SWAMPy

✎ CARVE FLESH

EDITING: amd-ibs-swfilt.sh

#!/bin/bash
# AMD IBS software filtering

ParanoidAndNotRoot() {
  [ "$(id -u)" != 0 ] && [ "$(cat /proc/sys/kernel/perf_event_paranoid)" -gt $1 ]
}

echo "check availability of IBS swfilt"

# check if IBS PMU is available
if [ ! -d /sys/bus/event_source/devices/ibs_op ]; then
    echo "[SKIP] IBS PMU does not exist"
    exit 2
fi

# check if IBS PMU has swfilt format
if [ ! -f /sys/bus/event_source/devices/ibs_op/format/swfilt ]; then
    echo "[SKIP] IBS PMU does not have swfilt"
    exit 2
fi

echo "run perf record with modifier and swfilt"
err=0

# setting any modifiers should fail
perf record -B -e ibs_op//u -o /dev/null true 2> /dev/null
if [ $? -eq 0 ]; then
    echo "[FAIL] IBS PMU should not accept exclude_kernel"
    exit 1
fi

# setting it with swfilt should be fine
perf record -B -e ibs_op/swfilt/u -o /dev/null true
if [ $? -ne 0 ]; then
    echo "[FAIL] IBS op PMU cannot handle swfilt for exclude_kernel"
    exit 1
fi

if ! ParanoidAndNotRoot 1
then
    # setting it with swfilt=1 should be fine
    perf record -B -e ibs_op/swfilt=1/k -o /dev/null true
    if [ $? -ne 0 ]; then
        echo "[FAIL] IBS op PMU cannot handle swfilt for exclude_user"
        exit 1
    fi
else
    echo "[SKIP] not root and perf_event_paranoid too high for exclude_user"
    err=2
fi

# check ibs_fetch PMU as well
perf record -B -e ibs_fetch/swfilt/u -o /dev/null true
if [ $? -ne 0 ]; then
    echo "[FAIL] IBS fetch PMU cannot handle swfilt for exclude_kernel"
    exit 1
fi

# check system wide recording
if ! ParanoidAndNotRoot 0
then
    perf record -aB --synth=no -e ibs_op/swfilt/k -o /dev/null true
    if [ $? -ne 0 ]; then
        echo "[FAIL] IBS op PMU cannot handle swfilt in system-wide mode"
        exit 1
    fi
else
    echo "[SKIP] not root and perf_event_paranoid too high for system-wide/exclude_user"
    err=2
fi

echo "check number of samples with swfilt"

kernel_sample=$(perf record -e ibs_op/swfilt/u -o- true | perf script -i- -F misc | grep -c ^K)
if [ ${kernel_sample} -ne 0 ]; then
    echo "[FAIL] unexpected kernel samples: " ${kernel_sample}
    exit 1
fi

if ! ParanoidAndNotRoot 1
then
    user_sample=$(perf record -e ibs_fetch/swfilt/k -o- true | perf script -i- -F misc | grep -c ^U)
    if [ ${user_sample} -ne 0 ]; then
        echo "[FAIL] unexpected user samples: " ${user_sample}
        exit 1
    fi
else
    echo "[SKIP] not root and perf_event_paranoid too high for exclude_user"
    err=2
fi

