On Tue, Aug 23, 2011 at 05:06:03PM -0400, H. Peter Anvin wrote: > On 08/23/2011 01:56 PM, Borislav Petkov wrote: > > > > But no, I don't think the difference has disappeared - to the contrary, > > AFAICT, the intention is for SYSCALL to be the fastest way to do > > syscalls on x86 due to diminished number of segment checks etc. INT80 > > is legacy, slower, etc. I believe Andy measured a similar situation on > > Sandy Bridge with SYSCALL having latencies in the tens of nsecs range > > and INT80 being much slower. Ingo also measured a similar situation > > where the latency gap between the two on Intel is even bigger. > > > > Sandy Bridge doesn't have SYSCALL32 at all. It has SYSENTER and SYSCALL64.
Yeah, I was talking about SYSCALL in general. -- Regards/Gruss, Boris. Advanced Micro Devices GmbH Einsteinring 24, 85609 Dornach GM: Alberto Bozzo Reg: Dornach, Landkreis Muenchen HRB Nr. 43632 WEEE Registernr: 129 19551 ------------------------------------------------------------------------------ EMC VNX: the world's simplest storage, starting under $10K The only unified storage solution that offers unified management Up to 160% more powerful than alternatives and 25% more efficient. Guaranteed. http://p.sf.net/sfu/emc-vnx-dev2dev _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
