On Mon, Feb 1, 2010 at 5:45 PM, Peter Zijlstra <pet...@infradead.org> wrote: > On Mon, 2010-02-01 at 17:14 +0100, Stephane Eranian wrote: > >> Using perfmon on Core 2 on a 10s noploop: >> >> pfmon -eunhalted_reference_cycles,unhalted_core_cycles,cpu_clk_unhalted:bus >> noploop 10 >> noploop for 10 seconds >> 23869090125 UNHALTED_REFERENCE_CYCLES >> 23849336873 UNHALTED_CORE_CYCLES >> 2652122099 CPU_CLK_UNHALTED:BUS > > Weird, I used: > > while :; do :; done & > while :; do :; done & > while :; do :; done & > while :; do :; done & > perf stat -a -e r013c -e r013c sleep 4 > killall bash > > Which gives: > > Performance counter stats for 'sleep 4': > > 244235699509090 raw 0x13c > 244235695558036 raw 0x13c > Strange. I am running mine on a Q6600. What's yours?
> 4.005485333 seconds time elapsed > > And verified it used fixed counter 2 and general purpose counter 0 using > sysrq-p. > > [523417.108402] CPU#0: gen-PMC0 ctrl: 000000000053013c > [523417.108403] CPU#0: gen-PMC0 count: 000000ff80019948 > [523417.108405] CPU#0: gen-PMC0 left: 000000007fffffff > [523417.108407] CPU#0: gen-PMC1 ctrl: 0000000000000000 > [523417.108409] CPU#0: gen-PMC1 count: 0000000000000000 > [523417.108411] CPU#0: gen-PMC1 left: 000000007fffb8a8 > [523417.108412] CPU#0: fixed-PMC0 count: 0000000000000000 > [523417.108414] CPU#0: fixed-PMC1 count: 0000000000000000 > [523417.108416] CPU#0: fixed-PMC2 count: 0000010db1db2117 > > Using -linus, since that doesn't have any of the recent constraint > patches in that would avoid us from using fixed-PMC2. > > -- Stephane Eranian | EMEA Software Engineering Google France | 38 avenue de l'Opéra | 75002 Paris Tel : +33 (0) 1 42 68 53 00 This email may be confidential or privileged. If you received this communication by mistake, please don't forward it to anyone else, please erase all copies and attachments, and please let me know that it went to the wrong person. Thanks ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com _______________________________________________ perfmon2-devel mailing list perfmon2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
