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Zheyuan Li
Zheyuan Li
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update

I installed the papi-tools library, and papi_native_avail gives me

Available native events and hardware information.

PAPI Version             : 5.3.0.0
Vendor string and code   : GenuineIntel (1)
Model string and code    : Intel(R) Core(TM) M-5Y71 CPU @ 1.20GHz (61)
CPU Revision             : 4.000000
CPUID Info               : Family: 6  Model: 61  Stepping: 4
CPU Max Megahertz        : 2900
CPU Min Megahertz        : 500
Hdw Threads per core     : 1
Cores per Socket         : 2
Sockets                  : 2
NUMA Nodes               : 1
CPUs per Node            : 4
Total CPUs               : 4
Running in a VM          : no
Number Hardware Counters : 0
Max Multiplex Counters   : 64

update

I installed the papi-tools library, and papi_native_avail gives me

Available native events and hardware information.

PAPI Version             : 5.3.0.0
Vendor string and code   : GenuineIntel (1)
Model string and code    : Intel(R) Core(TM) M-5Y71 CPU @ 1.20GHz (61)
CPU Revision             : 4.000000
CPUID Info               : Family: 6  Model: 61  Stepping: 4
CPU Max Megahertz        : 2900
CPU Min Megahertz        : 500
Hdw Threads per core     : 1
Cores per Socket         : 2
Sockets                  : 2
NUMA Nodes               : 1
CPUs per Node            : 4
Total CPUs               : 4
Running in a VM          : no
Number Hardware Counters : 0
Max Multiplex Counters   : 64
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Zheyuan Li
Zheyuan Li
  • 123
  • 1
  • 5

Why can't I find hardware cache event in my perf list?

I have a problem in using linux perf on a newly bought laptop: there is no available hardware cache effect in my perf list!!! Well, this is really all important information that I wish to sample!! Here is my perf list:

List of pre-defined events (to be used in -e):
cpu-cycles OR cycles                               [Hardware event]
instructions                                       [Hardware event]
cache-references                                   [Hardware event]
cache-misses                                       [Hardware event]
branch-instructions OR branches                    [Hardware event]
branch-misses                                      [Hardware event]
bus-cycles                                         [Hardware event]
ref-cycles                                         [Hardware event]

cpu-clock                                          [Software event]
task-clock                                         [Software event]
page-faults OR faults                              [Software event]
context-switches OR cs                             [Software event]
cpu-migrations OR migrations                       [Software event]
minor-faults                                       [Software event]
major-faults                                       [Software event]
alignment-faults                                   [Software event]
emulation-faults                                   [Software event]
dummy                                              [Software event]

branch-instructions OR cpu/branch-instructions/    [Kernel PMU event]
branch-misses OR cpu/branch-misses/                [Kernel PMU event]
bus-cycles OR cpu/bus-cycles/                      [Kernel PMU event]
cache-misses OR cpu/cache-misses/                  [Kernel PMU event]
cache-references OR cpu/cache-references/          [Kernel PMU event]
cpu-cycles OR cpu/cpu-cycles/                      [Kernel PMU event]
instructions OR cpu/instructions/                  [Kernel PMU event]
power/energy-cores/                                [Kernel PMU event]
power/energy-gpu/                                  [Kernel PMU event]
power/energy-pkg/                                  [Kernel PMU event]
power/energy-ram/                                  [Kernel PMU event]
ref-cycles OR cpu/ref-cycles/                      [Kernel PMU event]

rNNN                                               [Raw hardware event descriptor]
cpu/t1=v1[,t2=v2,t3 ...]/modifier                  [Raw hardware event descriptor]
(see 'man perf-list' on how to encode it)

mem:<addr>[:access]                                [Hardware breakpoint]

[ Tracepoints not available: Permission denied ]

while this is the perf list I used to see: https://perf.wiki.kernel.org/index.php/Tutorial#Events.

What I used to do is:

sudo perf stat -e L1-dcache-loads,L1-dcache-load-misses,LLC-loads,LLC-load-misses -a --append -o perf.txt [some command to run a file]

but this does not work on my new machine. How can I collect data I want in this case?

I am using Ubuntu 14.04, with kernel <3.19.0-56>. Perf version <3.19.8-ckt15>.