Messages in this thread |  | | From | Andy Lutomirski <> | Date | Mon, 20 Oct 2014 21:38:48 -0700 | Subject | Re: [PATCH 0/8] x86: Disentangle the vdso and clean it up |
| |
On Mon, Oct 20, 2014 at 3:41 PM, Andy Lutomirski <luto@amacapital.net> wrote: > On Mon, Oct 20, 2014 at 3:03 PM, H. Peter Anvin <hpa@zytor.com> wrote: >> On 10/20/2014 02:57 PM, Andy Lutomirski wrote: >>> >>> Should I send a replacement for patch 8 or should I let you merge 1-7 >>> and fold this into the followup series? >>> >> >> Please send a replacement. > > Sending in a sec. > > Also, this is really weird. Unless I'm completely nuts, lsl is faster > in KVM than it is on bare metal. This makes me wonder whether > something's suboptimal about the way that the GDT is set up. sgdt is > faster, too. This is Sandy Bridge E, one socket. The difference is > big enough that tracking it down might be a significant win on context > switches. Any hints? >
This may just be a weird cpufreq artifact. I need to improve my test tools :/
--Andy
|  |