Messages in this thread | | | Date | Mon, 18 Jan 2021 18:46:57 -0800 | From | Andi Kleen <> | Subject | Re: [PATCH] perf/core: Emit PERF_RECORD_LOST for pinned events |
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> > I don't think I object to having an even in the stream, but your LOST > > event is unfortunate in that it itself can get lost when there's no > > space in the buffer (which arguably is unlikely, but still). > > > > So from that point of view, I think overloading LOST is not so very nice > > for this. > > But anything can get lost in case of no space. > Do you want to use something other than the LOST event?
Could always reserve the last entry in the ring buffer for a LOST event, that would guarantee you can always get one out.
-Andi
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