linux performance jan23

    1  top
    2  ps aux | grep zombie
    3  ps aux | grep defunc
    4  kill 8204
    5  ps aux | grep defunc
    6  kill -SIGCHLD 8203
    7  ps aux | grep defunc
    8  kill 8203
    9  ps aux | grep defunc
   10  ps fax | less
   11  top -u student
   12  history
   13  history -w
   14  free -m
   15  cat /proc/meminfo
   16  cat /proc/meminfo  | less
   17  dd if=/dev/zero of=/swapfile bs=1M count=1024
   18  free -m
   19  mkswap /swapfile
   20  chmod 0600 /swapfile
   21  vim /etc/fstab
   22  mount -a
   23  free -m
   24  swapon -a
   25  free -m
   26  vmstat 2 50
   27  top
   28  vmstat 2 50
   29  history -w
   30  free -m
   31  cat /proc/meminfo
   32  cat /proc/meminfo  | less
   33  dd if=/dev/zero of=/swapfile bs=1M count=1024
   34  free -m
   35  mkswap /swapfile
   36  chmod 0600 /swapfile
   37  vim /etc/fstab
   38  mount -a
   39  free -m
   40  swapon -a
   41  free -m
   42  vmstat 2 50
   43  top
   44  vmstat 2 50
   45  history -w
   46  reboot
   47  df -h
   48  free -m
   49  history
   50  top
   51  less /proc/meminfo
   52  cd performance/
   53  ./countdown 12
   54  top
   55  mount | grep proc
   56  cd /proc
   57  ls
   58  cd 5360
   59  ls
   60  cat stat
   61  cat status | less
   62  pwd
   63  cd ..
   64  ls
   65  less interrupts
   66  less uptime
   67  uptime
   68  less cpuinfo
   69  lscpu
   70  lscpu | less
   71  ls
   72  echo h > sysrq-trigger
   73  dmesg
   74  echo m > sysrq-trigger
   75  dmesg
   76  cd sys
   77  ls
   78  cd vm
   79  ls
   80  cat swappiness
   81  echo 50 > swappiness
   82  free -m
   83  echo 2 > drop_caches
   84  free -m
   85  cat dirty_writeback_centisecs
   86  cat dirty_expire_centisecs
   87  cat nr_hugepages
   88  free -m
   89  echo 1000 > nr_hugepages
   90  free -m
   91  cd ..
   92  cd kernel/
   93  ls
   94  cat pid_max
   95  echo $(( 256 * 256 ))
   96  cd /etc/
   97  ls sysctl*
   98  vim sysctl.d/90-sander.conf
   99  cd /usr/lib/sysctl.d/
  100  ls
  101  man proc
  102  uname -r
  103  history | grep sysrq
  104  sysctl -a
  105  sysctl -a | wc
  106  cd
  107  systemctl status tuned
  108  systemctl list-unit-files tuned*
  109  systemctl start tuned.service
  110  systemctl status tuned
  111  tuned-adm list
  112  tuned-adm profile accelerator-performance
  113  cd /usr/lib/tuned/
  114  ls
  115  ls accelerator-performance/
  116  cat accelerator-performance/tuned.conf
  117  tuned-adm list
  118  reboot
  119  top
  120  cd /proc/sys/vm/
  121  ls
  122  cat oom_kill_allocating_task
  123  top
  124  history -w
  125  echo h > /proc/sysrq-trigger
  126  dmesg
  127  #echo f > /proc/sysrq-trigger
  128  history -w
  129  history
  130  top
  131  systemctl cat sshd.service
  132  cd performance/
  133  ./countdown 12
  134  pwd
  135  ls
  136  cat stress1.service
  137  cat stress2.service
  138  cp stress* /etc/systemd/system
  139  systemctl start stress1
  140  systemctl start stress2
  141  top
  142  lscpu
  143  cd /sys/bus/cpu/devices/
  144  cd
  145  cd /sys/bus/cpu/devices/cpu0/cd
  146  ls /sys/bus/cpu/devices/cpu0/
  147  cat /sys/bus/cpu/devices/cpu0/online
  148  echo 0> /sys/bus/cpu/devices/cpu1/online
  149  top
  150  echo 0 > /sys/bus/cpu/devices/cpu1/online
  151  lscpu | less
  152  top
  153  systemctl set-property system.slice CPUShare=8192
  154  systemctl set-property system.slice CPUShares=8192
  155  top
  156  echo 1 > /sys/bus/cpu/devices/cpu1/online
  157  man systemd.resource-control
  158  systemd-cgtop
  159  systemd-cgls
  160  systemd-run sleep 3600
  161  systemctl cat run-r8a195ee2df1e4380be6e69ce4e2f8870.service
  162  history
  163  systemctl set-property run-r8a195ee2df1e4380be6e69ce4e2f8870.service CPUQuota=20%
  164  systemctl cat run-r8a195ee2df1e4380be6e69ce4e2f8870.service
  165  systemctl set-property httpd.service MemoryLimit=2M
  166  systemctl status http
  167  systemctl status httpd
  168  systemctl cat httpd
  169  systemctl start httpd.service
  170  systemctl stop httpd.service
  171  cd /sys/block/
  172  ls
  173  cd sda
  174  ls
  175  cd queue
  176  ls
  177  cat /sys/block/sda/queue/scheduler
  178  echo none > /sys/block/sda/queue/scheduler
  179  time dd if=/dev/zero of=/bigfile bs=1M count=1024
  180  echo bfs > /sys/block/sda/queue/scheduler
  181  echo bfq > /sys/block/sda/queue/scheduler
  182  time dd if=/dev/zero of=/bigfile bs=1M count=1024
  183  cd
  184  history