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ec07906bdc
The hotplug testing only tries reading a trace remote buffer, loaded before a CPU is offline. Extend this testing to cover: * A trace remote buffer loaded after a CPU is offline. * A trace remote buffer loaded before a CPU is online. Because of these added test cases, move the hotplug testing into a separate hotplug.tc file. Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Link: https://patch.msgid.link/20260401045100.3394299-3-vdonnefort@google.com Signed-off-by: Marc Zyngier <maz@kernel.org>
103 lines
1.9 KiB
Bash
103 lines
1.9 KiB
Bash
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# description: Test trace remote non-consuming read
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# requires: remotes/test
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. $TEST_DIR/remotes/functions
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test_trace()
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{
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echo 0 > tracing_on
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assert_unloaded
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echo 7 > buffer_size_kb
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echo 1 > tracing_on
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assert_loaded
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# Simple test: Emit few events and try to read them
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for i in $(seq 1 8); do
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echo $i > write_event
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done
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check_trace 1 8 trace
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#
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# Test interaction with consuming read
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#
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cat trace_pipe > /dev/null &
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pid=$!
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sleep 1
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kill $pid
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test $(wc -l < trace) -eq 0
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for i in $(seq 16 32); do
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echo $i > write_event
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done
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check_trace 16 32 trace
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#
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# Test interaction with reset
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#
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echo 0 > trace
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test $(wc -l < trace) -eq 0
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for i in $(seq 1 8); do
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echo $i > write_event
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done
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check_trace 1 8 trace
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#
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# Test interaction with lost events
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#
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# Ensure the writer is not on the reader page by reloading the buffer
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reload_remote
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# Ensure ring-buffer overflow by emitting events from the same CPU
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for cpu in $(get_cpu_ids); do
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break
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done
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events_per_page=$(($(get_page_size) / $(get_selftest_event_size))) # Approx: does not take TS into account
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nr_events=$(($events_per_page * 2))
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for i in $(seq 1 $nr_events); do
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taskset -c $cpu echo $i > write_event
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done
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id=$(sed -n -e '1s/\[[0-9]*\]\s*[0-9]*.[0-9]*: [a-z]* id=\([0-9]*\)/\1/p' trace)
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test $id -ne 1
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check_trace $id $nr_events trace
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#
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# Test per-CPU interface
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#
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echo 0 > trace
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for cpu in $(get_cpu_ids) ; do
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taskset -c $cpu echo $cpu > write_event
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done
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for cpu in $(get_cpu_ids); do
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cd per_cpu/cpu$cpu/
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check_trace $cpu $cpu trace
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cd - > /dev/null
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done
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}
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if [ -z "$SOURCE_REMOTE_TEST" ]; then
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set -e
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setup_remote_test
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test_trace
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fi
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