On Wed, Apr 04, 2018 at 05:53:23PM +0300, Alexander Shishkin wrote: > It has been pointed out to me many times that it is useful to be able > to switch off AUX records to save the bandwidth for records that actually > matter, for example, in AUX overwrite mode. > > The usefulness of PERF_RECORD_AUX is in some of its flags, like the > TRUNCATED flag that tells the decoder where exactly gaps in the trace are. > The OVERWRITE flag, on the other hand will be set on every single record > in overwrite mode. However, a PERF_RECORD_AUX[flags=OVERWRITE] is > generated on every target task's sched_out, which over time adds up to > a lot of useless information. > > If any folks out there have userspace that depends on a constant stream of > OVERWRITE records for a good reason, they'll have to let us know. > > Signed-off-by: Alexander Shishkin <[email protected]> > Cc: Markus Metzger <[email protected]> > Cc: Adrian Hunter <[email protected]>
This one seems to be slipping through the cracks. Cheers, -- Alex
