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54b3498d71
Update ktest example for the boot-time tracing with histogram options. Note that since the histogram option uses "trace()" action instead of "EVENT()", this updates the matching pattern too. Link: https://lkml.kernel.org/r/162856130208.203126.4458319094852152589.stgit@devnote2 Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
59 lines
1 KiB
Text
59 lines
1 KiB
Text
ftrace.event {
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task.task_newtask {
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filter = "pid < 128"
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enable
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}
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kprobes.vfs_read {
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probes = "vfs_read $arg1 $arg2"
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filter = "common_pid < 200"
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enable
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}
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synthetic.initcall_latency {
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fields = "unsigned long func", "u64 lat"
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hist {
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keys = func.sym,lat
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values = lat
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sort = lat
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}
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}
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initcall.initcall_start.hist {
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keys = func;
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var.ts0 = common_timestamp.usecs
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}
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initcall.initcall_finish.hist {
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keys = func
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var.lat = common_timestamp.usecs - $ts0
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onmatch {
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event = initcall.initcall_start
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trace = initcall_latency, func, $lat
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}
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}
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}
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ftrace.instance {
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foo {
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tracer = "function"
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ftrace.filters = "user_*"
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cpumask = 1
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options = nosym-addr
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buffer_size = 512KB
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trace_clock = mono
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event.signal.signal_deliver.actions=snapshot
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}
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bar {
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tracer = "function"
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ftrace.filters = "kernel_*"
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cpumask = 2
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trace_clock = x86-tsc
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}
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}
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ftrace.alloc_snapshot
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kernel {
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trace_options = sym-addr
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trace_event = "initcall:*"
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trace_buf_size = 1M
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ftrace = function
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ftrace_filter = "vfs*"
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}
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