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Re: [Qemu-devel] [PATCH qemu] sysemu: support up to 1024 vCPUs
From: |
Igor Mammedov |
Subject: |
Re: [Qemu-devel] [PATCH qemu] sysemu: support up to 1024 vCPUs |
Date: |
Tue, 18 Oct 2016 13:00:07 +0200 |
On Tue, 11 Oct 2016 09:19:10 +1100
Alexey Kardashevskiy <address@hidden> wrote:
> Ping, anyone?
I have a similar patch
http://patchwork.ozlabs.org/patch/681709/
which bumps limit to 288 and does a little bit more
so it wouldn't affect current users.
After that's merged, I plan to get rid of this limit and
make that part of numa parsing code dynamic so that it
wouldn't impose such limit/any limits on target code.
>
>
> On 04/10/16 11:33, Alexey Kardashevskiy wrote:
> > From: Greg Kurz <address@hidden>
> >
> > Some systems can already provide more than 255 hardware threads.
> >
> > Bumping the QEMU limit to 1024 seems reasonable:
> > - it has no visible overhead in top;
> > - the limit itself has no effect on hot paths.
> >
> > Signed-off-by: Greg Kurz <address@hidden>
> > Signed-off-by: Alexey Kardashevskiy <address@hidden>
> > ---
> > include/sysemu/sysemu.h | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
> > index ef2c50b..2ec0bd8 100644
> > --- a/include/sysemu/sysemu.h
> > +++ b/include/sysemu/sysemu.h
> > @@ -173,7 +173,7 @@ extern int mem_prealloc;
> > *
> > * Note that cpu->get_arch_id() may be larger than MAX_CPUMASK_BITS.
> > */
> > -#define MAX_CPUMASK_BITS 255
> > +#define MAX_CPUMASK_BITS 1024
> >
> > #define MAX_OPTION_ROMS 16
> > typedef struct QEMUOptionRom {
> >
>
>
- [Qemu-devel] [PATCH qemu] sysemu: support up to 1024 vCPUs, Alexey Kardashevskiy, 2016/10/03
- Re: [Qemu-devel] [PATCH qemu] sysemu: support up to 1024 vCPUs, Alexey Kardashevskiy, 2016/10/10
- Re: [Qemu-devel] [PATCH qemu] sysemu: support up to 1024 vCPUs, Alexey Kardashevskiy, 2016/10/17
- Re: [Qemu-devel] [PATCH qemu] sysemu: support up to 1024 vCPUs,
Igor Mammedov <=
- Re: [Qemu-devel] [PATCH qemu] sysemu: support up to 1024 vCPUs, Greg Kurz, 2016/10/18
- Re: [Qemu-devel] [PATCH qemu] sysemu: support up to 1024 vCPUs, Alexey Kardashevskiy, 2016/10/18
- Re: [Qemu-devel] [PATCH qemu] sysemu: support up to 1024 vCPUs, Igor Mammedov, 2016/10/19
- Re: [Qemu-devel] [PATCH qemu] sysemu: support up to 1024 vCPUs, Alexey Kardashevskiy, 2016/10/23
- Re: [Qemu-devel] [PATCH qemu] sysemu: support up to 1024 vCPUs, Igor Mammedov, 2016/10/24