/proc/sys/kernel/HZ must be a SLES thing, don't see that on RHEL. Red Hat folks have ideas on where to find the equivalent?
[ts62...@lsdezvm01 kernel]$ pwd /proc/sys/kernel [ts62...@lsdezvm01 kernel]$ ls . domainname msgmnb panic_on_oops random tainted .. exec-shield msgmni panic_on_unrecovered_nmi real-root-dev threads-max acct exec-shield-randomize ngroups_max pid_max sem userprocess_debug cad_pid hostname osrelease print-fatal-signals shmall version cap-bound hotplug ostype printk shmmax wake_balance core_pattern hz_timer overflowgid printk_ratelimit shmmni core_uses_pid modprobe overflowuid printk_ratelimit_burst suid_dumpable ctrl-alt-del msgmax panic pty sysrq -Tom -----Original Message----- From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Mark Post Sent: Monday, January 04, 2010 3:40 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: x86 to z CPU comparison for calculating IFLs needed >>> On 1/4/2010 at 3:53 PM, Stewart Thomas J <stewartthom...@johndeere.com> >>> wrote: > Regarding jiffies, we found this earlier: > http://linux.die.net/man/7/time > "On x86 the situation is as follows: on kernels up to and including > 2.4.x, HZ was 100, giving a jiffy value of 0.01 seconds; starting with > 2.6.0, HZ was raised to 1000, giving a jiffy of 0.001 seconds; since > kernel 2.6.13, the HZ value is a kernel configuration parameter and > can be 100, 250 (the default) or 1000, yielding a jiffies value of, > respectively, 0.01, 0.004, or 0.001 seconds. " > > -- anyone know if that holds the same on z hardware implementations? Check the value in /proc/sys/kernel/HZ on a particular system to make sure. On my SLES10 SP3 guest, it's 100, and on my SLED10 SP3 laptop, it's 250. Mark Post ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
