tools/perf/tests/shell/stat+shadow_stat.sh

   1 #!/bin/sh
   2 # perf stat metrics (shadow stat) test
   3 # SPDX-License-Identifier: GPL-2.0
   4
   5 set -e
   6
   7 # skip if system-wide mode is forbidden
   8 perf stat -a true > /dev/null 2>&1 || exit 2
   9
  10 test_global_aggr()
  11 {
  12         local cyc
  13
  14         perf stat -a --no-big-num -e cycles,instructions sleep 1  2>&1 | \
  15         grep -e cycles -e instructions | \
  16         while read num evt hash ipc rest
  17         do
  18                 # skip not counted events
  19                 if [[ $num == "<not" ]]; then
  20                         continue
  21                 fi
  22
  23                 # save cycles count
  24                 if [[ $evt == "cycles" ]]; then
  25                         cyc=$num
  26                         continue
  27                 fi
  28
  29                 # skip if no cycles
  30                 if [[ -z $cyc ]]; then
  31                         continue
  32                 fi
  33
  34                 # use printf for rounding and a leading zero
  35                 local res=`printf "%.2f" $(echo "scale=6; $num / $cyc" | bc -q)`
  36                 if [[ $ipc != $res ]]; then
  37                         echo "IPC is different: $res != $ipc  ($num / $cyc)"
  38                         exit 1
  39                 fi
  40         done
  41 }
  42
  43 test_no_aggr()
  44 {
  45         declare -A results
  46
  47         perf stat -a -A --no-big-num -e cycles,instructions sleep 1  2>&1 | \
  48         grep ^CPU | \
  49         while read cpu num evt hash ipc rest
  50         do
  51                 # skip not counted events
  52                 if [[ $num == "<not" ]]; then
  53                         continue
  54                 fi
  55
  56                 # save cycles count
  57                 if [[ $evt == "cycles" ]]; then
  58                         results[$cpu]=$num
  59                         continue
  60                 fi
  61
  62                 # skip if no cycles
  63                 local cyc=${results[$cpu]}
  64                 if [[ -z $cyc ]]; then
  65                         continue
  66                 fi
  67
  68                 # use printf for rounding and a leading zero
  69                 local res=`printf "%.2f" $(echo "scale=6; $num / $cyc" | bc -q)`
  70                 if [[ $ipc != $res ]]; then
  71                         echo "IPC is different for $cpu: $res != $ipc  ($num / $cyc)"
  72                         exit 1
  73                 fi
  74         done
  75 }
  76
  77 test_global_aggr
  78 test_no_aggr
  79
  80 exit 0