+ LKML On Sat, Oct 24, 2020 at 8:44 AM George Prekas <preka...@amazon.com> wrote: > > The header of a perf sample has a u16 field for the size of the record. > On the other hand, a PERF_SAMPLE_RAW has a u32 field for its size. > > I've written a test perf driver that creates large raw samples and it > doesn't work correctly (as expected). For example, perf record fails with: > > Can't parse sample, err = -14 > 0x4688 [0x8]: failed to process type: 68 [Bad address] > > Is this expected? Is the developer of the perf driver responsible to > make sure that each perf record does not exceed 64KB in size? If that's > the case, I am wondering why the raw sample has a u32 for its size.
For the large records, you may consider an auxtrace interface. Thanks Namhyung
