I know that the folks at PKWare had their own way of keeping stats on CPACF prior to the CPU Measurement Facility. I am sure there were others.. they just always come to mind first.
Rob Schramm Rob Schramm Senior Systems Consultant Imperium Group On Tue, Jan 28, 2014 at 1:36 PM, Greg Boyd <[email protected]> wrote: > Unfortunately, the RMF Crypto Hardware Activity report will be focused on > the utilization of the crypto cards (the Crypto Express cards), not the > CPACF. The CPACF simply provides some additional instructions that perform > crypto operations (Cipher Message, Compute Message Digest, etc.). And just > as you can't break out the CPU utilization of a single Move Character or > Shift Logical instruction, you can't break out the CPU utilization of these > instructions either. > > That said, starting with the z10 machines we did make the CPU Measurement > Facility available. This facility gives you the ability to 'count' > instructions and that includes many of the crypto instructions. John Burg > has done presentations on the use of the Measurement Facility at Share and > zExpo/zTech University. You can access at least one version of the > presentation on the IBM ATS TechDocs website ( > http://www.ibm.com/support/techdocs/atsmastr.nsf/WebIndex/TC000005). > > I should point out that the Measurement Facility captures data at the LPAR > level. In contrast, the RMF Crypto Hardware Activity report is for the > entire CEC, and thus the entire crypto card. The point being that you have > to be careful how you interpret the reports (both of them). > > John has experimented with using the data from the counters to calculate > the CPU consumption of the various instructions. If nothing else, you > should probably monitor these counters (at least for the crypto > instructions) so you can develop trend lines and monitor the use of crypto > at that level. > > Greg Boyd > IBM Advanced Technical Support > Supporting Crypto on System z > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
