Messages in this thread | | | Subject | Re: [PATCH 0/6] perf tools: Add wallclock time conversion support | From | David Ahern <> | Date | Thu, 30 Jul 2020 19:21:54 -0600 |
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On 7/30/20 4:14 PM, peterz@infradead.org wrote: > On Thu, Jul 30, 2020 at 11:39:44PM +0200, Jiri Olsa wrote: > >> The patchset is adding the ability to display TOD/wallclock timestamp >> in 'perf script' output and in 'perf data convert --to-ctf' subcommand, >> so the converted CTF data contain TOD/wallclock timestamps. > > But why? Wallclock is a horrible piece of crap. Why would you want to do > this? >
Same reason I brought this up 9+ years ago: userspace lives on time-of-day, and troubleshooting is based on correlating timestamps from multiple sources. To correlate a perf event to syslog or an application log, we need time-of-day.
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