Commit 54b3498d authored by Masami Hiramatsu's avatar Masami Hiramatsu Committed by Steven Rostedt (VMware)
Browse files

bootconfig/tracing/ktest: Update ktest example for boot-time tracing 

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: default avatarMasami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
parent 1eaad3ac

tools/testing/ktest/examples/bootconfigs/boottrace.bconf

+15 −5
Original line number Diff line number Diff line
@@ -10,13 +10,23 @@ ftrace.event { 
	}

	synthetic.initcall_latency {

		fields = "unsigned long func", "u64 lat"

		actions = "hist:keys=func.sym,lat:vals=lat:sort=lat"

		hist {

			keys = func.sym,lat

			values = lat

			sort = lat

		}

	initcall.initcall_start {

		actions = "hist:keys=func:ts0=common_timestamp.usecs"

	}

	initcall.initcall_finish {

		actions = "hist:keys=func:lat=common_timestamp.usecs-$ts0:onmatch(initcall.initcall_start).initcall_latency(func,$lat)"

	initcall.initcall_start.hist {

		keys = func;

		var.ts0 = common_timestamp.usecs

	}

	initcall.initcall_finish.hist {

		keys = func

		var.lat = common_timestamp.usecs - $ts0

		onmatch {

			event = initcall.initcall_start

			trace = initcall_latency, func, $lat

		}

	}

}

tools/testing/ktest/examples/bootconfigs/verify-boottrace.sh

+1 −1
Original line number Diff line number Diff line
@@ -58,7 +58,7 @@ compare_file_partial "events/synthetic/initcall_latency/enable" "0" 
compare_file_partial "events/initcall/initcall_start/trigger" "hist:keys=func:vals=hitcount:ts0=common_timestamp.usecs"

compare_file_partial "events/initcall/initcall_start/enable" "1"



compare_file_partial "events/initcall/initcall_finish/trigger" 'hist:keys=func:vals=hitcount:lat=common_timestamp.usecs-\$ts0:sort=hitcount:size=2048:clock=global:onmatch(initcall.initcall_start).initcall_latency(func,\$lat)'

compare_file_partial "events/initcall/initcall_finish/trigger" 'hist:keys=func:vals=hitcount:lat=common_timestamp.usecs-\$ts0:sort=hitcount:size=2048:clock=global:onmatch(initcall.initcall_start).trace(initcall_latency,func,\$lat)'

compare_file_partial "events/initcall/initcall_finish/enable" "1"



compare_file "instances/foo/current_tracer" "function"