ethercflow

#!/usr/bin/env bash

i=0
while ((i<20)); do
    nohup ./summon-kswapd &
    let ++i
    echo $i
    sleep 1
done

ethercflow

#!/usr/bin/env bash

cat iplist.txt | while read ip
do
    ssh -n -l root $ip umount /tidb
    ssh -n -l root $ip mkdir -p /root/zwb
    scp ./InjuredFS $ip:/root/zwb/
    ssh -n -l root $ip mkdir -p /tidb-original
    ssh -n -l root $ip mount /dev/sdb /tidb-original
    ssh -n -l root $ip cd /root/zwb && nohup ./InjuredFS --original="/tidb-original" --mountpoint="/tidb" &

ethercflow

cat iplist.txt | while read ip
do
    ssh -n -l root $ip pkill InjuredFS
    ssh -n -l root $ip rm /root/zwb/InjuredFS
    ssh -n -l root $ip rm /root/zwb/nohup.out
    scp ./InjuredFS $ip:/root/zwb/
    sleep 120
    ssh -n -l root $ip cd /root/zwb && nohup ./InjuredFS --original="/tidb-original" --mountpoint="/tidb" &
    echo $ip
done

ethercflow

#!/usr/bin/env bash
#
# drsnoop - trace direct reclaim latency.
#           Written using Linux ftrace.
#
# This traces direct reclaim at the vmscan interface, using the vmscan:
# tracepoints. This can help characterize the direct reclaim requested
# and their resulting performance.
#
# USAGE: ./drsnoop [-hst] [-p pid] [-n name] [duration]

ethercflow

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>

pthread_mutex_t lock;
pthread_cond_t cond;
static unsigned counter;

static void dec_counter(void) {

ethercflow

modprobe ifb numifbs=1
ip link set dev ifb0 up

tc qdisc add dev em1 handle ffff: ingress
tc filter add dev em1 parent ffff: protocol ip u32 match u32 0 0 \
    action mirred egress redirect dev ifb0

tc qdisc add dev ifb0 root handle 1: prio
tc filter add dev ifb0 parent 1:0 protocol ip prio 1 u32 match ip src 172.16.21.3 flowid 2:1
tc filter add dev ifb0 parent 1:0 protocol ip prio 1 u32 match ip src 172.16.21.4 flowid 2:1

ethercflow

#define _GNU_SOURCE
#include <stdio.h>
#include <unistd.h>
#include <dlfcn.h>

ssize_t read(int fd, void *buf, size_t count) {
    ssize_t (*origin_read)(int, void*, size_t) = dlsym(RTLD_NEXT, "read");
    sleep(5);
    printf("read sleep 5s\n");
    return origin_read(fd, buf, count);

ethercflow

#!/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:

ethercflow

#!/usr/bin/env bash

source /opt/intel/vtune_amplifier_2018.3.0.558279/amplxe-vars.sh
amplxe-cl -c memory-access -knob analyze-mem-objects=true -knob mem-object-size-min-thres=1024  -run-pass-thru=--no-altstack -target-pid $1

ethercflow

/*
 *  debugfs.h - a tiny little debug file system
 *
 *  Copyright (C) 2004 Greg Kroah-Hartman <[email protected]>
 *  Copyright (C) 2004 IBM Inc.
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License version
 *	2 as published by the Free Software Foundation.
 *