On Sun, Oct 17, 2010 at 6:07 PM, Sam Siegel <[email protected]> wrote: > > On Sun, Oct 17, 2010 at 5:44 PM, William H. Blair <[email protected]>wrote: > >> Sam Siegel explains: >> >> <--snip-->
> It is extremely unlikely that you have accidentally stumbled upon the >> mechanism to make this little bit of magic happen. It is always possible >> that there is a bug in z/OS and your SRB is, in fact, being dispatched on >> a >> zIIP. But I seriously doubt that. >> > > Agreed, it could be a bug. But I've seen this in v1r9 and v1r10. I'm not > saying that there is certainty that the SRB is dispatched to a zIIP all of > the time. But it seems to happen extremely regularly. > > <--snip--> The SRB was modified to do a loop of about 420,000,000 iterations. Inside the loop was a STAP followed by a CLI to see which CPU was being used. Based on the CPU, different counters were incremented. There are 2 CPUs on the system. The counter for cpu 0 is 44,300,650. The counter for cpu 1 is 375,129,750. Below is the output from D M=CPU IEE174I 06.33.02 DISPLAY M FRAME 1 F E SYS=xxxx PROCESSOR STATUS ID CPU SERIAL 00 + 02abcd9988 01 +I 12abcd9988 System name and serial numbers have been masked. <--snip--> > >> -- >> WB >> > >
