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selftests: ftrace: Add inter-event hist triggers testcases
 This adds inter-event hist triggers testcases which covers following: - create/remove synthetic event - disable histogram for synthetic event - extended error support - field variable support - histogram variables - histogram trigger onmatch action - histogram trigger onmax action - histogram trigger onmatch-onmax action - simple expression support - combined histogram Here is the test result. === Ftrace unit tests === [1] event trigger - test extended error support [PASS] [2] event trigger - test field variable support [PASS] [3] event trigger - test inter-event combined histogram trigger [PASS] [4] event trigger - test inter-event histogram trigger onmatch action [PASS] [5] event trigger - test inter-event histogram trigger onmatch-onmax action [PASS] [6] event trigger - test inter-event histogram trigger onmax action [PASS] [7] event trigger - test synthetic event create remove [PASS] Link: http://lkml.kernel.org/r/e07ef1e72f7bf0f84dc87c9b736d6dc91b4b0b49.1516069914.git.tom.zanussi@linux.intel.com Signed-off-by: Rajvi Jingar <[email protected]> Signed-off-by: Tom Zanussi <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]>
1 parent 89e270c commit f06eec4

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‎tools/testing/selftests/ftrace/test.d/functions

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@@ -59,6 +59,13 @@ disable_events() {
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echo 0 > events/enable
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}
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clear_synthetic_events() { # reset all current synthetic events
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grep -v ^# synthetic_events |
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while read line; do
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echo "!$line" >> synthetic_events
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done
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}
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initialize_ftrace() { # Reset ftrace to initial-state
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# As the initial state, ftrace will be set to nop tracer,
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# no events, no triggers, no filters, no function filters,

‎tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-extended-error-support.tc

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#!/bin/sh
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# description: event trigger - test extended error support
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do_reset() {
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reset_trigger
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echo > set_event
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clear_trace
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}
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fail() { #msg
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do_reset
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echo $1
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exit_fail
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}
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if [ ! -f set_event ]; then
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echo "event tracing is not supported"
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exit_unsupported
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fi
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if [ ! -f synthetic_events ]; then
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echo "synthetic event is not supported"
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exit_unsupported
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fi
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reset_tracer
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do_reset
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echo "Test extended error support"
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echo 'hist:keys=pid:ts0=common_timestamp.usecs if comm=="ping"' > events/sched/sched_wakeup/trigger
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echo 'hist:keys=pid:ts0=common_timestamp.usecs if comm=="ping"' >> events/sched/sched_wakeup/trigger &>/dev/null
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if ! grep -q "ERROR:" events/sched/sched_wakeup/hist; then
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fail "Failed to generate extended error in histogram"
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fi
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do_reset
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exit 0

‎tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-field-variable-support.tc

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#!/bin/sh
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# description: event trigger - test field variable support
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do_reset() {
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reset_trigger
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echo > set_event
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clear_trace
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}
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fail() { #msg
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do_reset
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echo $1
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exit_fail
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}
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if [ ! -f set_event ]; then
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echo "event tracing is not supported"
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exit_unsupported
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fi
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if [ ! -f synthetic_events ]; then
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echo "synthetic event is not supported"
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exit_unsupported
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fi
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clear_synthetic_events
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reset_tracer
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do_reset
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echo "Test field variable support"
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echo 'wakeup_latency u64 lat; pid_t pid; int prio; char comm[16]' > synthetic_events
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echo 'hist:keys=comm:ts0=common_timestamp.usecs if comm=="ping"' > events/sched/sched_waking/trigger
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echo 'hist:keys=next_comm:wakeup_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_waking).wakeup_latency($wakeup_lat,next_pid,sched.sched_waking.prio,next_comm) if next_comm=="ping"' > events/sched/sched_switch/trigger
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echo 'hist:keys=pid,prio,comm:vals=lat:sort=pid,prio' > events/synthetic/wakeup_latency/trigger
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ping localhost -c 3
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if ! grep -q "ping" events/synthetic/wakeup_latency/hist; then
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fail "Failed to create inter-event histogram"
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fi
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if ! grep -q "synthetic_prio=prio" events/sched/sched_waking/hist; then
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fail "Failed to create histogram with field variable"
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fi
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echo '!hist:keys=next_comm:wakeup_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_waking).wakeup_latency($wakeup_lat,next_pid,sched.sched_waking.prio,next_comm) if next_comm=="ping"' >> events/sched/sched_switch/trigger
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if grep -q "synthetic_prio=prio" events/sched/sched_waking/hist; then
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fail "Failed to remove histogram with field variable"
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fi
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do_reset
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exit 0

