[PATCH] cpufreq: powernv: Export frequency throttle state of the chip through sysfs

Michael Ellerman mpe at ellerman.id.au
Thu Aug 27 19:31:30 AEST 2015

On Thu, 2015-08-27 at 14:43 +0530, Shilpasri G Bhat wrote:
> Create a sysfs 'throttle' attribute per-chip(per-numa-node) to reflect
> the throttle state of the chip. The usersapce programs can poll on
> this attribute to keep an eye on the throttle state. Currently we
> print a log message to notify the user of throttling event. The
> performance-sensitive applications can monitor the throttle state
> using this attribute.

Performance sensitive applications can *poll* on a sysfs file, which does a
loop over all chips and potentially spams the console with pr_crit() messages ?

That does not sound like a recipe for success.

What problem are we actually trying to solve here?


More information about the Linuxppc-dev mailing list