HenningTimm

Memory profiling Rust code with heaptrack in 2019

I recently ran into a classic case of "our code is using way more memory than it should". So I took my first dive into memory profiling Rust code. I read several posts about this, including the following

• KodrAus' gist on profiling rust
• This reddit thread
• Brendan D. Gregg's post about memory flamegraphs
• Bradlee Speice's A Case Study in Heaptrack

siddontang

#!/usr/bin/python

import sys
import re

# perf record -F 99 -p $1 -e "sched:sched_stat_runtime" -a -- sleep 20
# perf script -F comm,pid,tid,cpu,time | python cpu_tenancy.py
# 
# time-monitor-wo 79618/79634 [007] 11994704.695317:
#   grpc-server-1 79618/79954 [006] 11994704.717969:

franciscbalint

#!/bin/bash

# To run this script you need to give execute permission.
# $chmod +x restart_bluetooth.sh;
# If you want only to restart:
# $ ./restart_bluetooth.sh;
# If you want to turn bluetooth on;
# $ ./restart_bluetooth.sh 1;
# If you want to turn bluetooth off;
# $ ./restart_bluetooth.sh 0;

digilist

#!/bin/bash

interface=lo
ip=10.0.0.1
delay=100ms

tc qdisc add dev $interface root handle 1: prio
tc filter add dev $interface parent 1:0 protocol ip prio 1 u32 match ip dst $ip flowid 2:1
tc qdisc add dev $interface parent 1:1 handle 2: netem delay $delay

kwk

.PHONY: using-gcc using-gcc-static using-clang

using-gcc:
	g++-4.8 -o main-gcc -lasan -O -g -fsanitize=address -fno-omit-frame-pointer main.cpp && \
	ASAN_OPTIONS=symbolize=1 ASAN_SYMBOLIZER_PATH=$(shell which llvm-symbolizer) ./main-gcc

using-gcc-static:
	g++-4.8 -o main-gcc-static -static-libstdc++ -static-libasan -O -g -fsanitize=address -fno-omit-frame-pointer main.cpp && \
	ASAN_OPTIONS=symbolize=1 ASAN_SYMBOLIZER_PATH=$(shell which llvm-symbolizer) ./main-gcc-static

azat

#!/usr/bin/env bash

set -x

target=$1

for i in /usr/src/linux/fs/ext4/ext4.ko /usr/src/linux/vmlinux; do
    scp -P2204 root@localhost:$i ./
done

apurvam

/* Instructions on compilation and execution
 * =========================================
 *
 * Compile this program with pthreads:
 *
 *   g++ -Wall -lpthread -o graphdb-simulator graphdb-simulator.cpp
 *
 * Before you run this program, you need to create the following
 * directories:
 *