GitHub - yoshinorim/quickstack: A tool to take call stack traces with minimal overheads
quickstack is a tool to take call stack traces with minimal overheads. There are a couple of tools to take stack traces such as gdb, pstack, but these tools have serious overheads. In many cases, target process stops for 0.2-N seconds. So it is dangerous to use such tools in production environment. quickstack makes it possible to take stack traces in less than 1 milliseconds. This is much smaller
Tutorial - Perf Wiki
Introduction Perf is a profiler tool for Linux 2.6+ based systems that abstracts away CPU hardware differences in Linux performance measurements and presents a simple commandline interface. Perf is based on the perf_events interface exported by recent versions of the Linux kernel. This article demonstrates the perf tool through example runs. Output was obtained on a Ubuntu 11.04 system with kernel
vmprof-flamegraph を作りました : DSAS開発者の部屋
vmprof-flamegraph を作ったのでその紹介をしておきます。 まず、サンプルとして Sphinx を使って Python のドキュメントをビルドしたときの vmprof 結果を flamegraph にしてみたので、どんなものかはこちらを見てみてください。 http://dsas.blog.klab.org/img_up/sphinx-prof.svg flamegraph について flamegraph の一般的な紹介については省略して、リンクだけ置いておきます。 公式サイト: http://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html 日本語の紹介記事: http://d.hatena.ne.jp/yohei-a/20150706/1436208007 他にプロファイル結果をビジュアライズするツールとしては cac
Hist Triggers in Linux 4.7
Recent posts: 24 Mar 2024 » Linux Crisis Tools 17 Mar 2024 » The Return of the Frame Pointers 10 Mar 2024 » eBPF Documentary 28 Apr 2023 » eBPF Observability Tools Are Not Security Tools 01 Mar 2023 » USENIX SREcon APAC 2022: Computing Performance: What's on the Horizon 17 Feb 2023 » USENIX SREcon APAC 2023: CFP 02 May 2022 » Brendan@Intel.com 15 Apr 2022 » Netflix End of Series 1 09 Apr 2022 » Te
Peeking into Linux kernel-land using /proc filesystem for quick’n’dirty troubleshooting - Tanel Poder Consulting
Peeking into Linux kernel-land using /proc filesystem for quick’n’dirty troubleshooting This blog entry is about modern Linuxes. In other words RHEL6 equivalents with 2.6.3x kernels and not the ancient RHEL5 with 2.6.18 kernel (wtf?!), which is the most common in enterprises unfortunately. And no, I’m not going to use kernel debuggers or SystemTap scripts here, just plain old “cat /proc/PID/xyz” c
GitHub - RRZE-HPC/likwid: Performance monitoring and benchmarking suite
likwid-topology -------------------------------------------------------------------------------- CPU name: Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz CPU type: Intel Skylake processor CPU stepping: 3 ******************************************************************************** Hardware Thread Topology ******************************************************************************** Sockets: 1 Core
GitHub - gperftools/gperftools: Main gperftools repository
gperftools ---------- (originally Google Performance Tools) The fastest malloc we’ve seen; works particularly well with threads and STL. Also: thread-friendly heap-checker, heap-profiler, and cpu-profiler. OVERVIEW --------- gperftools is a collection of a high-performance multi-threaded malloc() implementation, plus some pretty nifty performance analysis tools. gperftools is distributed under the
Profiling Python in Production - Nylas
We recently reduced CPU usage across our fleet by 80%. One key technique that made this possible was a lightweight profiling strategy that we could run in production. This post is about the ways we approached instrumentation, the tradeoffs involved, and some tools you can use to optimize your own apps (including code!). Background Nylas is a developer platform that provides APIs to integrate with
Adding Processor Trace support to Linux [LWN.net]
Benefits for LWN subscribersThe primary benefit from subscribing to LWN is helping to keep us publishing, but, beyond that, subscribers get immediate access to all site content and access to a number of extra site features. Please sign up today! Tracing is a technique that is used for both performance analysis and debugging. A tracer generates its data into a log; these are tracing events that can
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Linux perf Examples
Recent posts: 22 Jul 2024 » No More Blue Fridays 24 Mar 2024 » Linux Crisis Tools 17 Mar 2024 » The Return of the Frame Pointers 10 Mar 2024 » eBPF Documentary 28 Apr 2023 » eBPF Observability Tools Are Not Security Tools 01 Mar 2023 » USENIX SREcon APAC 2022: Computing Performance: What's on the Horizon 17 Feb 2023 » USENIX SREcon APAC 2023: CFP 02 May 2022 » Brendan@Intel.com 15 Apr 2022 » Netfl
Generate FlameGraph for Python code using plop
README.md Create a FlameGraph to visualize where your code is spending its time. Requires plop and FlameGraph. gistfile1.sh �C�\�U @s�\�U cat profile.out | /path/to/FlameGraph/stackcollapse.pl | /path/to/FlameGraph/flamegraph.pl > profile.big.svg myscript.py �-�\�U @��\�U def print_stacks(stack_counts, outfile): with open(outfile, 'w') as op: for (stack, count) in stack_counts.iteritems(): for fra
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Dr. Memory is a memory monitoring tool capable of identifying memory-related programming errors such as accesses of uninitialized memory, accesses to unaddressable memory (including outside of allocated heap units and heap underflow and overflow), accesses to freed memory, double frees, memory leaks, and (on Windows) handle leaks, GDI API usage errors, and accesses to un-reserved thread local stor
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GitHub - openresty/openresty-systemtap-toolkit: Real-time analysis and diagnostics tools for OpenResty (including NGINX, LuaJIT, ngx_lua, and more) based on SystemTap
GitHub - brendangregg/FlameGraph: Stack trace visualizer
bcc: Taming Linux 4.3+ Tracing Superpowers
iovisor/bcc: BCC - Tools for BPF-based Linux IO analysis, networking, monitoring, and more
GitHub - vmprof/vmprof-python: vmprof - a statistical program profiler
GitHub - what-studio/profiling: Was an interactive continuous Python profiler.
bdarnell/plop: Python Low-Overhead Profiler
Security Tools for Containers, Kubernetes, and Cloud (FrostSullivan)