‎tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-inter-event-combined-hist.tc

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#!/bin/sh
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# description: event trigger - test inter-event combined histogram trigger
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do_reset() {
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reset_trigger
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echo > set_event
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clear_trace
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}
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fail() { #msg
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do_reset
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echo $1
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exit_fail
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}
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if [ ! -f set_event ]; then
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echo "event tracing is not supported"
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exit_unsupported
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fi
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if [ ! -f synthetic_events ]; then
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echo "synthetic event is not supported"
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exit_unsupported
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fi
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reset_tracer
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do_reset
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clear_synthetic_events
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echo "Test create synthetic event"
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echo 'waking_latency u64 lat pid_t pid' > synthetic_events
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if [ ! -d events/synthetic/waking_latency ]; then
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fail "Failed to create waking_latency synthetic event"
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fi
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echo "Test combined histogram"
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echo 'hist:keys=pid:ts0=common_timestamp.usecs if comm=="ping"' > events/sched/sched_waking/trigger
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echo 'hist:keys=pid:waking_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_waking).waking_latency($waking_lat,pid) if comm=="ping"' > events/sched/sched_wakeup/trigger
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echo 'hist:keys=pid,lat:sort=pid,lat' > events/synthetic/waking_latency/trigger
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echo 'wakeup_latency u64 lat pid_t pid' >> synthetic_events
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echo 'hist:keys=pid:ts1=common_timestamp.usecs if comm=="ping"' >> events/sched/sched_wakeup/trigger
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echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts1:onmatch(sched.sched_wakeup).wakeup_latency($wakeup_lat,next_pid) if next_comm=="ping"' > events/sched/sched_switch/trigger
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echo 'waking+wakeup_latency u64 lat; pid_t pid' >> synthetic_events
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echo 'hist:keys=pid,lat:sort=pid,lat:ww_lat=$waking_lat+$wakeup_lat:onmatch(synthetic.wakeup_latency).waking+wakeup_latency($ww_lat,pid)' >> events/synthetic/wakeup_latency/trigger
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echo 'hist:keys=pid,lat:sort=pid,lat' >> events/synthetic/waking+wakeup_latency/trigger
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ping localhost -c 3
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if ! grep -q "pid:" events/synthetic/waking+wakeup_latency/hist; then
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fail "Failed to create combined histogram"
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fi
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do_reset
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exit 0

‎tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-onmatch-action-hist.tc

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#!/bin/sh
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# description: event trigger - test inter-event histogram trigger onmatch action
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do_reset() {
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reset_trigger
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echo > set_event
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clear_trace
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}
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fail() { #msg
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do_reset
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echo $1
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exit_fail
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}
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if [ ! -f set_event ]; then
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echo "event tracing is not supported"
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exit_unsupported
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fi
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if [ ! -f synthetic_events ]; then
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echo "synthetic event is not supported"
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exit_unsupported
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fi
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clear_synthetic_events
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reset_tracer
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do_reset
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echo "Test create synthetic event"
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echo 'wakeup_latency u64 lat pid_t pid char comm[16]' > synthetic_events
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if [ ! -d events/synthetic/wakeup_latency ]; then
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fail "Failed to create wakeup_latency synthetic event"
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fi
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echo "Test create histogram for synthetic event"
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echo "Test histogram variables,simple expression support and onmatch action"
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echo 'hist:keys=pid:ts0=common_timestamp.usecs if comm=="ping"' > events/sched/sched_wakeup/trigger
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echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_wakeup).wakeup_latency($wakeup_lat,next_pid,next_comm) if next_comm=="ping"' > events/sched/sched_switch/trigger
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echo 'hist:keys=comm,pid,lat:wakeup_lat=lat:sort=lat' > events/synthetic/wakeup_latency/trigger
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ping localhost -c 5
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if ! grep -q "ping" events/synthetic/wakeup_latency/hist; then
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fail "Failed to create onmatch action inter-event histogram"
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fi
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do_reset
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exit 0

‎tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-onmatch-onmax-action-hist.tc

