Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt

randy_dunlap
2005-07-09T20:30:56Z

On Sat, 09 Jul 2005 15:16:01 -0400 Lee Revell wrote:

| On Sat, 2005-07-09 at 12:12 -0700, Andrew Morton wrote:
| > Lee Revell <rlrevell@joe-job.com> wrote:
| > >
| > > > This is not a userspace visible thing really with few exceptions, and
| > > > well people can select the one they want, right?
| > >
| > > Then why not leave the default at 1000?
| >
| > Because some machines exhibit appreciable latency in entering low power
| > state via ACPI, and 1000Hz reduces their battery life. By about half,
| > iirc.
| >
|
| Then the owners of such machines can use HZ=250 and leave the default
| alone. Why should everyone have to bear the cost?

indeed, why should everyone have to have 1000 timer interrupts per second?

---
~Randy