On Sat, Sep 13, 2014 at 9:02 AM, Hamid Reza Khaleghzadeh <khaleghza...@gmail.com> wrote: > Hi all, > > I have a question about Umask value in Core 2 Duo processors. As you know, > there is an umask value for each event number. I have considered two events > from "Non-Architectural Performance Events in Core Duo Processors": > (03H: LD_Blocks, Umask 00H) and > (05H: Misalign_Mem_Ref, Umask: 00H). > > A multi-threaded application has been executed as following with different > events: > sudo perf stat -r 5 -e r0300 -a my/a > 21,242,257,626 r0300 > ( +- 1.41% ) > sudo perf stat -r 5 -e r03 -a my/a > 0 r03 > You have the umask snd event code ordering wrong. Code 0x3 umask 0x00: r0003
The encoding is: rXXYY where YY is event code, XX umask code > As you can see, output of 0300H is not the same as value of 03H > On the other hand, I have done this experiment for event 05H, and results > are shown at bellow: > > sudo perf stat -r 5 -e r0500 -a my/a > 0 r0500 > > sudo perf stat -r 5 -e r05 -a my/a > 288,018 r05 ( > +- 27.30% ) > > According to the obtained results, It can be found that event 03 does not > work properly without determining of Umask value (00H). In contrast, event > 05H are not able to count correctly whit Umask 00H. Now, Could you tell me > why this happens? > > ------------------------------------------------------------------------------ > Want excitement? > Manually upgrade your production database. > When you want reliability, choose Perforce > Perforce version control. Predictably reliable. > http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk > _______________________________________________ > perfmon2-devel mailing list > perfmon2-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/perfmon2-devel > ------------------------------------------------------------------------------ Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk _______________________________________________ perfmon2-devel mailing list perfmon2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
