On Wed, 6 Jan 2016 01:22:13 +0100 "Steinar H. Gunderson" <[email protected]> wrote:
> On Tue, Jan 05, 2016 at 04:06:03PM -0800, Stephen Hemminger wrote: > > The expensive part is often having to save and restore all the state in > > registers and other bits on context switch. > > Are you sure? There's not really all that much state to save, and all I've > been taught before says the opposite. > > Also, I've never ever seen the actual context switch turn up high in a perf > profile. Is this because of some sampling artifact? Yes, especially with Intel processors getting more and more SSE/floating point registers. _______________________________________________ Bloat mailing list [email protected] https://lists.bufferbloat.net/listinfo/bloat
