Hi Dan,
I have read the doc your provided. Before I try it, I can catch "floating-point
assist fault" in /var/log/messages both IA64 Native and Xen0.
Then I do the test: use compile flag -ffast-math to rebuild float cases, there
are no FPSWA fault in the dmesg, while the case can still pass in the Native
Linux. So ... I am not sure if am I right.
I also try the program provided in the doc. But I get interesting different
results between Native and Xen0.
Native will get FPSWA fault as the doc said when iteration equals to 1024. But
Xen0 will get FPSWA fault and Floating point exception, when iteration only
equals to 1022.
Best Regards,
Yongkang (Kangkang) 永康
>-----Original Message-----
>From: Magenheimer, Dan (HP Labs Fort Collins)
>[mailto:dan.magenheimer@xxxxxx]
>Sent: 2006年1月26日 8:11
>To: You, Yongkang; xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
>Subject: RE: [Xen-ia64-devel] 2 LTP math cases failed in xen0
>
>An easier way to check is described here:
>
>http://i-cluster2.inrialpes.fr/doc/misc/fpswa.txt
>
>> -----Original Message-----
>> From: Magenheimer, Dan (HP Labs Fort Collins)
>> Sent: Wednesday, January 25, 2006 3:23 PM
>> To: 'You, Yongkang'; xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
>> Subject: RE: [Xen-ia64-devel] 2 LTP math cases failed in xen0
>>
>> There may be better ways of turning off FPSWA, but
>> here's one that should work:
>>
>> Change linux/arch/ia64/kernel/traps.c:trap_init() so
>> that fpswa_interface is always set to 0.
>>
>> If a native kernel without this change passes the
>> two LTP float_* tests but the same native kernel with
>> this change fails, it would explain why Xen/ia64 doesn't
>> work on the tests... Xen/ia64 doesn't support FPSWA.
>>
>> > -----Original Message-----
>> > From: You, Yongkang [mailto:yongkang.you@xxxxxxxxx]
>> > Sent: Sunday, January 22, 2006 6:54 PM
>> > To: Magenheimer, Dan (HP Labs Fort Collins);
>> > xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
>> > Subject: RE: [Xen-ia64-devel] 2 LTP math cases failed in xen0
>> >
>> > Hi Dan,
>> >
>> > I am not sure about how to check if those math cases are
>> > using FPSWA. I greped the key word in float math cases, but
>> > nothing found.
>> >
>> > 1 information is that these 2 cases (float_exp_log and
>> > float_power) can pass in the VTi and IA32 testing. I paste
>> > the float codes in the attachment tar ball. Hope it can give
>> > some help. If need any information, please let me know.
>> >
>> > Best Regards,
>> > Yongkang (Kangkang) 永康
>> >
>> > >-----Original Message-----
>> > >From: Magenheimer, Dan (HP Labs Fort Collins)
>> > >[mailto:dan.magenheimer@xxxxxx]
>> > >Sent: 2006年1月21日 1:23
>> > >To: You, Yongkang; xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
>> > >Subject: RE: [Xen-ia64-devel] 2 LTP math cases failed in xen0
>> > >
>> > >Hi Yongkang --
>> > >
>> > >Could you see if the math tests that fail are using
>> > >FPSWA (the EFI floating point software assist module)?
>> > >I think it is possible to boot Linux with FPSWA disabled.
>> > >If this also fails these math tests, it would explain
>> > >why Xen/ia64 fails these tests as Xen/ia64 does not
>> > >currently support FPSWA (or any EFI modules).
>> > >
>> > >Thanks,
>> > >Dan
>> > >
>> > >> -----Original Message-----
>> > >> From: xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx
>> > >> [mailto:xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf
>> > >> Of You, Yongkang
>> > >> Sent: Friday, January 20, 2006 12:35 AM
>> > >> To: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
>> > >> Subject: [Xen-ia64-devel] 2 LTP math cases failed in xen0
>> > >>
>> > >> Hi all,
>> > >>
>> > >> I have run a basic LTP testing on Xen0. Except for 1 system
>> > >> call case failed has reported, there are 2 math cases failed
>> > >> too. But they can pass in the Native Linux of the same
>> > >> hardware environment. These two cases are related to float
>> > >> calculation.
>> > >>
>> > >> The testing environment is:
>> > >> Xen source is xen-ia64-unstable tree Changeset 8476.
>> > >> CPU is Intel Montecito.
>> > >> Native and service OS Linux is RHEL4u2.
>> > >> The LTP is the one of 2005-12-5.
>> > >>
>> > >> The attachment is the summary of testing results. This time I
>> > >> run these test suites:
>> > >> systemcall, memory test, disk io, nptl, math, ipc, pty,
>> sched, fs.
>> > >>
>> > >> I will try to run more testing of LTP and report issues. Hope
>> > >> it can help to stable xen0. :)
>> > >>
>> > >> Best Regards,
>> > >> Yongkang (Kangkang) 永康
>> > >>
>> > >>
>> >
>>
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