Bjorn,
On Wed, Jun 20, 2007 at 02:59:33PM -0700, Stephane Eranian wrote: > Bjorn, > > I ran into one issue related with the new allocator. > > In the case of a Core 2 Duo processor, the PMU implements more > than just basic counters. In particular it supports fixed counters > and PEBS where both use another set of MSRs. Those are not within > a 66 bit distance from MSR_ARCH_PERFMON_EVNTSEL0. Thus the allocator > fails with an assertion. > > I do know that perfmon is the only consumer of those extended > features TODAY. Yet I think we need to define the allocator such > that it can work with other "distant" MSRs as well. > I think that a workaround for this issue could be for the allocator to grant the requests for registers outside of the range, i.e., register that it does not see/manage. > On Wed, Jun 20, 2007 at 08:33:15PM +0200, Bj?rn Steinbrink wrote: > > On 2007.06.20 15:01:02 +0200, Andi Kleen wrote: > > > > > > > Once this is fixed (which is what Bjorn did), then I will agree with > > > > you. > > > > For this, the allocator needs to be able to probe the CPU and initialize > > > > its own data structures. > > > > > > Ok that sounds reasonable. Please someone send a patch that does only > > > that. > > > > OK, here come the bugfixes without any restructuring. The first patch > > enables unconditional probing of the watchdog. The second makes the > > perfmon nmi watchdog reserve the correct perfctr/evntsel. > > > > Björn > > > > ------------------------------------------------------------------------- > > This SF.net email is sponsored by DB2 Express > > Download DB2 Express C - the FREE version of DB2 express and take > > control of your XML. No limits. Just data. Click to get it now. > > http://sourceforge.net/powerbar/db2/ > > _______________________________________________ > > oprofile-list mailing list > > [EMAIL PROTECTED] > > https://lists.sourceforge.net/lists/listinfo/oprofile-list > > -- > > -Stephane > _______________________________________________ > perfmon mailing list > [EMAIL PROTECTED] > http://www.hpl.hp.com/hosted/linux/mail-archives/perfmon/ -- -Stephane - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
