Messages in this thread | | | Date | Wed, 6 Oct 2021 17:51:24 +0800 | From | Leo Yan <> | Subject | Re: [PATCH 4/5] perf arm-spe: Implement find_snapshot callback |
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On Wed, Oct 06, 2021 at 10:35:20AM +0100, German Gomez wrote:
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> > So simply say, I think the head pointer monotonically increasing is > > the right thing to do in Arm SPE driver. > > I will talk to James about how we can proceed on this.
Thanks!
> >> (note that the patch will skip the wrap-around detection if this is the > >> case, > >> in order to handle both cases in the userspace perf tool). > > Almost agree, I read multiple times but have no idea what's the > > "both cases" in the last sentence. > > Apologies for the later part was not clear. What I meant to say was that > in the original patch for cs-etm, it seemed to handle both cases where > AUX head might be monotonically and non-monotonically increasing, so we > applied the same for the Arm SPE patch.
No worries, thanks for explanation.
Leo
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