ml at netfence.it
Fri Sep 23 06:38:34 UTC 2016
On 09/22/16 10:06, Ralf Mardorf via freebsd-questions wrote:
(I'm resending this because I don't see it on the list; please forgive
me if you receive this twice).
> You noticed the follow-up?
Yes, I think my problem is solved (no crash in two days)!
> Well, a practical workaround is always to build the port yourself using
> different OPTIONs :-)
That's what I've always done: however I did not know which option to
tweak until I saw your message yesterday.
> Jokes aside, your point is of course valid. It seems there are still a
> large enough number of i386 CPUs in production that can't work with
> the SSE/SSE2-optimisations in ffmpeg.
My CPU is actually 64b; it's running i386 since it was an upgrade to an
old system, built more than 10 (possibly even 15) years ago. I just
never felt an urge to convert since it's working fine enough for me.
However I notice an ever-growing number of ports that don't seem to get
too much attention on this architecture.
> We might need to drop these
> optimisations in the set of default OPTIONs on i386.
I guess so; knowing my CPU should support SSE I've always enabled it,
however. Maybe some warning is better?
> In your particular case: What exact CPU is this?
> CPU: AMD Phenom(tm) II X4 925 Processor (2800.23-MHz 686-class CPU)
> Origin="AuthenticAMD" Id=0x100f42 Family=0x10 Model=0x4 Stepping=2
> AMD Features=0xee500800<SYSCALL,NX,MMX+,FFXSR,Page1GB,RDTSCP,LM,3DNow!+,3DNow!>
> AMD Features2=0x37ff<LAHF,CMP,SVM,ExtAPIC,CR8,ABM,SSE4A,MAS,Prefetch,OSVW,IBS,SKINIT,WDT>
> SVM: NP,NRIP,NAsids=64
> TSC: P-state invariant
Is this known to be buggy (and perhaps fixable via a BIOS upgrade)? Or
is it a ffmpeg bug? Clang "feature"? ...?
> Could you confirm
> that building an ffmpeg package without the SSE OPTION resolves the
> issue for you?
I wasn't able to watch Youtube before; I can now (not that I care that
much, but it's a quite sure test :).
I had FireFox crashing every few minutes (as soon as I landed on a page
with a nice animated advertisement that AdBlock Plus would let through);
now, as I said, it hasn't crashed in the last two days.
bye & Thanks
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