Re: buildds: rv-osuosl-01 vs rv-mullvad-03
On 2022-08-31 19:10, Aurelien Jarno wrote:
> Hi,
>
> On 2022-08-31 17:46, Mathieu Malaterre wrote:
> > Hi Manuel !
> >
> > On Wed, Aug 31, 2022 at 3:49 PM Manuel A. Fernandez Montecelo
> > <manuel.montezelo@gmail.com> wrote:
> > >
> > > Hi,
> > >
> > > On Wed, 31 Aug 2022 at 13:49, Mathieu Malaterre <malat@debian.org> wrote:
> > > >
> > > > Would you have an explanation for the repeated failures (FTBFS) of
> > > > highway on rv-plct-04 / rv-plct-06 & rv-plct-07 ?
> > > >
> > > > As mentioned previously I cannot reproduce it on my side neither
> > > > schroot / nor real hardware.
> > >
> > > I scheduled another rebuild, it ended up in rv-plct-03, trying again
> > > to see if we have more luck now...
> > >
> > > As for the failures in rv-plct-xx machines, yeah, there have been
> > > reports in the last few days in several packages, not sure what's
> > > going on -- aurel32 checked and one possible cause is high
> > > temperature, but no definitive conclusions yet.
> > >
> > > Maybe it would be good to disable them temporarily, or add some delay
> > > so the more stable machines get more chances and so to avoid this
> > > affecting and causing alarm and mistrust among maintianers.
> >
> > Ok, thanks for the update.
> >
> > While on the subject (no finger pointing - just curiosity). Could
> > someone confirm why I am seeing old packages on riscv-64:
> >
> > [...]g++-12_12.1.0-8 gcc-12_12.1.0-8[...]
> >
> > ref:
> >
> > * https://buildd.debian.org/status/fetch.php?pkg=highway&arch=riscv64&ver=1.0.1-2&stamp=1661954239&raw=0
>
> This is a combination of gcc-12 being late to be built due to a first
> FTBFS on a not really stable buildd and broken mirrors due to the rsync
> security update. Anyway that's not the issue here.
>
> The illegal instruction is the following one and comes from inline
> assembly code in highway:
>
> 0x0000003f861eaf0a <+92>: add a5,a5,sp
> => 0x0000003f861eaf0c <+94>: rdcycle a3
> 0x0000003f861eaf10 <+98>: rdcycle a4
This is a shorter reproducer:
---o---
#include <stdio.h>
#include <stdint.h>
int main()
{
uint64_t t;
asm volatile("rdcycle %0" : "=r"(t));
printf("cycles: %ld\n", t);
}
---o---
It works fine on
- QEMU running a 5.18.16-1 kernel
- Hifive Unleashed running a 5.10.28 kernel
- Polarfire Icicle running kernel 5.18.14-1
However it produces a SIGILL on
- Hifive Unmatched running a 5.18.14-1 kernel
- Hifive Unmatched running a 5.18.16-1 kernel
I do not have any real explanation for the issue, and I don't know if
this issue is new or not. I am a bit reluctant to test older kernel
version on remote hosts. Any ideas or test is therefore welcome.
Cheers
Aurelien
--
Aurelien Jarno GPG: 4096R/1DDD8C9B
aurelien@aurel32.net http://www.aurel32.net
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