Hi Leo,
Many thanks for your comments.
On 04/10/2021 13:27, Leo Yan wrote:
Hi German,
On Thu, Sep 30, 2021 at 01:26:15PM +0100, German Gomez wrote:
[...]
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.
(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.
Please let me know if anything is not clear.
Thanks, Leo
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/tool...