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#!/bin/sh
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# description: event trigger - test inter-event histogram trigger onmatch-onmax action
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do_reset() {
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reset_trigger
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echo > set_event
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clear_trace
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}
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fail() { #msg
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do_reset
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echo $1
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exit_fail
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}
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if [ ! -f set_event ]; then
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echo "event tracing is not supported"
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exit_unsupported
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fi
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if [ ! -f synthetic_events ]; then
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echo "synthetic event is not supported"
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exit_unsupported
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fi
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clear_synthetic_events
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reset_tracer
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do_reset
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echo "Test create synthetic event"
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echo 'wakeup_latency u64 lat pid_t pid char comm[16]' > synthetic_events
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if [ ! -d events/synthetic/wakeup_latency ]; then
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fail "Failed to create wakeup_latency synthetic event"
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fi
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echo "Test create histogram for synthetic event"
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echo "Test histogram variables,simple expression support and onmatch-onmax action"
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echo 'hist:keys=pid:ts0=common_timestamp.usecs if comm=="ping"' > events/sched/sched_wakeup/trigger
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echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_wakeup).wakeup_latency($wakeup_lat,next_pid,next_comm):onmax($wakeup_lat).save(next_comm,prev_pid,prev_prio,prev_comm) if next_comm=="ping"' >> events/sched/sched_switch/trigger
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echo 'hist:keys=comm,pid,lat:wakeup_lat=lat:sort=lat' > events/synthetic/wakeup_latency/trigger
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ping localhost -c 5
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if [ ! grep -q "ping" events/synthetic/wakeup_latency/hist -o ! grep -q "max:" events/sched/sched_switch/hist]; then
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fail "Failed to create onmatch-onmax action inter-event histogram"
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fi
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do_reset
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exit 0

‎tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-onmax-action-hist.tc

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#!/bin/sh
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# description: event trigger - test inter-event histogram trigger onmax action
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do_reset() {
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reset_trigger
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echo > set_event
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clear_trace
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}
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fail() { #msg
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do_reset
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echo $1
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exit_fail
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}
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if [ ! -f set_event ]; then
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echo "event tracing is not supported"
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exit_unsupported
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fi
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if [ ! -f synthetic_events ]; then
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echo "synthetic event is not supported"
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exit_unsupported
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fi
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clear_synthetic_events
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reset_tracer
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do_reset
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echo "Test create synthetic event"
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echo 'wakeup_latency u64 lat pid_t pid char comm[16]' > synthetic_events
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if [ ! -d events/synthetic/wakeup_latency ]; then
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fail "Failed to create wakeup_latency synthetic event"
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fi
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echo "Test onmax action"
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echo 'hist:keys=pid:ts0=common_timestamp.usecs if comm=="ping"' >> events/sched/sched_waking/trigger
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echo 'hist:keys=next_pid:wakeup_lat=common_timestamp.usecs-$ts0:onmax($wakeup_lat).save(next_comm,prev_pid,prev_prio,prev_comm) if next_comm=="ping"' >> events/sched/sched_switch/trigger
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ping localhost -c 3
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if ! grep -q "max:" events/sched/sched_switch/hist; then
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fail "Failed to create onmax action inter-event histogram"
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fi
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do_reset
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exit 0

‎tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-event-createremove.tc

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#!/bin/sh
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# description: event trigger - test synthetic event create remove
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do_reset() {
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reset_trigger
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echo > set_event
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clear_trace
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}
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fail() { #msg
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do_reset
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echo $1
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exit_fail
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}
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if [ ! -f set_event ]; then
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echo "event tracing is not supported"
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exit_unsupported
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fi
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if [ ! -f synthetic_events ]; then
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echo "synthetic event is not supported"
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exit_unsupported
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fi
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clear_synthetic_events
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reset_tracer
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do_reset
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echo "Test create synthetic event"
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echo 'wakeup_latency u64 lat pid_t pid char comm[16]' > synthetic_events
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if [ ! -d events/synthetic/wakeup_latency ]; then
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fail "Failed to create wakeup_latency synthetic event"
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fi
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reset_trigger
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echo "Test create synthetic event with an error"
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echo 'wakeup_latency u64 lat pid_t pid char' > synthetic_events > /dev/null
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if [ -d events/synthetic/wakeup_latency ]; then
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fail "Created wakeup_latency synthetic event with an invalid format"
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fi
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reset_trigger
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echo "Test remove synthetic event"
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echo '!wakeup_latency u64 lat pid_t pid char comm[16]' > synthetic_events
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if [ -d events/synthetic/wakeup_latency ]; then
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fail "Failed to delete wakeup_latency synthetic event"
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fi
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do_reset
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exit 0

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