[go: up one dir, main page]
|
|
Log in / Subscribe / Register

Implementing virtual system calls

Implementing virtual system calls

Posted Oct 17, 2014 5:04 UTC (Fri) by kjp (guest, #39639)
In reply to: Implementing virtual system calls by ntl
Parent article: Implementing virtual system calls

I was just going to ask that. jiffies is obviously not high resolution enough for gettimeofday. can multiple cpus still cause issues with rdtsc? or is the monotonic guarantee single cpu only?

to post comments

TSC and multiple CPUs

Posted Oct 17, 2014 15:49 UTC (Fri) by ntl (subscriber, #40518) [Link]

I think some older CPUs have issues with TSC sync, which the kernel detects and works around by using a different clocksource like HPET (and the vDSO on x86 has different routines for different clocksources).


Copyright © 2026, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds