Messages in this thread | | | Date | Tue, 28 Mar 2023 09:16:23 -0700 | Subject | Re: [BUG] perf: No samples found when using kcore + coresight | From | Yang Shi <> |
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On 3/28/23 1:59 AM, James Clark wrote: > > On 28/03/2023 01:53, Yang Shi wrote: >> Hi Leo, >> >> Just follow up on this one. Any update? >> > Hi Yang, > > Sorry no update on this yet from me. I was just finishing off > "coresight: Fix CTI module refcount leak by making it a helper device" > which I hope to post in the next day or two and then I will start on this.
Hi James,
Thank you for the update.
> > James > >> Thanks, >> Yang >> >> On Mon, Mar 13, 2023 at 5:36 PM Leo Yan <leo.yan@linaro.org> wrote: >>> On Mon, Mar 13, 2023 at 11:15:44AM -0700, Yang Shi wrote: >>> >>> [...] >>> >>>>> Just a quick summary, here we have two issues: >>>>> >>>>> - With command: >>>>> perf record -e cs_etm/@tmc_etf63/k --kcore --per-thread \ >>>>> -- taskset --cpu-list 1 uname", >>>>> >>>>> perf doesn't enable "text poke" attribution. >>>> No, it enables "text poke" and perf fails to decode coresight trace >>>> data too. It doesn't matter whether "--kcore" is after or before "-e >>>> cs/etm/@tmc_etf63/k". >>> Understand now. Thanks for correction, if so we can ignore this one. >>> >>> Leo
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