On 10/18/07, Bill Sommerfeld <[EMAIL PROTECTED]> wrote: > that sounds like a somewhat mangled description of the cross-calls done > to invalidate the TLB on other processors when a page is unmapped. > (it certainly doesn't happen on *every* update to a mapped file).
I've seen systems running Veritas Cluster & Oracle Cluster Ready Services idle at about 10% sys due to the huge number of monitoring scripts that kept firing. This was on a 12 - 16 CPU 25k domain. A quite similar configuration on T2000's had negligible overhead. Lesson learned: cross-calls (and thread migrations, and ...) are much cheaper on systems with lower latency between CPUs. -- Mike Gerdts http://mgerdts.blogspot.com/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
