ceph/src/spdk/scripts/prep_benchmarks.sh

   1 #!/usr/bin/env bash
   2
   3 function configure_performance() {
   4         echo -n "Placing all CPUs in performance mode..."
   5         for governor in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do
   6                 echo -n performance > $governor
   7         done
   8         echo "Done"
   9
  10         if [ -f "/sys/devices/system/cpu/intel_pstate/no_turbo" ]; then
  11                 echo -n "Disabling Turbo Boost..."
  12                 echo -n 1 > /sys/devices/system/cpu/intel_pstate/no_turbo
  13                 echo "Done"
  14         fi
  15
  16         echo -n "Disabling irqbalance service..."
  17         service irqbalance stop 2> /dev/null
  18         echo "Done"
  19
  20         echo -n "Moving all interrupts off of core 0..."
  21         count=$(($(nproc) / 4))
  22         cpumask="e"
  23         for ((i = 1; i < count; i++)); do
  24                 if [ $((i % 8)) -eq 0 ]; then
  25                         cpumask=",$cpumask"
  26                 fi
  27                 cpumask="f$cpumask"
  28         done
  29         for file in /proc/irq/*/smp_affinity; do
  30                 echo "$cpumask" > $file 2> /dev/null
  31         done
  32         echo "Done"
  33
  34         echo -n "Configuring kernel blk-mq for NVMe SSDs..."
  35         for queue in /sys/block/nvme*n*/queue; do
  36                 if [ -f "$queue/nomerges" ]; then
  37                         echo "1" > $queue/nomerges
  38                 fi
  39
  40                 if [ -f "$queue/io_poll" ]; then
  41                         echo "1" > $queue/io_poll
  42                 fi
  43
  44                 if [ -f "$queue/io_poll_delay" ]; then
  45                         echo "-1" > $queue/io_poll_delay
  46                 fi
  47         done
  48         echo "Done"
  49 }
  50
  51 function reset_performance() {
  52         echo -n "Placing all CPUs in powersave mode..."
  53         for governor in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do
  54                 echo -n powersave > $governor
  55         done
  56         echo "Done"
  57
  58         if [ -f "/sys/devices/system/cpu/intel_pstate/no_turbo" ]; then
  59                 echo -n "Enabling Turbo Boost..."
  60                 echo -n 0 > /sys/devices/system/cpu/intel_pstate/no_turbo
  61                 echo "Done"
  62         fi
  63
  64         echo -n "Enabling irqbalance service..."
  65         service irqbalance start 2> /dev/null
  66         echo "Done"
  67 }
  68
  69 if [ "$1" = "reset" ]; then
  70         reset_performance
  71 else
  72         configure_performance
  73 fi