tools/perf/tests/shell/stat_bpf_counters.sh

Source file repositories/reference/linux-study-clean/tools/perf/tests/shell/stat_bpf_counters.sh

File Facts

System
Linux kernel
Corpus path
tools/perf/tests/shell/stat_bpf_counters.sh
Extension
.sh
Size
2517 bytes
Lines
87
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

if ($1 != "<not") { i++; c += $1 } \
				} END { if (i > 0) printf "%.0f", c; else print "<not" }')
	bpf_instructions=$(perf stat --no-big-num --bpf-counters -e instructions -- $workload  2>&1 | \
				awk -v i=0 -v c=0 '/instructions/ { \
					if ($1 != "<not") { i++; c += $1 } \
				} END { if (i > 0) printf "%.0f", c; else print "<not" }')
	check_counts $base_instructions $bpf_instructions
	compare_number $base_instructions $bpf_instructions
	echo "[Success]"
}

test_bpf_modifier()
{
	printf "Testing bpf event modifier "
	stat_output=$(perf stat --no-big-num -e instructions/name=base_instructions/,instructions/name=bpf_instructions/b -- $workload 2>&1)
	base_instructions=$(echo "$stat_output"| \
				awk -v i=0 -v c=0 '/base_instructions/ { \
					if ($1 != "<not") { i++; c += $1 } \
				} END { if (i > 0) printf "%.0f", c; else print "<not" }')
	bpf_instructions=$(echo "$stat_output"| \
				awk -v i=0 -v c=0 '/bpf_instructions/ { \
					if ($1 != "<not") { i++; c += $1 } \
				} END { if (i > 0) printf "%.0f", c; else print "<not" }')
	check_counts $base_instructions $bpf_instructions
	compare_number $base_instructions $bpf_instructions
	echo "[Success]"
}

# skip if --bpf-counters is not supported
if ! perf stat -e instructions --bpf-counters true > /dev/null 2>&1; then
	if [ "$1" = "-v" ]; then
		echo "Skipping: --bpf-counters not supported"
		perf --no-pager stat -e instructions --bpf-counters true || true
	fi
	exit 2
fi

test_bpf_counters
test_bpf_modifier

exit 0

Annotation

Implementation Notes