| Message ID | 20210928093157.14620-3-wangyanan55@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | qemu-options: Trivial doc fixes related to -smp | expand |
On 9/28/21 11:31, Yanan Wang wrote: > There is one example of -smp CLI in qemu-options.hx currently > using "-smp 2" and assuming that there will be 2 sockets. > However now the actually calculation logic of missing sockets > and cores is not immutable, we should use more explicit CLIs > like "-smp 2,sockets=2" if we want multiple sockets. > > Signed-off-by: Yanan Wang <wangyanan55@huawei.com> > --- > qemu-options.hx | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/qemu-options.hx b/qemu-options.hx > index dcd9595650..ff8917c5e1 100644 > --- a/qemu-options.hx > +++ b/qemu-options.hx > @@ -395,7 +395,7 @@ SRST > -m 2G \ > -object memory-backend-ram,size=1G,id=m0 \ > -object memory-backend-ram,size=1G,id=m1 \ > - -smp 2 \ > + -smp 2,sockets=2,maxcpus=2 \ Is the addition of "maxcpus=2" intentional? > -numa node,nodeid=0,memdev=m0 \ > -numa node,nodeid=1,memdev=m1,initiator=0 \ > -numa cpu,node-id=0,socket-id=0 \ >
On 2021/9/28 18:46, Philippe Mathieu-Daudé wrote: > On 9/28/21 11:31, Yanan Wang wrote: >> There is one example of -smp CLI in qemu-options.hx currently >> using "-smp 2" and assuming that there will be 2 sockets. >> However now the actually calculation logic of missing sockets >> and cores is not immutable, we should use more explicit CLIs >> like "-smp 2,sockets=2" if we want multiple sockets. >> >> Signed-off-by: Yanan Wang <wangyanan55@huawei.com> >> --- >> qemu-options.hx | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/qemu-options.hx b/qemu-options.hx >> index dcd9595650..ff8917c5e1 100644 >> --- a/qemu-options.hx >> +++ b/qemu-options.hx >> @@ -395,7 +395,7 @@ SRST >> -m 2G \ >> -object memory-backend-ram,size=1G,id=m0 \ >> -object memory-backend-ram,size=1G,id=m1 \ >> - -smp 2 \ >> + -smp 2,sockets=2,maxcpus=2 \ > Is the addition of "maxcpus=2" intentional? Yes, but it's not necessary IMO. I just wanted to keep consistency with other numa config examples in the Doc. Should I remove it ? Thanks, Yanan >> -numa node,nodeid=0,memdev=m0 \ >> -numa node,nodeid=1,memdev=m1,initiator=0 \ >> -numa cpu,node-id=0,socket-id=0 \ >> > .
On Tue, Sep 28, 2021 at 06:58:20PM +0800, wangyanan (Y) wrote: > > On 2021/9/28 18:46, Philippe Mathieu-Daudé wrote: > > On 9/28/21 11:31, Yanan Wang wrote: > > > There is one example of -smp CLI in qemu-options.hx currently > > > using "-smp 2" and assuming that there will be 2 sockets. > > > However now the actually calculation logic of missing sockets > > > and cores is not immutable, we should use more explicit CLIs > > > like "-smp 2,sockets=2" if we want multiple sockets. > > > > > > Signed-off-by: Yanan Wang <wangyanan55@huawei.com> > > > --- > > > qemu-options.hx | 2 +- > > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > > > diff --git a/qemu-options.hx b/qemu-options.hx > > > index dcd9595650..ff8917c5e1 100644 > > > --- a/qemu-options.hx > > > +++ b/qemu-options.hx > > > @@ -395,7 +395,7 @@ SRST > > > -m 2G \ > > > -object memory-backend-ram,size=1G,id=m0 \ > > > -object memory-backend-ram,size=1G,id=m1 \ > > > - -smp 2 \ > > > + -smp 2,sockets=2,maxcpus=2 \ > > Is the addition of "maxcpus=2" intentional? > Yes, but it's not necessary IMO. I just wanted to keep consistency > with other numa config examples in the Doc. Should I remove it ? I think it makes sense to be explicit, because the numa config works in terms of maxcpus when splitting cpus between nodes Regards, Daniel
