* No significant diff b/w qemux86 and qemuarm poky build of core-image-minimal
@ 2021-03-30 17:45 Randy MacLeod
2021-03-30 19:40 ` Khem Raj
0 siblings, 1 reply; 5+ messages in thread
From: Randy MacLeod @ 2021-03-30 17:45 UTC (permalink / raw)
To: Khem Raj, Yocto discussion list
Khem was asking if anyone had seen a >30% difference in build time for
qemuarm compared to other machines. I don't when building on my system:
rmacleod@yow-rmacleod-lx3 b/c-i-m-x86 $ cat x86
real 43m29.142s
user 0m19.887s
sys 0m4.110s
rmacleod@yow-rmacleod-lx3 b/c-i-m-x86 $ cat arm
real 42m58.185s
user 0m19.546s
sys 0m3.867s
This machine is relatively isolated in that there are no other users.
The arm build was done second and I didn't pre-populate the downloads
but so that may account for the 30 second difference.
I wasn't using sstate for either build.
--
# Randy MacLeod
# Wind River Linux
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: No significant diff b/w qemux86 and qemuarm poky build of core-image-minimal
2021-03-30 17:45 No significant diff b/w qemux86 and qemuarm poky build of core-image-minimal Randy MacLeod
@ 2021-03-30 19:40 ` Khem Raj
2021-03-30 20:48 ` [yocto] " Ross Burton
0 siblings, 1 reply; 5+ messages in thread
From: Khem Raj @ 2021-03-30 19:40 UTC (permalink / raw)
To: Randy MacLeod, Yocto discussion list
On 3/30/21 10:45 AM, Randy MacLeod wrote:
> Khem was asking if anyone had seen a >30% difference in build time for
> qemuarm compared to other machines. I don't when building on my system:
>
> rmacleod@yow-rmacleod-lx3 b/c-i-m-x86 $ cat x86
> real 43m29.142s
> user 0m19.887s
> sys 0m4.110s
>
> rmacleod@yow-rmacleod-lx3 b/c-i-m-x86 $ cat arm
> real 42m58.185s
> user 0m19.546s
> sys 0m3.867s
>
> This machine is relatively isolated in that there are no other users.
> The arm build was done second and I didn't pre-populate the downloads
> but so that may account for the 30 second difference.
> I wasn't using sstate for either build.
Thanks for this infor Randy, really appreciated, I think I will also
look at the h/w angle.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [yocto] No significant diff b/w qemux86 and qemuarm poky build of core-image-minimal
2021-03-30 19:40 ` Khem Raj
@ 2021-03-30 20:48 ` Ross Burton
2021-03-30 21:19 ` Khem Raj
0 siblings, 1 reply; 5+ messages in thread
From: Ross Burton @ 2021-03-30 20:48 UTC (permalink / raw)
To: Khem Raj; +Cc: Randy MacLeod, Yocto discussion list
On Tue, 30 Mar 2021 at 20:41, Khem Raj <raj.khem@gmail.com> wrote:
> Thanks for this infor Randy, really appreciated, I think I will also
> look at the h/w angle.
Khem: if you can reproduce this on demand with a clean build (ie
oe-init-build-env with a clean build directory, just set DL_DIR) then
enabling buildstats would give some interesting metrics.
buildstats-diff can compare two build runs and tell you what the
differences are.
Ross
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [yocto] No significant diff b/w qemux86 and qemuarm poky build of core-image-minimal
2021-03-30 20:48 ` [yocto] " Ross Burton
@ 2021-03-30 21:19 ` Khem Raj
2021-04-08 4:30 ` Khem Raj
0 siblings, 1 reply; 5+ messages in thread
From: Khem Raj @ 2021-03-30 21:19 UTC (permalink / raw)
To: Ross Burton; +Cc: Randy MacLeod, Yocto discussion list
On 3/30/21 1:48 PM, Ross Burton wrote:
> On Tue, 30 Mar 2021 at 20:41, Khem Raj <raj.khem@gmail.com> wrote:
>> Thanks for this infor Randy, really appreciated, I think I will also
>> look at the h/w angle.
>
> Khem: if you can reproduce this on demand with a clean build (ie
> oe-init-build-env with a clean build directory, just set DL_DIR) then
> enabling buildstats would give some interesting metrics.
> buildstats-diff can compare two build runs and tell you what the
> differences are.
>
yeah this is doing world build of not only core but several other layers
included a usual build takes around 10 hrs for this machine config, I am
planning to
1. Collect build stats
2. buiid another qemu machine on this VM
it could very well be rotting hardware underneath the VM.
> Ross
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [yocto] No significant diff b/w qemux86 and qemuarm poky build of core-image-minimal
2021-03-30 21:19 ` Khem Raj
@ 2021-04-08 4:30 ` Khem Raj
0 siblings, 0 replies; 5+ messages in thread
From: Khem Raj @ 2021-04-08 4:30 UTC (permalink / raw)
To: Ross Burton; +Cc: Randy MacLeod, Yocto discussion list
On Tue, Mar 30, 2021 at 2:20 PM Khem Raj <raj.khem@gmail.com> wrote:
>
>
>
> On 3/30/21 1:48 PM, Ross Burton wrote:
> > On Tue, 30 Mar 2021 at 20:41, Khem Raj <raj.khem@gmail.com> wrote:
> >> Thanks for this infor Randy, really appreciated, I think I will also
> >> look at the h/w angle.
> >
> > Khem: if you can reproduce this on demand with a clean build (ie
> > oe-init-build-env with a clean build directory, just set DL_DIR) then
> > enabling buildstats would give some interesting metrics.
> > buildstats-diff can compare two build runs and tell you what the
> > differences are.
> >
>
> yeah this is doing world build of not only core but several other layers
> included a usual build takes around 10 hrs for this machine config, I am
> planning to
>
> 1. Collect build stats
> 2. buiid another qemu machine on this VM
>
> it could very well be rotting hardware underneath the VM.
>
To close the loop, it turned out to be the case that CPU performance
on VM has deteriorated
which stress-ng showed. The VM has been rebuilt and everything seems
to be holding fine now.
Thanks for your help and chiming in.
> > Ross
> >
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-04-08 4:31 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-03-30 17:45 No significant diff b/w qemux86 and qemuarm poky build of core-image-minimal Randy MacLeod
2021-03-30 19:40 ` Khem Raj
2021-03-30 20:48 ` [yocto] " Ross Burton
2021-03-30 21:19 ` Khem Raj
2021-04-08 4:30 ` Khem Raj
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