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

[peterz]

On Fri, Jul 31, 2020 at 08:36:12AM -0700, Andi Kleen wrote:
> > yep, we have a customer that needs to compare data from multiple servers
> 
> It's also needed to correlate over different guests on the same machine.
> This is an important use case.

Both these cases you want to sync up CLOCK_MONOTONIC, using walltime is
just utterly misguided.

What happens if the servers have (per accident or otherwise) different
DST settings, or someone does a clock_setttime() for giggles.

All you really want is a clock that runs at the same rate but is not
subject to random jumps and user foibles.