Messages in this thread | | | Date | Fri, 22 Jun 2012 09:18:34 -0600 | From | David Ahern <> | Subject | Re: [RFC/PATCHSET 0/8] perf tools: Minimal build without libelf dependency (v2) |
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On 6/22/12 9:05 AM, Namhyung Kim wrote: > Hi Peter, > > 2012-06-22 (금), 11:47 +0200, Peter Zijlstra: >> On Fri, 2012-06-22 at 14:37 +0900, Namhyung Kim wrote: >>> And then I realized that the perf record needs to know about the >>> build-id's anyway. :( So I implemented a poor man's version of elf >>> parser only for parsing the build-id info. >> >> Why? the very first versions didn't know about any of that nonsense :-) >> It works just fine as long as you don't go change binaries around. >> >> That said, you did the work already, so no objection, just saying >> builtids aren't that important. > > I'm not sure I understood you correctly. But 'perf record' needs to know > about the build-id's to save them to perf.data for 'perf report' later. > And 'perf archive' also needs to know about them to select necessary > binaries for the session. >
And build-id's are not required for report (-B option for record).
Also, the intent is for a small footprint binary for embedded systems. On such a system I would expect binaries and libraries to be stripped, so no point in running perf-archive.
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