awk sum entire string Post: 302771671

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LEARN ABOUT FREEBSD

pmc.xscale

PMC.XSCALE(3)						   BSD Library Functions Manual 					     PMC.XSCALE(3)

NAME

     pmc.xscale -- measurement events for Intel XScale family CPUs

LIBRARY

     Performance Counters Library (libpmc, -lpmc)

SYNOPSIS

     #include <pmc.h>

DESCRIPTION

     Intel XScale CPUs are ARM CPUs based on the ARMv5e core.

     Second generation cores have 2 counters, while third generation cores have 4 counters.  Third generation cores also have an increased number
     of PMC events.

     Intel XScale PMCs are documented in 3rd Generation Intel XScale Microarchitecture Developer's Manual, May 2007.

   Event Specifiers (Programmable PMCs)
     Intel XScale programmable PMCs support the following events:

     IC_FETCH
	     External memory fetch due to L1 instruction cache miss.

     IC_MISS
	     Instruction cache or TLB miss.

     DATA_DEPENDENCY_STALLED
	     A data dependency stalled

     ITLB_MISS
	     Instruction TLB miss.

     DTLB_MISS
	     Data TLB miss.

     BRANCH_RETIRED
	     Branch instruction retired (executed).

     BRANCH_MISPRED
	     Branch mispredicted.

     INSTR_RETIRED
	     Instructions retired (executed).

     DC_FULL_CYCLE
	     L1 data cache buffer full stall.  Event occurs on every cycle the condition is present.

     DC_FULL_CONTIG
	     L1 data cache buffer full stall.  Event occurs once for each contiguous sequence of this type of stall.

     DC_ACCESS
	     L1 data cache access, not including cache operations.

     DC_MISS
	     L1 data cache miss, not including cache operations.

     DC_WRITEBACK
	     L1 data cache write-back.	Occurs for each cache line that's written back from the cache.

     PC_CHANGE
	     Software changed the program counter.

     BRANCH_RETIRED_ALL
	     Branch instruction retired (executed).  This event counts all branch instructions, indirect or direct.

     INSTR_CYCLE
	     Count the number of microarchitecture cycles each instruction requires to issue.

     CP_STALL
	     Coprocessor stalled the instruction pipeline.

     PC_CHANGE_ALL
	     Software changed the program counter (includes exceptions).

     PIPELINE_FLUSH
	     Pipeline flushes due to mispredictions or exceptions.

     BACKEND_STALL
	     Backend stalled the instruction pipeline.

     MULTIPLIER_USE
	     Multiplier used.

     MULTIPLIER_STALLED
	     Multiplier stalled the instruction pipeline.

     DATA_CACHE_STALLED
	     Data cache stalled the instruction pipeline.

     L2_CACHE_REQ
	     L2 cache request, not including cache operations.

     L2_CACHE_MISS
	     L2 cache miss, not including cache operations.

     ADDRESS_BUS_TRANS
	     Address bus transaction.

     SELF_ADDRESS_BUS_TRANS
	     Self initiated address bus transaction.

     DATA_BUS_TRANS
	     Data bus transaction.

   Event Name Aliases
     The following table shows the mapping between the PMC-independent aliases supported by Performance Counters Library (libpmc, -lpmc) and the
     underlying hardware events used.

     Alias		   Event
     branches		   BRANCH_RETIRED
     branch-mispredicts    BRANCH_MISPRED
     dc-misses		   DC_MISS
     ic-misses		   IC_MISS
     instructions	   INSTR_RETIRED

SEE ALSO

     pmc(3), pmc.soft(3), pmc_cpuinfo(3), pmclog(3), hwpmc(4)

HISTORY

     The pmc library first appeared in FreeBSD 6.0.  Intel XScale support first appeared in FreeBSD 9.0.

AUTHORS

     The Performance Counters Library (libpmc, -lpmc) library was written by Joseph Koshy <jkoshy@FreeBSD.org>.

     Intel XScale support was added by Rui Paulo <rpaulo@FreeBSD.org>.

CAVEATS

     The Intel XScale code does not yet support sampling.

BSD
								 December 23, 2009							       BSD