On 2021/9/28 19:01, Daniel P. Berrangé wrote: > On Tue, Sep 28, 2021 at 06:58:20PM +0800, wangyanan (Y) wrote: >> On 2021/9/28 18:46, Philippe Mathieu-Daudé wrote: >>> On 9/28/21 11:31, Yanan Wang wrote: >>>> There is one example of -smp CLI in qemu-options.hx currently >>>> using "-smp 2" and assuming that there will be 2 sockets. >>>> However now the actually calculation logic of missing sockets >>>> and cores is not immutable, we should use more explicit CLIs >>>> like "-smp 2,sockets=2" if we want multiple sockets. >>>> >>>> Signed-off-by: Yanan Wang <wangyanan55@huawei.com> >>>> --- >>>> qemu-options.hx | 2 +- >>>> 1 file changed, 1 insertion(+), 1 deletion(-) >>>> >>>> diff --git a/qemu-options.hx b/qemu-options.hx >>>> index dcd9595650..ff8917c5e1 100644 >>>> --- a/qemu-options.hx >>>> +++ b/qemu-options.hx >>>> @@ -395,7 +395,7 @@ SRST >>>> -m 2G \ >>>> -object memory-backend-ram,size=1G,id=m0 \ >>>> -object memory-backend-ram,size=1G,id=m1 \ >>>> - -smp 2 \ >>>> + -smp 2,sockets=2,maxcpus=2 \ >>> Is the addition of "maxcpus=2" intentional? >> Yes, but it's not necessary IMO. I just wanted to keep consistency >> with other numa config examples in the Doc. Should I remove it ? > I think it makes sense to be explicit, because the numa config > works in terms of maxcpus when splitting cpus between nodes The statement of this numa config example actually assume that there will be 2 cpus totally. Although based on behavior of the smp parser we will get maxcpus=2, I also tend to keep it explicitly. But I should update subject of this patch and the commit message. Thanks, Yanan
On 9/28/21 13:42, wangyanan (Y) wrote: > > On 2021/9/28 19:01, Daniel P. Berrangé wrote: >> On Tue, Sep 28, 2021 at 06:58:20PM +0800, wangyanan (Y) wrote: >>> On 2021/9/28 18:46, Philippe Mathieu-Daudé wrote: >>>> On 9/28/21 11:31, Yanan Wang wrote: >>>>> There is one example of -smp CLI in qemu-options.hx currently >>>>> using "-smp 2" and assuming that there will be 2 sockets. >>>>> However now the actually calculation logic of missing sockets >>>>> and cores is not immutable, we should use more explicit CLIs >>>>> like "-smp 2,sockets=2" if we want multiple sockets. >>>>> >>>>> Signed-off-by: Yanan Wang <wangyanan55@huawei.com> >>>>> --- >>>>> qemu-options.hx | 2 +- >>>>> 1 file changed, 1 insertion(+), 1 deletion(-) >>>>> >>>>> diff --git a/qemu-options.hx b/qemu-options.hx >>>>> index dcd9595650..ff8917c5e1 100644 >>>>> --- a/qemu-options.hx >>>>> +++ b/qemu-options.hx >>>>> @@ -395,7 +395,7 @@ SRST >>>>> -m 2G \ >>>>> -object memory-backend-ram,size=1G,id=m0 \ >>>>> -object memory-backend-ram,size=1G,id=m1 \ >>>>> - -smp 2 \ >>>>> + -smp 2,sockets=2,maxcpus=2 \ >>>> Is the addition of "maxcpus=2" intentional? >>> Yes, but it's not necessary IMO. I just wanted to keep consistency >>> with other numa config examples in the Doc. Should I remove it ? >> I think it makes sense to be explicit, because the numa config >> works in terms of maxcpus when splitting cpus between nodes > The statement of this numa config example actually assume that > there will be 2 cpus totally. Although based on behavior of the > smp parser we will get maxcpus=2, I also tend to keep it explicitly. > > But I should update subject of this patch and the commit message. Once updated: Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
diff --git a/qemu-options.hx b/qemu-options.hx index dcd9595650..ff8917c5e1 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -395,7 +395,7 @@ SRST -m 2G \ -object memory-backend-ram,size=1G,id=m0 \ -object memory-backend-ram,size=1G,id=m1 \ - -smp 2 \ + -smp 2,sockets=2,maxcpus=2 \ -numa node,nodeid=0,memdev=m0 \ -numa node,nodeid=1,memdev=m1,initiator=0 \ -numa cpu,node-id=0,socket-id=0 \
There is one example of -smp CLI in qemu-options.hx currently using "-smp 2" and assuming that there will be 2 sockets. However now the actually calculation logic of missing sockets and cores is not immutable, we should use more explicit CLIs like "-smp 2,sockets=2" if we want multiple sockets. Signed-off-by: Yanan Wang <wangyanan55@huawei.com> --- qemu-options.hx | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)