[SPE] Skip SAMPLE events to avoid unsupported PERF_SAMPLE_REGS_USER #259
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This patch avoids reading PERF samples that is not relavent. We only need AUXTRACE events for SPE data. This filtering is similar to what is already done in other places.
dhoekwater
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Jan 5, 2026
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dhoekwater
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One minor comment, but LGTM.
| // Read the perf data file | ||
| quipper::PerfReader reader; | ||
| // Skip SAMPLE events to avoid unsupported PERF_SAMPLE_REGS_USER | ||
| // We only need AUXTRACE events for SPE data |
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SAMPLE events aren't needed for single-process SPE profiles, but we do use them to attribute SPE samples to the right PID when collecting system-wide profiles (see https://github.com/google/autofdo/blob/master/spe_tid_pid_provider.h).
It looks like the SimpleSpeDataSampleReader only operates on single-process SPE profiles, so you still don't need SAMPLE events, but it might be worth calling out that you'd need these events if you want to add support for system-wide SPE profiles.
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This patch avoids reading PERF samples that is not relavent. We only need AUXTRACE events for SPE data. This filtering is similar to what is already done in other places.