Generate image plots of processes' memory usage very quickly, within a single binary.

Last update: Apr 17, 2021

Comments: 2

memplot

A small utility written in golang to quickly plot memory usage of processes. memplot constantly samples memory usage of a process, for a given amount of time and then outputs an image file. Painless and straightforward. Supported image extensions are: .eps, .jpg, .jpeg, .pdf, .png, .svg, .tex, .tif and .tiff

Installation

Binaries for Linux and MacOS are available in the releases page

go get -u -v github.com/0x0f0f0f/memplot/cmd/memplot

Usage

Usage of memplot:
Arguments following options will be interpreted as the command to spawn and sample
  -dur duration
    	total profiling time. a value of 0 means that the program
    	will be sampled until it is no longer running
  -height string
    	plot image height (can be cm or in) (default "12cm")
  -o string
    	output image file name. supported extensions are:
    	.eps, .jpg, .jpeg, .pdf, .png, .svg, .tex, .tif and .tiff
    	(default "output-plot.png")
  -pid int
    	pid of the process to analyze (default -1)
  -sd duration
    	sample size in time (default 5ms)
  -vsz
    	plot virtual size
  -width string
    	plot image width (can be cm or in) (default "16cm")

Example Plot

memplot -pid 25273 -width 8in -height 8in -dur 60s -sd 50ms -o plot.png

memplot -width 8in -height 8in -dur 60s -sd 50ms -o plot.png firefox

Roadmap

Owner

Alessandro

CS Student, PLer

https://github.com/0x0f0f0f/memplot

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Comments

panic if the spawned command exits with a non-zero exit code

Hey, loving the improvements! The auto-spawning a command makes it much easier to use, and the SVG output option lets you zoom in a let a closer look.

I found a panic though. If the spawned command exits with a non-zero exit code, memplot panics:

panic: exit status 64

goroutine 18 [running]:
main.check(...)
	/home/runner/work/memplot/memplot/cmd/memplot.go:16
main.main.func2(0xc000012090, 0x3, 0x3, 0xc00018e000)
	/home/runner/work/memplot/memplot/cmd/memplot.go:86 +0xfe
created by main.main
	/home/runner/work/memplot/memplot/cmd/memplot.go:80 +0x4e8

Installation installs memplot as "cmd"
Installation instructions are:

go get -u -v github.com/0x0f0f0f/memplot/cmd

...this installs a binary called "cmd", much like if you cd to that dir. and "go build". Usual layout I use is:

github.com/<user>/<repo>/cmd/memplot/memplot.go

...then:

go get -u -v github.com/0x0f0f0f/memplot/cmd/memplot

..will give you a memplot binary. There might be a more efficient way to do this but, I keep using the same thing because it works :).

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