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Questions tagged [oprofile]

OProfile is a profiling system for systems running Linux 2.2, 2.4, and 2.6. Profiling runs transparently in the background and profile data can be collected at any time. OProfile makes use of the hardware performance counters provided on Intel, AMD, and other processors, and uses a timer-interrupt based mechanism on CPUs without counters. OProfile can profile the whole system in high detail.

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OProfile failed to generate callgraph

I'm trying to generate a callgraph using oprofile and for some reason it fails. I'm using the below command to config it: opcontrol --shutdown opcontrol --reset opcontrol --no-vmlinux opcontrol --separate=library opcontrol --event=default opcontrol…
Roi
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oprofile unable to produce callgraph on ARM

This is actually an exact duplicate of this SO question which unfortunately does not have any answer. Is it possible to get a proper callgraph on ARM? I'm using oprofile 0.9.6 on an ARM926 which does not have performance counters so oprofile…
celavek
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oprofile - using ocount / operf - LLC miss issue 100%

Host: ubuntu 15.04 oprofile version: 1.1.0 CPU: Intel XEON D-1520 1. ./ocount --events=INST_RETIRED,LLC_MISSES,LLC_REFS ./test The result is: Event Count % time counted INST_RETIRED 1,847,242,162 …
Sam
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Oprofile - using operf to show INST_RETIRED and l1d_replacement events in opreport

Host: Ubuntu 14.04 Opef version: 0.9.9 I would like to have two events shown in opreport so that I enter the following command to run operf: operf ./l1thrash -e l1d_replacement:10000 -e INST_RETIRED:10000 --separate=cpu After some seconds, the…
Sam
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What type of POWER8 PMU events should be maximized?

I perform a performance analysis of an application running on IBM POWER8 server following the CPI breakdown model for POWER8. I understand that I need to reduce the percentage of stalls caused, for example, by cache misses…
Alexander Pozdneev
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oprofile unable to produce call graph

I am trying to use oprofile to generate call graph. Compiler is g++, platform is linux x86-64, linker is gfortran C++ code is compiled with -fno- omit-frame-pointer. oprofile is started with --callgraph=25. report I run with --callgraph. the call…
Anycorn
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Visualize OProfile output with gprof2dot (incomplete output)

So I'm not sure what I'm doing wrong. I have a profile generated by oprofile. I converted this oprofile using the command below to a text file (looooots of lines in that txt file): opreport -c --session-dir=dirNAME/oprofile_data/ >…
Mewa
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Oprofile error on android devices. oprofiled: too many events passed

I use oprofile on my MDP. Android 4.3 userdebug version. #opcontrol --setup #oprofiled --vmlinux=/data/vmlinux --kernel-range=c00080ernel-range=c00080 --event=CPU_CYCLES oprofiled: too many events passed. # opcontrol --status Driver directory:…
Jansen
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Cycles consumed in each function through Oprofile

Oprofile works on Sampling Based theory. Opreport -l option provides us the profiling report in the following way: samples % image name symbol name 78149 15.0776 cvqa comp_corr.clone.2 With this…
Manish Kumar
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Profiling output of JIT on Linux with perf_events/oprofile?

I want to profile code, generated by JIT on Linux, with using hardware performace counters. As I know, most common profilers are oprofile and perf. How can I integrate JIT and oprofile/perf? My JIT is not JAVA which is already supported in oprofile.…
osgx
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difference between ftrace function statistics and oprofile

May anyone please compare ftrace statistics and oprofile? We observed the following phenomenons: with oprofile enabled during the network performance test, we see little impact to the performance test (compare to the case where oprofile is not…
Dien Nguyen
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Ubuntu 2.6.35 vmlinux image for kernel profiling using oprofile

HI i want to run profiling on Kernel using Oprofile but it requires uncompressed vmlinux image and ubuntu 10.10 provides vmlinuz which is stripped and compressed. Pls help
user1173298
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Tools to help profile cache misses

What tools does the community use to help identify if cache misses are even a problem, and if they are a problem where they are occuring in the code? The first question is: How do I identify how much time is being spent waiting for data from main…
joe2748
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Using O-Profile with Linux RedHat OS => conflict with NMI watchdog

I was trying to run o-profile (a profiling program for linux) and kept getting an error while starting saying something like counter 0 was being use by 'NMI watchdog'. Is NMI part of the OS or is it a separate package that was downloaded? How would…
user972276
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oprofile on a stripped binary

I am trying to find ways to use oprofile on a stripped binary yet still get detailed information when symbol tables are available later, but so far I haven't find any solution. Here is my situation: Our software is shipped to our customer stripped,…
Junping
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