Alexander Shishkin <[email protected]> writes: > It kinda does make a difference: inside PSB+ you get a TSC packet, which > carries the tsc timestamp as a payload, so, with the current behavior, > since you'll get one of those at every event schedule-in, you'll have > many more time synchronization points with the perf stream, but when the > default changes, suddenly your timestamps way further apart and the > decoder needs to put in additional guesswork to correlate those MMAP > events in the perf stream with the PT trace.
I spoke hastily, TSC packets will be generated on every schedule-in (as well as other packets that normally come in PSB+) regardless of the actual PSB, so scratch the above. Let me replace the above with a smaller patch. Regards, -- Alex -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
