limper dec20

[root@perf ~]# history
    1  top
    2  dd if=/dev/zero of=/dev/null &
    3  top
    4  firefox &
    5  ps aux | grep defunc
    6  killall dd
    7  top
    8  cd /sys
    9  ls
   10  cd bus/
   11  ls
   12  cd cpu/
   13  ls
   14  cd devices/
   15  pwd
   16  ls
   17  cat cpu1/online
   18  echo 0> cpu1/online
   19  echo 0> cpu2/online
   20  top
   21  lscpu
   22  echo 0 > cpu2/online
   23  cat cpu2/online
   24  lscpu
   25  echo 0 > cpu1/online
   26  lscpu
   27  top
   28  history
   29  owd
   30  pwd
   31  dd if=/dev/zero of=/dev/null &
   32  top
   33  killall dd
   34  cd
   35  top
   36  dnf install -y git
   37  ip a
   38  nmtui
   39  dnf install -y git
   40  git clone https://github.com/sandervanvugt/performance
   41  git clone https://github.com/sandervanvugt/luth
   42  luth/countdown 12
   43  top
   44  cd /proc/
   45  ls
   46  less meminfo
   47  vmstat 2 10
   48  vmstat 2 100
   49  top
   50  iotop
   51  cd
   52  iostat -mx 1
   53  iostat 2 100
   54  iotop
   55  cd /proc
   56  cd sys
   57  ls
   58  cd vm
   59  ls
   60  pwd
   61  cat swappiness
   62  echo 80 > swappiness
   63  cat swappiness
   64  echo 10 > swappiness
   65  cd
   66  top
   67  swapon -s
   68  iotop
   69  cd /proc/sys/vm
   70  cat swappiness
   71  vim /etc/sysctl.conf
   72  cd /etc/sysctl.d/
   73  ls
   74  \ls -l
   75  vim 50-sander.conf
   76  cd /usr/lib/sysctl.d/
   77  ls
   78  vim 60-libvirtd.conf
   79  cd
   80  man proc
   81  dnf search kernel | grep -i doc
   82  dnf install -y kernel-doc
   83  cd /usr/share/doc/kernel-doc-4.18.0/
   84  ls
   85  cd Documentation/
   86  ls
   87  cd sysctl/
   88  ls
   89  ls -l
   90  less vm.txt
   91  cd /proc
   92  ls
   93  echo h > sysrq-trigger
   94  dmesg
   95  history --help
   96  history -w
   97  man ionice
   98  systemctl status sshd
   99  systemctl stop sshd.service
  100  rm -rf /etc/systemd/system.control/sshd.service.d/
  101  systemctl start sshd.service
  102  systemctl daemon-reload
  103  cat /proc/sys/vm/swappiness
  104  cat /etc/sysctl.d/50-sander.conf
  105  tuned-amd list
  106  tuned-adm list
  107  mkdir /etc/tuned/sander
  108  cp /usr/lib/tuned/latency-performance/tuned.conf /etc/tuned/sander
  109  vim /etc/tuned/sander
  110  tuned-adm list
  111  tuned-adm profile sander
  112  cat /proc/sys/vm/swappiness
  113  cd performance/
  114  ls
  115  vim stress1.service
  116  vim stress2.service
  117  cp stress* /etc/systemd/system/
  118  systemctl daemon-reload
  119  systemctl start stress1.service
  120  bg
  121  systemctl start stress2.service
  122  bg
  123  top
  124  cd /sys
  125  ls
  126  cd class
  127  ls
  128  history | less
  129  cd /sys/bus/cpu/devices/
  130  echo 0 > cpu1/online
  131  echo 0 > cpu2/online
  132  top
  133  cd
  134  man 5 systemd.resource-control
  135  systemd-cgtop
  136  systemd-cgls
  137  systemctl set-property sshd.service MemoryAccount=yes
  138  systemctl set-property sshd.service MemoryAccounting=yes
  139  systemctl set-property sshd.service MemoryLimit=1M
  140  systemctl status sshd.service
  141  systemctl set-property sshd.service MemoryLimit=128K
  142  systemctl status sshd.service
  143  systemctl restart sshd
  144  systemctl status sshd.service
  145  journalctl -u sshd
  146  less /var/log/messages
  147  top
  148  systemctl set-property system.slice CPUShares=8192
  149  systemctl status system.slice
  150  top
  151  history
  152  cd /sys/fs/cgroup/memory/system.slice/stress1.service/
  153  ls
  154  history
  155  systemctl set-property sshd.service MemoryLimit=1M
  156  systemctl restart sshd
  157  systemctl status sshd.service
  158  systemctl show system.slice
  159  cd
  160  cd /etc
  161  find . -name limits.conf
  162  cd security/
  163  vim limits.
  164  vim limits.conf
  165  systemctl show sshd.service
  166  history | grep man
  167  cd
  168  luth/countdown 12
  169  top
  170  systemctl show sshd.service
  171  man -k systemd | wc
  172  less /proc/meminfo
  173  top
  174  echo h > /proc/sysrq-trigger
  175  dmesg
  176  echo f > /proc/sysrq-trigger
  177  systemctl show sshd.service
  178  slabtop
  179  free -m
  180  echo 500 > /proc/sys/vm/nr_hugepages
  181  free -m
  182  cat /proc/meminfo
  183  q
  184  cd /sys/block/sda/queue/iosched/
  185  ls
  186  cd ..
  187  ls
  188  cat scheduler
  189  cd
  190  time dd if=/dev/zero of=/bigfile bs=1M count=1024
  191  echo none > /sys/block/sda/queue/scheduler
  192  time dd if=/dev/zero of=/bigfile bs=1M count=1024
  193  history