Messages in this thread | | | Date | Sat, 24 Oct 2009 16:19:03 +0200 | From | Frederic Weisbecker <> | Subject | Re: [GIT PULL v2] hw-breakpoints: Rewrite on top of perf events |
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On Sat, Oct 24, 2009 at 04:16:52PM +0200, Frederic Weisbecker wrote: > Hi all, > > This is the v2 of the hw-breakpoints API rewrite on top of perf events. > You can find the previous version here: > http://lwn.net/Articles/351922/ > > Changes in v2: > > - Follow the perf "event " rename > - The ptrace regression have been fixed (ptrace breakpoint perf events > weren't released when a task ended) > - Drop the struct hw_breakpoint and store generic fields in > perf_event_attr. > - Separate core and arch specific headers, drop > asm-generic/hw_breakpoint.h and create linux/hw_breakpoint.h > - Use new generic len/type for breakpoint > - Handle off case: when breakpoints api is not supported by an arch > - Use proper in-kernel perf api provided by Arjan. > > There are still a lot of things that need to be cleaned, simplified, > improved (ptrace side, the bp api, etc....) I guess these things can > be done incrementally if you agree. > > I've also tried to get an arch-independent api. Generic fields for > breakpoints are stored in perf_event_attr structure (type, len, addr). > This needs to be discussed and improved before it becomes a perf > userspace ABI. We need to find a generic enough structure to host > the breakpoints parameters, something that can better fit to most arch > (handling breakpoint ranges in powerpc, etc...). > > Thanks. > > --- > > The following patchset are available in the git repository at: > > git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git > perfevents/hw-breakpoint
BTW, this is a branch based on tip:tracing/hw_breakpoint with tip:perf/core merged inside.
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