[lkml]   [2000]   [Mar]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: bogo-bogomips
Philipp Rumpf wrote:
> On Fri, Mar 17, 2000 at 11:28:37PM +1100, Andrew Morton wrote:
> > 2.3.99-pre1 is getting my bogomips wrong:
> No it's not. It's calculating them in a different way (the rdtsc-
> based __delay()) than older kernels did; this was necessary to
> avoid problems with new / planned CPUs that have unexpected delay
> loop behaviour (for example, Laptop CPUs that run at different
> clock speeds when they are using AC rather than battery).

Actually it won't correct for current laptop CPUs that vary the clock
speed -- the tsc speed also varies.

It will probably correct for future laptop CPUs though, such as (no
surprise) the Transmeta one.

-- Jamie

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:57    [W:0.257 / U:7.068 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site