Markus, On Jan 30, 2008 1:52 PM, Metzger, Markus T <[EMAIL PROTECTED]> wrote: > >From: stephane eranian [mailto:[EMAIL PROTECTED] > >Sent: Mittwoch, 30. Januar 2008 12:01 > > >You can get information about the perfmon2 project at: > >http://perfmon2.sf.net > > I downloaded your patch for 2.6.23 and cloned your git repository. > > From a first glance, it looks like there is indeed a lot of overlap. > > > >I would like to take a look at your patches. Where can I get them? > > You can find the changes in the mm branch of the x86 git. Do they keep > the patches there, somewhere, as well?
I will take a look at what you have in -mm git. > > You should get the best overview if you look at arch/x86/kernel/ds.c, > include/asm-x86/ds.h, include/asm-x86/ptrace-abi.h, and > arch/x86/kernel/ptrace.c or simply grep for BTS. > OK. > > >My understanding at this point is that we would need to coordinate > >access to the > >DS_AREA. It would likely have to be mutually exclusive access. > > From a brief look at your patch, I would say that we should rather > combine the configuration and collection part. They are very similar. > That's probably fine too. I'll let you know once I know more about your code. > We might still want to provide different interfaces on top of it. > In particular, I think the ptrace interface is most appropriate for > debuggers. I agree. > >Now, there is some preliminary perf. MSR allocator in the kernel. > >However, it does not know > >of all available MSRs out there. It focuses on the counters mostly. > >Perfmon, oprofile and > >the NMI watchdog use it. I think it could be generalized to other MSR > >(non-contiguous). > > > >I would be happy to work with you in refining this MSR allocator. > > > Are you planning to get the perfmon patch into the kernel? Or do you > want it to remain a separate patch? The former, i.e., trying to merge with mainline. > > In the first case, we should try to merge the features. In the second > case, refining the MSR allocator would probably be best. > > -- 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/
