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

[Jiri Olsa]

On Thu, Jul 30, 2020 at 07:21:54PM -0600, David Ahern wrote:
> 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.

yep, we have a customer that needs to compare data from multiple servers

jirka