Re: Intel Goldmont default event
Andi Kleen <[email protected]>
| Newsgroups | gmane.linux.oprofile |
|---|---|
| Message-ID | <[email protected]> |
On Fri, Sep 23, 2016 at 01:35:54PM +0200, Michael Petlan wrote: > Hi all, > > when testing oprofile on an Intel Goldmont machine, I have found out > that the default event cpu_clk_unhalted returns always zero. Thus, I > checked the configuration and Intel SDM, and I think there must be a > mistake. > > According to the Intel SDM, table 19-24, the event is 0x3c as usual. > It has two unit masks (0x00 (core_p) and 0x01 (ref)). With this, the > event starts giving reasonable results. > > The current configuration which is coded in oprofile is not even in > the SDM tale 19-24, so it is expectable that the following will give > zero value: > > perf stat -e cpu/event=0x00,umask=0x02/ ls > > Please consider applying the attached patch. Looks good. Thanks for fixing. -Andi ------------------------------------------------------------------------------