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SubjectRe: [PATCH v2] perf test: Add ARM SPE system wide test
On Fri, Jun 17, 2022 at 03:38:40PM +0800, Leo Yan wrote:
> Hi Namhyung,
>
> On Thu, Jun 16, 2022 at 04:05:46PM -0700, Namhyung Kim wrote:
>
> [...]
>
> > +arm_spe_system_wide_test() {
> > + echo "Recording trace with system-wide mode $perfdata"
> > + perf record -o ${perfdata} -e arm_spe// -a \
> > + -- dd if=/dev/zero of=/dev/null count=100000 > /dev/null 2>&1
> > +
> > + if [ $? != 0 ]; then
> > + arm_spe_report "SPE system-wide testing" 2
> > + return
> > + fi
>
> I am awared the root permission issue after I saw German's suggestion.
>
> If the snapshot test is passed, no matter the system wide test is passed
> or not, we will always return 0 for 'passed' result. But we might miss
> to capture the system-wide testing failure.
>
> How about use 'dummy' event to verіfy the root permission?
> (actually I referred to intel-pt test):
>
> perf record -o ${tmpfile} -B -N --no-bpf-event -e dummy:u -a true 2>&1 >/dev/null

Sorry for typo, s/tmpfile/perfdata/

> if [ $? != 0 ]; then
> arm_spe_report "SPE system-wide testing" 2
> return
> fi
>
> perf record -o ${perfdata} -e arm_spe// -a \
> -- dd if=/dev/zero of=/dev/null count=100000 > /dev/null 2>&1

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