Betsie, take a look at http://www.ibm.com/developerworks/linux/linux390/perf/tuning_rec_CPUtime s.html
http://www.ibm.com/developerworks/linux/linux390/perf/tuning_rec_CPUtime s_virtual.html Don't know how which RHEL release it applies to but, "For Linux on System z a new CPU time accounting, called "virtual CPU time accounting" has been implemented from Linux kernel 2.6.11 on, which is based on the virtual System z virtual CPU timer instead of using wall-time as in the tick based CPU accounting: Each CPU has its own CPU timer. The stepping rate of a CPU timer is synchronized with the system TOD (Time-of-Day) clock, but is only incremented when a virtual CPU is backed by a physical CPU. The stpt (Store CPU Timer) instruction is added to the Linux system call path. By storing the CPU timer, the really used CPU time can be calculated for a Linux image." > -------------------------------------------------------- This e-mail, including any attachments, may be confidential, privileged or otherwise legally protected. It is intended only for the addressee. If you received this e-mail in error or from someone who was not authorized to send it to you, do not disseminate, copy or otherwise use this e-mail or its attachments. Please notify the sender immediately by reply e-mail and delete the e-mail from your system. -----Original Message----- > From: Linux on 390 Port [mailto:[email protected]] On Behalf Of > Spann, Elizebeth (Betsie) > Sent: Tuesday, December 30, 2008 1:11 PM > To: [email protected] > Subject: VMSTAT steals > > Hi, > How is the st value displayed in the 2.6 kernel version of vmstat > computed in general terms? I've seen it described as time stolen from > a virtual machine. > Are there differences between the value on a RHEL 5.0 system vs a RHEL > 5.2 system? I've seen references to it being "fixed". ?? > Is the vmstat value similar to the mpstat value? > > Happy New Year. > > Betsie > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [email protected] 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 [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
