On Mon, Feb 1, 2010 at 5:47 PM, Peter Zijlstra <pet...@infradead.org> wrote: > On Mon, 2010-02-01 at 17:12 +0100, Stephane Eranian wrote: >> > btw, I've also added the below, from what I can make from the docs >> fixed >> > counter 2 is identical to arch perf event 0x013c, as per table A-1 >> and >> > A-7. Both are called CPU_CLK_UNHALTED.REF, except for Core2, where >> > 0x013c is called CPU_CLK_UNHALTED.BUS. >> > >> >> If you measure 0x013c in a generic counter or in fixed counter 2 >> it will count the same thing but not at the same rate. >> This is true on Core2, Atom, Nehalem, Westmere. The ratio is the >> clock/bus ratio. > > But for Nehalem and Westmere event 0x3c umask 0x01 is referred to as > CPU_CLK_UNHALTED.REF_P (Tables A-2 and A-4), > _P means programmable (counter).
on my NHM: pfmon -v -eunhalted_core_cycles,unhalted_reference_cycles,cpu_clk_unhalted:ref_p ./noploop 10 [FIXED_CTRL(pmc16)=0xaa0 pmi0=1 en0=0x0 any0=0 pmi1=1 en1=0x2 any1=0 pmi2=1 en2=0x2 any2=0] UNHALTED_CORE_CYCLES UNHALTED_REFERENCE_CYCLES [PERFEVTSEL0(pmc0)=0x51013c event_sel=0x3c umask=0x1 os=0 usr=1 anythr=0 en=1 int=1 inv=0 edge=0 cnt_mask=0] CPU_CLK_UNHALTED noploop for 10 seconds 29292225749 UNHALTED_CORE_CYCLES 29292249954 UNHALTED_REFERENCE_CYCLES 1331465398 CPU_CLK_UNHALTED:REF_P REF_P runs at 133MHz. Core at 2.93GHz. > Fixed Counter 2 is referred to as CPU_CLK_UNHALTED.REF (Table A-7). > > For Core2 and Atom (Table A-8, A-9) it is called CPU_CLK_UNHALTED.BUS, > for these entries there is talk about a fixed ratio. > > -- 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
