On Tue, 2003-07-01 at 20:46, Manuel Krause wrote: > > > Setting HZ=1000 (from 100) in linux/include/asm/param.h give me very > > impressive latency boost. 2.4.21-rc1-jam1 (-rc1aa1) > > Just tried this HZ=1000 setting, too. > > (With the following patches "only": data-logging, search_reada-4 and > rml-preempt on 2.4.21-final, and AA.00_nanosleep-6.diff (THAT ONE > decreased my VMware+system CPU idle usage in these circumstances by > approx. 1/2 [from 25% to approx. 12.5%] ). >
Some userspace tools depend on the HZ value. It's clear the io-stalls-7 patch can't be the final one, I need to add userspace knobs to tune things towards latency or multi-writer throughput (basically server or desktop workloads). -chris