exit $err

CANCEL

Name	Type	Size	Modified	Actions
↩ ..	DIR	—	—
📁 base_probe/	DIR	—	2026-07-24 06:56
📁 base_report/	DIR	—	2026-07-24 06:56
📁 common/	DIR	—	2026-07-24 06:56
📁 coresight/	DIR	—	2026-07-24 06:56
📁 lib/	DIR	—	2026-07-24 06:56
📄 amd-ibs-swfilt.sh	SH	2.4 KB	2026-07-01 20:12	EDIT
📄 annotate.sh	SH	2.8 KB	2025-09-28 21:39	EDIT
📄 attr.sh	SH	385 B	2025-09-28 21:39	EDIT
📄 buildid.sh	SH	4.1 KB	2025-09-28 21:39	EDIT
📄 daemon.sh	SH	11.3 KB	2025-09-28 21:39	EDIT
📄 diff.sh	SH	1.9 KB	2025-09-28 21:39	EDIT
📄 drm_pmu.sh	SH	1.4 KB	2025-09-28 21:39	EDIT
📄 ftrace.sh	SH	2.2 KB	2025-09-28 21:39	EDIT
📄 header.sh	SH	1.3 KB	2025-09-28 21:39	EDIT
📄 list.sh	SH	758 B	2025-09-28 21:39	EDIT
📄 lock_contention.sh	SH	9.2 KB	2026-07-01 20:12	EDIT
📄 perf-report-hierarchy.sh	SH	763 B	2025-09-28 21:39	EDIT
📄 perftool-testsuite_probe.sh	SH	604 B	2025-09-28 21:39	EDIT
📄 perftool-testsuite_report.sh	SH	578 B	2025-09-28 21:39	EDIT
📄 pipe_test.sh	SH	3.2 KB	2025-09-28 21:39	EDIT
📄 probe_vfs_getname.sh	SH	507 B	2025-09-28 21:39	EDIT
📄 record+probe_libc_inet_pton.sh	SH	3.5 KB	2025-09-28 21:39	EDIT
📄 record+script_probe_vfs_getname.sh	SH	1.6 KB	2025-09-28 21:39	EDIT
📄 record+zstd_comp_decomp.sh	SH	1.1 KB	2025-09-28 21:39	EDIT
📄 record.sh	SH	10.6 KB	2025-09-28 21:39	EDIT
📄 record_bpf_filter.sh	SH	4.4 KB	2025-09-28 21:39	EDIT
📄 record_lbr.sh	SH	3.8 KB	2026-07-01 20:12	EDIT
📄 record_offcpu.sh	SH	4.4 KB	2025-09-28 21:39	EDIT
📄 record_sideband.sh	SH	1.1 KB	2025-09-28 21:39	EDIT
📄 sched.sh	SH	2 KB	2025-09-28 21:39	EDIT
📄 script.sh	SH	2 KB	2025-09-28 21:39	EDIT
📄 stat+csv_output.sh	SH	2.1 KB	2025-09-28 21:39	EDIT
📄 stat+csv_summary.sh	SH	613 B	2025-09-28 21:39	EDIT
📄 stat+event_uniquifying.sh	SH	1.8 KB	2026-07-01 20:12	EDIT
📄 stat+json_output.sh	SH	5.4 KB	2025-09-28 21:39	EDIT
📄 stat+shadow_stat.sh	SH	2.1 KB	2025-09-28 21:39	EDIT
📄 stat+std_output.sh	SH	3.2 KB	2025-09-28 21:39	EDIT
📄 stat.sh	SH	7.2 KB	2025-09-28 21:39	EDIT
📄 stat_all_metricgroups.sh	SH	1016 B	2025-09-28 21:39	EDIT
📄 stat_all_metrics.sh	SH	2.2 KB	2025-09-28 21:39	EDIT
📄 stat_all_pfm.sh	SH	1.2 KB	2025-09-28 21:39	EDIT
📄 stat_all_pmu.sh	SH	1.7 KB	2025-09-28 21:39	EDIT
📄 stat_bpf_counters.sh	SH	2 KB	2025-09-28 21:39	EDIT
📄 stat_bpf_counters_cgrp.sh	SH	1.7 KB	2025-09-28 21:39	EDIT
📄 stat_metrics_values.sh	SH	1007 B	2025-09-28 21:39	EDIT
📄 test_arm_callgraph_fp.sh	SH	1.2 KB	2025-09-28 21:39	EDIT
📄 test_arm_coresight.sh	SH	5.7 KB	2025-09-28 21:39	EDIT
📄 test_arm_coresight_disasm.sh	SH	2 KB	2025-09-28 21:39	EDIT
📄 test_arm_spe.sh	SH	3.7 KB	2025-09-28 21:39	EDIT
📄 test_arm_spe_fork.sh	SH	1 KB	2025-09-28 21:39	EDIT
📄 test_bpf_metadata.sh	SH	1.6 KB	2025-09-28 21:39	EDIT
📄 test_brstack.sh	SH	3.4 KB	2025-09-28 21:39	EDIT
📄 test_data_symbol.sh	SH	2.5 KB	2025-09-28 21:39	EDIT
📄 test_intel_pt.sh	SH	17.3 KB	2025-09-28 21:39	EDIT
📄 test_java_symbol.sh	SH	2 KB	2025-09-28 21:39	EDIT
📄 test_perf_data_converter_json.sh	SH	1.3 KB	2025-09-28 21:39	EDIT
📄 test_stat_intel_tpebs.sh	SH	1.8 KB	2025-09-28 21:39	EDIT
📄 test_task_analyzer.sh	SH	4.8 KB	2025-09-28 21:39	EDIT
📄 test_uprobe_from_different_cu.sh	SH	1.6 KB	2025-09-28 21:39	EDIT
📄 trace+probe_vfs_getname.sh	SH	1.5 KB	2025-09-28 21:39	EDIT
📄 trace_btf_enum.sh	SH	1.8 KB	2026-07-01 20:12	EDIT
📄 trace_btf_general.sh	SH	2.2 KB	2025-09-28 21:39	EDIT
📄 trace_exit_race.sh	SH	1.3 KB	2025-09-28 21:39	EDIT
📄 trace_record_replay.sh	SH	477 B	2025-09-28 21:39	EDIT
📄 trace_summary.sh	SH	2.1 KB	2025-09-28 21:39	EDIT