FlameGraph

FlameGraph copied to clipboard

.. and apparently reduce memory usage.

mjguzik

Hello @brendangregg , I’m really appreciated with your work. I work under system performance validation. That’s an old and complicated system with a lot of configurable options. That make possible...

ifdru74

Stackcollapse perf streaming

3

This may be used to sample from a larger set of data: ~~~ perf script | ./stackcollapse-perf.pl --stream | shuf -n 50000 | # Take 50000 random lines/samples ./stackcollapse-sum.pl |...

randomstuff

stackcollapse-perf.pl should be more memory-efficient

3

I'm concerned stackcollapse-perf.pl is going to blow through my available RAM; is there any way for it to be more streaming?  My perf.data file is almost 9GB, the output...

JasonGross

Xcode Instruments removed the export option a few years ago (I'm unsure when, but it is definitely not available in Instruments 13.0 onwards). However, you can still access the data...

jayrhynas

Flamegraph error when passing it what seems like a valid folded file

16

I seem to have a valid out-perf.folded file but the flamegraph.pl program complains when run on this file: Ignored 25155 lines with invalid format ERROR: No stack counts found The...

RajivKurian

Add padding to make sure subtitle can be seen in an icicle graph

amorimur

stackcollapse-perf: fix flag in example

2

Looks like the intent was to pass --fields, not --force. I was already confused when I started reading the docs for this script, using the wrong option didn't help matters...

wolfgang42

This came up downstream in Wikimedia's PHP profiling stack (, ) where some of the collected samples were formatted using a null byte. This is how PHP 7.2 represents an...

Krinkle

stackcollapse-perf.pl ignores period of samples

16

It seems like `stackcollapse-perf.pl` ignores the period associated with each sample record so all recorded samples are given the same weight. This ends up in the generated flamegraph not being...

hardc0der