lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Sun, 6 Apr 2008 09:37:31 -0700 (PDT) From: dean gaudet <dean@...tic.org> To: Jack Harvard <jack.harvard@...glemail.com> cc: linux-kernel@...r.kernel.org Subject: Re: How does Linux measure CPU frequency? linux knows what style of cpu it is running on and uses non-portable techniques to read the time-stamp counter. lmbench uses some really nice tricks to estimate the cpu frequency in a portable manner... all it requires is that at least two of the N code sequences it times take a co-prime number of cycles. -dean On Sun, 6 Apr 2008, Jack Harvard wrote: > Hi, > > I want to find out how Linux calibrates the frequency of CPUs, and > want to compare with the way how lmbench measures processor frequency. > I had a thorough google search of this topic but didn't get too much > useful results. > > Thanks a lot, > Jack > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists