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 THRESHOLD=0.015
   8
   9 # skip if system-wide mode is forbidden
  10 perf stat -a true > /dev/null 2>&1 || exit 2
  11
  12 # skip if on hybrid platform
  13 perf stat -a -e cycles sleep 1 2>&1 | grep -e cpu_core && exit 2
  14
  15 test_global_aggr()
  16 {
  17         perf stat -a --no-big-num -e cycles,instructions sleep 1  2>&1 | \
  18         grep -e cycles -e instructions | \
  19         while read num evt _ ipc rest
  20         do
  21                 # skip not counted events
  22                 if [ "$num" = "<not" ]; then
  23                         continue
  24                 fi
  25
  26                 # save cycles count
  27                 if [ "$evt" = "cycles" ]; then
  28                         cyc=$num
  29                         continue
  30                 fi
  31
  32                 # skip if no cycles
  33                 if [ -z "$cyc" ]; then
  34                         continue
  35                 fi
  36
  37                 # use printf for rounding and a leading zero
  38                 res=`echo $num $cyc | awk '{printf "%.2f", $1 / $2}'`
  39                 if [ "$ipc" != "$res" ]; then
  40                         # check the difference from the real result for FP imperfections
  41                         diff=`echo $ipc $res $THRESHOLD | \
  42                         awk '{x = ($1 - $2) < 0 ? ($2 - $1) : ($1 - $2); print (x > $3)}'`
  43
  44                         if [ $diff -eq 1 ]; then
  45                                 echo "IPC is different: $res != $ipc  ($num / $cyc)"
  46                                 exit 1
  47                         fi
  48
  49                         echo "Warning: Difference of IPC is under the threshold"
  50                 fi
  51         done
  52 }
  53
  54 test_no_aggr()
  55 {
  56         perf stat -a -A --no-big-num -e cycles,instructions sleep 1  2>&1 | \
  57         grep ^CPU | \
  58         while read cpu num evt _ ipc rest
  59         do
  60                 # skip not counted events
  61                 if [ "$num" = "<not" ]; then
  62                         continue
  63                 fi
  64
  65                 # save cycles count
  66                 if [ "$evt" = "cycles" ]; then
  67                         results="$results $cpu:$num"
  68                         continue
  69                 fi
  70
  71                 cyc=${results##* $cpu:}
  72                 cyc=${cyc%% *}
  73
  74                 # skip if no cycles
  75                 if [ -z "$cyc" ]; then
  76                         continue
  77                 fi
  78
  79                 # use printf for rounding and a leading zero
  80                 res=`echo $num $cyc | awk '{printf "%.2f", $1 / $2}'`
  81                 if [ "$ipc" != "$res" ]; then
  82                         # check difference from the real result for FP imperfections
  83                         diff=`echo $ipc $res $THRESHOLD | \
  84                         awk '{x = ($1 - $2) < 0 ? ($2 - $1) : ($1 - $2); print (x > $3)}'`
  85
  86                         if [ $diff -eq 1 ]; then
  87                                 echo "IPC is different: $res != $ipc  ($num / $cyc)"
  88                                 exit 1
  89                         fi
  90
  91                         echo "Warning: Difference of IPC is under the threshold"
  92                 fi
  93         done
  94 }
  95
  96 test_global_aggr
  97 test_no_aggr
  98
  99 exit 0