Messages in this thread | | | Date | Wed, 10 Dec 2014 14:28:37 +0200 | From | Adrian Hunter <> | Subject | Re: [PATCH V2 02/22] perf evlist: Add initial support for mmapping an Instruction Trace buffer |
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On 09/12/14 15:24, Arnaldo Carvalho de Melo wrote: > Em Wed, Nov 26, 2014 at 03:11:16PM +0200, Adrian Hunter escreveu: >> On 25/11/14 18:57, Jiri Olsa wrote: >>> On Thu, Nov 20, 2014 at 03:23:08PM +0200, Adrian Hunter wrote: >>> >>> SNIP >>> >>>> + bool per_cpu __maybe_unused) >>>> +{ >>>> +} >>>> + >>>> static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) >>>> { >>>> if (evlist->mmap[idx].base != NULL) { >>>> @@ -731,6 +759,7 @@ static void __perf_evlist__munmap(struct perf_evlist *evlist, int idx) >>>> evlist->mmap[idx].base = NULL; >>>> evlist->mmap[idx].refcnt = 0; >>>> } >>>> + itrace_mmap__munmap(&evlist->mmap[idx].itrace_mmap); >>>> } >>>> >>>> void perf_evlist__munmap(struct perf_evlist *evlist) >>>> @@ -758,6 +787,7 @@ static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) >>>> struct mmap_params { >>>> int prot; >>>> int mask; >>>> + struct itrace_mmap_params itrace_mp; >>>> }; >>>> >>>> static int __perf_evlist__mmap(struct perf_evlist *evlist, int idx, >>>> @@ -788,6 +818,10 @@ static int __perf_evlist__mmap(struct perf_evlist *evlist, int idx, >>>> return -1; >>>> } >>>> >>>> + if (itrace_mmap__mmap(&evlist->mmap[idx].itrace_mmap, >>>> + &mp->itrace_mp, evlist->mmap[idx].base, fd)) >>>> + return -1; >>>> + >>> >>> so the itrace mmap is mmaped with right after event mmap for event fd..? >> >> The AUX area support is not implemented yet. The AUX mmap size and offset >> are set through the mmap page via aux_offset and aux_size. > >>From a quick look the user bits looks nicely done, step by step > introducing stuff, but I would like to try it all together, where can I > get the kernel bits so that I can try to find some machine where to test > the whole thing?
Thanks for looking at the patches.
I am making a small change at the moment, so I will send a V3 and an updated link to a git tree with all the patches - hopefully tomorrow.
> > - Arnaldo > >>> is there any latest version of kernel changes, so I could check with >>> kernel's perf_mmap? hum.. or you just use the same mmap? >> >> I re-based and pushed to: >> >> git://git.infradead.org/users/ahunter/linux-perf.git >> >> The missing AUX bits are added in this patch: >> >> http://git.infradead.org/users/ahunter/linux-perf.git/commitdiff/f1be40371b5600a5c4a20f88adff9595bdf5e7ec > >
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