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Questions tagged [gperftools]

Perftools is a collection of a high-performance multi-threaded malloc() implementation, plus some pretty nifty performance analysis tools.

Perftools is a collection of a high-performance multi-threaded malloc() implementation, plus some pretty nifty performance analysis tools.

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How to use google perf tools

I just started using google performance tools (google-perftools and libgoogle-perftools4 packages in ubuntu), I swear that I'm googling for around a day and I didn't find an answer!! The problem is that I do not get the result for ALL of my…
Mohammad
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How exactly does gperftools CPU profiler start?

gperftools documentation says that libprofiler should be linked into a target program: $ gcc myprogram.c -lprofiler (without changing a code of the program). And then program should be run with a specific environment…
Daniel Vartanov
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Using pprof with gperftools resulting in curl error

So I have been doing the following: $ pprof /bin/ls ls.prof Using local file /bin/ls. Gathering CPU profile from http://ls.prof/pprof/profile?seconds=30 for 30 seconds to /home/user/csteifel/pprof/ls.1414597606.ls.prof Be patient... curl: (7)…
csteifel
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What exactly does C++ profiling (google cpu perf tools) measure?

I trying to get started with Google Perf Tools to profile some CPU intensive applications. It's a statistical calculation that dumps each step to a file using `ofstream'. I'm not a C++ expert so I'm having troubling finding the bottleneck. My first…
Tristan
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How does gperftools work under the hood?

I am looking for a simple explanation of how gperftools works. So far, this is what I have learned: It runs a stop-the-world sampler. In other words, it periodically stops the program being profiled to collect information. Golang's pprof library…
Ben Sandler
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gperftools cpu profiler does not support multi process?

according to the document, http://gperftools.googlecode.com/svn/trunk/doc/cpuprofile.html, the cpu profiles does support multi process and will generate independent output file: If your program forks, the children will also be profiled (since they …
ZRJ
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gperftools - profile file not dumped

I've configured and built gpreftools. however, I can't seem to find the generated profile file of my program to display it. I took the following actions: Adding the -lprofiler linker flag to my .pro, building the program and the flag is added…
Eslam
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How to profile Rcpp code (on linux)

I made an R package with Rcpp where whole simulations are run in c++ and results are analyzed in R. Now I need to profile my functions so I can optimize them, but R profilers can't distinguish what happens inside the C++ functions, and I don't know…
MOzSalles
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What's __nss_passwd_lookup() call that I see in profiler output about?

I'm using gperftools to profile a C++ application, which was compiled using GCC 5.4.0 (with -O3). The code is highly optimized, so I don't see a lot of branches in the output, but there's a branch called __nss_passwd_lookup(), which takes…
Michael Spector
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What does 'f' suffix mean on a C++ library name and how do I load it?

I'm using gperftools v2.3rc and would like to use the improved profiling of threads feature. The release notes state in part: new cpu profiling mode on Linux is now implemented. It sets up separate profiling timers for separate threads. ... [It] is…
WilliamKF
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How to properly handle signals, so that gperftools CPU profiler still works?

I want to profile my daemon program, that pauses the main thread: sigset_t signal_mask; sigemptyset(&signal_mask); sigaddset(&signal_mask, SIGTERM); sigaddset(&signal_mask, SIGINT); int sig; sigwait(&signal_mask, &sig); All other threads simply…
abyss.7
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Interpreting results for gperftools on multi-threaded workloads

I am trying to profile multi-threaded workloads with gperftools but am having difficulty interpreting the output produced. I have written a simple program that launches two threads with identical workloads and profiled with gperftools cpu profiler.…
Niall Murphy
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GPerfTools/pprof: what does a dashed line mean?

When you use the "--gv" option in GPerfTool's pprof command, you get a very pretty graph. Yay. Lines are either thick, thin, dashed or solid. I figure thick/thin is based on the number of sample entries that follow that line. But I have neither…
Mark Gerolimatos
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GPERFTOOLS: CPUPROFILE_FREQUENCY seems to be VERY limited

I have been running a short-running program (about 1/8th of a second user CPU time), and no matter how hard I try, I can never get more than about 90 samples. Frankly, this is not fine-grained enough. This means that no more than about 1K…
Mark Gerolimatos
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How do I specify the host argument to configure scripts in Bazel?

I'm trying to cross-compile envoy (uses Bazel) on lubuntu 16.04 LTS for an aarch64 variant by using the Linaro toolchain at…
user2368778
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