Re: [PATCH 0/6] perf tools: Add wallclock time conversion support

[David Ahern]

On 7/30/20 4:14 PM, peterz@xxxxxxxxxxxxx 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.