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