linux-kernel - [PATCH v4 10/10] bootconfig/tracing/ktest: Update ktest example for boot-time tracing

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Date:   Tue, 10 Aug 2021 11:08:22 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     linux-kernel@...r.kernel.org, Tom Zanussi <zanussi@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>
Subject: [PATCH v4 10/10] 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.

Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
---
 .../ktest/examples/bootconfigs/boottrace.bconf     |   20 +++++++++++++++-----
 .../ktest/examples/bootconfigs/verify-boottrace.sh |    2 +-
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/tools/testing/ktest/examples/bootconfigs/boottrace.bconf b/tools/testing/ktest/examples/bootconfigs/boottrace.bconf
index 9db64ec589d5..7aa706cccb3b 100644
--- a/tools/testing/ktest/examples/bootconfigs/boottrace.bconf
+++ b/tools/testing/ktest/examples/bootconfigs/boottrace.bconf
@@ -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_start.hist {
+		keys = func;
+		var.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_finish.hist {
+		keys = func
+		var.lat = common_timestamp.usecs - $ts0
+		onmatch {
+			event = initcall.initcall_start
+			trace = initcall_latency, func, $lat
+		}
 	}
 }
 
diff --git a/tools/testing/ktest/examples/bootconfigs/verify-boottrace.sh b/tools/testing/ktest/examples/bootconfigs/verify-boottrace.sh
index f271940ce7fb..233e95cfcf20 100755
--- a/tools/testing/ktest/examples/bootconfigs/verify-boottrace.sh
+++ b/tools/testing/ktest/examples/bootconfigs/verify-boottrace.sh
@@ -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"