] icount: process QEMU_CLOCK_VIRTUAL timers in vCPU thread, Alex Bennée, 2017/03/13
- Re: [Qemu-devel] [PATCH 5/5] icount: process QEMU_CLOCK_VIRTUAL timers in vCPU thread, Paolo Bonzini, 2017/03/13
- Re: [Qemu-devel] [PATCH 5/5] icount: process QEMU_CLOCK_VIRTUAL timers in vCPU thread, Alex Bennée, 2017/03/13
- Re: [Qemu-devel] [PATCH 5/5] icount: process QEMU_CLOCK_VIRTUAL timers in vCPU thread, Paolo Bonzini, 2017/03/14
- Re: [Qemu-devel] [PATCH 5/5] icount: process QEMU_CLOCK_VIRTUAL timers in vCPU thread, Paolo Bonzini, 2017/03/14
- Re: [Qemu-devel] [PATCH 5/5] icount: process QEMU_CLOCK_VIRTUAL timers in vCPU thread, Alex Bennée, 2017/03/14
- Re: [Qemu-devel] [PATCH 5/5] icount: process QEMU_CLOCK_VIRTUAL timers in vCPU thread, Paolo Bonzini, 2017/03/14
[Qemu-devel] [PATCH 3/5] cpus: define QEMUTimerListNotifyCB for QEMU system emulation, Paolo Bonzini, 2017/03/03