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d13841e789
Running shellcheck on stat+shadow_stat.sh generates below warning:
In tests/shell/stat+shadow_stat.sh line 48:
while read cpu num evt hash ipc rest
^--^ SC2034 (warning): hash appears unused. Verify use (or export if used externally).
This variable is intentionally unused since it is needed to parse
through the output. Use "_" as a prefix for this throw away variable.
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Disha Goel <disgoel@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: linuxppc-dev@lists.ozlabs.org
Link: https://lore.kernel.org/r/20230709182800.53002-11-atrajeev@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
81 lines
1.6 KiB
Bash
Executable file
81 lines
1.6 KiB
Bash
Executable file
#!/bin/sh
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# perf stat metrics (shadow stat) test
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# SPDX-License-Identifier: GPL-2.0
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set -e
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# skip if system-wide mode is forbidden
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perf stat -a true > /dev/null 2>&1 || exit 2
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# skip if on hybrid platform
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perf stat -a -e cycles sleep 1 2>&1 | grep -e cpu_core && exit 2
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test_global_aggr()
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{
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perf stat -a --no-big-num -e cycles,instructions sleep 1 2>&1 | \
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grep -e cycles -e instructions | \
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while read num evt _hash ipc rest
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do
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# skip not counted events
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if [ "$num" = "<not" ]; then
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continue
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fi
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# save cycles count
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if [ "$evt" = "cycles" ]; then
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cyc=$num
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continue
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fi
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# skip if no cycles
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if [ -z "$cyc" ]; then
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continue
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fi
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# use printf for rounding and a leading zero
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res=`printf "%.2f" "$(echo "scale=6; $num / $cyc" | bc -q)"`
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if [ "$ipc" != "$res" ]; then
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echo "IPC is different: $res != $ipc ($num / $cyc)"
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exit 1
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fi
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done
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}
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test_no_aggr()
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{
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perf stat -a -A --no-big-num -e cycles,instructions sleep 1 2>&1 | \
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grep ^CPU | \
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while read cpu num evt _hash ipc rest
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do
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# skip not counted events
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if [ "$num" = "<not" ]; then
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continue
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fi
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# save cycles count
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if [ "$evt" = "cycles" ]; then
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results="$results $cpu:$num"
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continue
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fi
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cyc=${results##* $cpu:}
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cyc=${cyc%% *}
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# skip if no cycles
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if [ -z "$cyc" ]; then
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continue
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fi
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# use printf for rounding and a leading zero
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res=`printf "%.2f" "$(echo "scale=6; $num / $cyc" | bc -q)"`
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if [ "$ipc" != "$res" ]; then
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echo "IPC is different for $cpu: $res != $ipc ($num / $cyc)"
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exit 1
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fi
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done
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}
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test_global_aggr
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test_no_aggr
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exit 0
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