[PerfSuite-users] Floating Point Instructions

[Abel L. <abe...@gm...>]

What's the difference between a floating point instruction and a  
floating point operation? I have papi installed with perfsuite on top  
of it. When I run a program I get a large number for floating point  
operations but zero for floating point instructions. First if all I  
don't know the difference and second of all why am getting zero for  
floating point instructions? Here is the output to psrun.

<hwpcevent type="preset" name="PAPI_BR_INS" derived="no">996217933</ 
hwpcevent>
                 <hwpcevent type="preset" name="PAPI_BR_MSP"  
derived="no">2639</hwpcevent>
                 <hwpcevent type="preset" name="PAPI_BR_TKN"  
derived="no">995330538</hwpcevent>
                 <hwpcevent type="preset" name="PAPI_FP_INS"  
derived="yes">0</hwpcevent>
                 <hwpcevent type="preset" name="PAPI_FP_OPS"  
derived="yes">2983143200</hwpcevent>
                 <hwpcevent type="preset" name="PAPI_L1_ICA"  
derived="no">26839719801</hwpcevent>
                 <hwpcevent type="preset" name="PAPI_L1_ICM"  
derived="no">35060</hwpcevent>
                 <hwpcevent type="preset" name="PAPI_L2_TCH"  
derived="no">249722</hwpcevent>
                 <hwpcevent type="preset" name="PAPI_L2_TCM"  
derived="no">59</hwpcevent>
                 <hwpcevent type="preset" name="PAPI_RES_STL"  
derived="no">0</hwpcevent>
                 <hwpcevent type="preset" name="PAPI_TLB_DM"  
derived="no">21720</hwpcevent>
                 <hwpcevent type="preset" name="PAPI_TLB_IM"  
derived="no">7835</hwpcevent>
                 <hwpcevent type="preset" name="PAPI_TLB_TL"  
derived="no">30942</hwpcevent>
                 <hwpcevent type="preset" name="PAPI_TOT_CYC"  
derived="no">82809635010</hwpcevent>
                 <hwpcevent type="preset" name="PAPI_TOT_INS"  
derived="no">12960989996</hwpcevent>
                 <hwpcevent type="preset" name="PAPI_VEC_INS"  
derived="yes">4982674130</hwpcevent>


Here is  psinv -p
System Information -
Node Name:              bhutan
OS Name:                Linux
OS Release:             2.6.13-perfctr-15.18-default
OS Build/Version:       #1 Wed Feb 6 22:58:43 EST 2008
OS Machine:             x86_64
Processors:             1
Total Memory (MB):      1000.40
System Page Size (KB):  4.00

Processor Information -
Vendor:                 Intel
Processor family:       Pentium 4
Brand:                  Intel(R) Pentium(R) 4 CPU 3.00GHz
Model (Type):           (unknown)
Revision:               3
Clock Speed:            2992.61 MHz

Cache and TLB Information -
Cache levels:           2
Caches/TLBs:            5

Cache Details -
Level 1:
         Type:           Data
         Size:           16 KB
         Line size:      64 bytes
         Associativity:  8-way set associative

         Type:           Instruction Trace
         Size:           12K uOps
         Associativity:  8-way set associative

Level 2:
         Type:           Unified
         Size:           2.00 MB
         Line size:      64 bytes
         Associativity:  8-way set associative

TLB Details -
Level 1:
         Type:           Instruction
         Entries:        64
         Pagesize (KB):  4 2048 4096
         Associativity:  Fully associative

         Type:           Data
         Entries:        64
         Pagesize (KB):  4 4096
         Associativity:  Fully associative

PAPI Version Information -
Major version:          3
Minor version:          5
Revision:               0

PAPI Standard Event Information -
Standard events:        23
Non-derived events:     17
Derived events:         6

PAPI Standard Event Details -
Non-derived:
         PAPI_BR_INS:    Branch instructions
         PAPI_BR_MSP:    Conditional branch instructions mispredicted
         PAPI_BR_NTK:    Conditional branch instructions not taken
         PAPI_BR_PRC:    Conditional branch instructions correctly  
predicted
         PAPI_BR_TKN:    Conditional branch instructions taken
         PAPI_L1_ICA:    Level 1 instruction cache accesses
         PAPI_L1_ICM:    Level 1 instruction cache misses
         PAPI_L2_TCA:    Level 2 total cache accesses
         PAPI_L2_TCH:    Level 2 total cache hits
         PAPI_L2_TCM:    Level 2 cache misses
         PAPI_RES_STL:   Cycles stalled on any resource
         PAPI_TLB_DM:    Data translation lookaside buffer misses
         PAPI_TLB_IM:    Instruction translation lookaside buffer misses
         PAPI_TLB_TL:    Total translation lookaside buffer misses
         PAPI_TOT_CYC:   Total cycles
         PAPI_TOT_IIS:   Instructions issued
         PAPI_TOT_INS:   Instructions completed
Derived:
         PAPI_FP_INS:    Floating point instructions
         PAPI_FP_OPS:    Floating point operations
         PAPI_LD_INS:    Load instructions
         PAPI_LST_INS:   Load/store instructions completed
         PAPI_SR_INS:    Store instructions
         PAPI_VEC_INS:   Vector/SIMD instructions

Abel


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