[lkml]   [2014]   [Mar]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: perf_fuzzer compiled for x32 causes reboot

* Steven Rostedt <> wrote:

> > Also, this function is called a _LOT_ under certain workloads, I
> > don't know how cheap a CR2 read is, but it had better be really
> > cheap.
> That's a HPA question.

We read CR2 in the page fault hot path, so it's on the top of CPU
architects' minds and it's reasonably optimized. A couple of cycles
IIRC, but would be nice to hear actual numbers.



 \ /
  Last update: 2014-03-01 10:41    [W:0.162 / U:0.184 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site