Subject: Re: rare brokenness in latency output - FPU bug! - msg#00157

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Website migration

Dear Xenomai users, Xenomai website is undergoing a migration to a new server in order to offer better and more flexible services. You may encounter some connection problems, notice invalid URL or find bad links while browsing the website. We apologize for the inconveniences and we will do everything possible to  finish the migration by the end of the week-end. Best regards, Bruno Rouchouse _______________________________________________ Xenomai-core mailing list Xenomai-core@xxxxxxx https://mail.gna.org/listinfo/xenomai-core

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Re: rare brokenness in latency output - FPU bug!

On Wed, 2006-09-20 at 12:20 -0500, Jeff Webb wrote: > Philippe Gerum wrote: > > On Tue, 2006-09-19 at 09:48 -0500, Jeff Webb wrote: > >> Jeff Webb wrote: > >>> I don't have a plain xenomai-2.2.2 kernel handy, but I do have a patched > >>> version. I do not have any problems with switchtest for xenomai-2.2.2 > >>> with the following patches: > >>> > >>> https://mail.gna.org/public/xenomai-help/2006-09/msg00084.html > >>> https://mail.gna.org/public/xenomai-help/2006-09/msg00096.html > >>> > >>> These patches are to nucleus pipe.c and pipe.h / rtai fifo.c and fifo.h. > >>> > >>> I am running an Athlon64 X2 in with 32-bit Fedora Core 5. > >> I have done a couple more tests using xenomai from subversion. Here is a > >> summary of all the results I have so far: > >> > >> xenomai-2.2.2 (patched as described above): switchtest runs > >> svn/xenomai/trunk (r1586): switchtest runs > >> svn/xenomai/trunk (r1589): switchtest runs > >> xenomai-2.2.3 : switchtest fails > >> > >> This is on my Fedora Core 5 (32-bit x86), linux-2.6.17.13 SMP, ipipe-1.3 > >> (except 1.4 for 2.2.3), gcc-4.1.1, Athlon64 X2. > >> > >> Hopefully this will help, > > > > It does, thanks. This confirms Jan's findings that something went wrong > > from #1595. The issue is spotted now, somewhere in the FPU save/restore > > code in the x86 support layer. > > I just rebuilt 2.2.3 with the latest FPU fix patch posted by Philippe: > > https://mail.gna.org/public/xenomai-help/2006-09/msg00157.html > > This appears to fix the FPU switchtest bug on my Athlon64 X2 (2.6 kernel) > machine. Great job! > > Thanks for the hard work, > Gilles did the work actually. I've just relayed it. > Jeff > > _______________________________________________ > Xenomai-core mailing list > Xenomai-core@xxxxxxx > https://mail.gna.org/listinfo/xenomai-core -- Philippe.

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Re: rare brokenness in latency output - FPU bug!

On Tue, 2006-09-19 at 09:48 -0500, Jeff Webb wrote: > Jeff Webb wrote: > > I don't have a plain xenomai-2.2.2 kernel handy, but I do have a patched > > version. I do not have any problems with switchtest for xenomai-2.2.2 > > with the following patches: > > > > https://mail.gna.org/public/xenomai-help/2006-09/msg00084.html > > https://mail.gna.org/public/xenomai-help/2006-09/msg00096.html > > > > These patches are to nucleus pipe.c and pipe.h / rtai fifo.c and fifo.h. > > > > I am running an Athlon64 X2 in with 32-bit Fedora Core 5. > > I have done a couple more tests using xenomai from subversion. Here is a > summary of all the results I have so far: > > xenomai-2.2.2 (patched as described above): switchtest runs > svn/xenomai/trunk (r1586): switchtest runs > svn/xenomai/trunk (r1589): switchtest runs > xenomai-2.2.3 : switchtest fails > > This is on my Fedora Core 5 (32-bit x86), linux-2.6.17.13 SMP, ipipe-1.3 > (except 1.4 for 2.2.3), gcc-4.1.1, Athlon64 X2. > > Hopefully this will help, It does, thanks. This confirms Jan's findings that something went wrong from #1595. The issue is spotted now, somewhere in the FPU save/restore code in the x86 support layer. > > -Jeff > > > _______________________________________________ > Xenomai-core mailing list > Xenomai-core@xxxxxxx > https://mail.gna.org/listinfo/xenomai-core -- Philippe.

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Re: rare brokenness in latency output - FPU bug!

On Wed, 2006-09-20 at 12:20 -0500, Jeff Webb wrote: > Philippe Gerum wrote: > > On Tue, 2006-09-19 at 09:48 -0500, Jeff Webb wrote: > >> Jeff Webb wrote: > >>> I don't have a plain xenomai-2.2.2 kernel handy, but I do have a patched > >>> version. I do not have any problems with switchtest for xenomai-2.2.2 > >>> with the following patches: > >>> > >>> https://mail.gna.org/public/xenomai-help/2006-09/msg00084.html > >>> https://mail.gna.org/public/xenomai-help/2006-09/msg00096.html > >>> > >>> These patches are to nucleus pipe.c and pipe.h / rtai fifo.c and fifo.h. > >>> > >>> I am running an Athlon64 X2 in with 32-bit Fedora Core 5. > >> I have done a couple more tests using xenomai from subversion. Here is a > >> summary of all the results I have so far: > >> > >> xenomai-2.2.2 (patched as described above): switchtest runs > >> svn/xenomai/trunk (r1586): switchtest runs > >> svn/xenomai/trunk (r1589): switchtest runs > >> xenomai-2.2.3 : switchtest fails > >> > >> This is on my Fedora Core 5 (32-bit x86), linux-2.6.17.13 SMP, ipipe-1.3 > >> (except 1.4 for 2.2.3), gcc-4.1.1, Athlon64 X2. > >> > >> Hopefully this will help, > > > > It does, thanks. This confirms Jan's findings that something went wrong > > from #1595. The issue is spotted now, somewhere in the FPU save/restore > > code in the x86 support layer. > > I just rebuilt 2.2.3 with the latest FPU fix patch posted by Philippe: > > https://mail.gna.org/public/xenomai-help/2006-09/msg00157.html > > This appears to fix the FPU switchtest bug on my Athlon64 X2 (2.6 kernel) > machine. Great job! > > Thanks for the hard work, > Gilles did the work actually. I've just relayed it. > Jeff > > _______________________________________________ > Xenomai-core mailing list > Xenomai-core@xxxxxxx > https://mail.gna.org/listinfo/xenomai-core -- Philippe.