linux-kernel - [PATCH v4 01/14] tools/rv: Do not skip idle in trace

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Message-ID: <20250721082325.71554-2-gmonaco@redhat.com>
Date: Mon, 21 Jul 2025 10:23:11 +0200
From: Gabriele Monaco <gmonaco@...hat.com>
To: linux-kernel@...r.kernel.org,
	Steven Rostedt <rostedt@...dmis.org>,
	linux-trace-kernel@...r.kernel.org
Cc: Gabriele Monaco <gmonaco@...hat.com>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Nam Cao <namcao@...utronix.de>,
	Tomas Glozar <tglozar@...hat.com>,
	Juri Lelli <jlelli@...hat.com>,
	Clark Williams <williams@...hat.com>,
	John Kacur <jkacur@...hat.com>
Subject: [PATCH v4 01/14] tools/rv: Do not skip idle in trace

Currently, the userspace RV tool skips trace events triggered by the RV
tool itself, this can be changed by passing the parameter -s, which sets
the variable config_my_pid to 0 (instead of the tool's PID).
This has the side effect of skipping events generated by idle (PID 0).

Set config_my_pid to -1 (an invalid pid) to avoid skipping idle.

Fixes: 6d60f89691fc ("tools/rv: Add in-kernel monitor interface")
Signed-off-by: Gabriele Monaco <gmonaco@...hat.com>
---
 tools/verification/rv/src/in_kernel.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/verification/rv/src/in_kernel.c b/tools/verification/rv/src/in_kernel.c
index c0dcee795c0de..4bb746ea6e173 100644
--- a/tools/verification/rv/src/in_kernel.c
+++ b/tools/verification/rv/src/in_kernel.c
@@ -431,7 +431,7 @@ ikm_event_handler(struct trace_seq *s, struct tep_record *record,
 
 	if (config_has_id && (config_my_pid == id))
 		return 0;
-	else if (config_my_pid && (config_my_pid == pid))
+	else if (config_my_pid == pid)
 		return 0;
 
 	tep_print_event(trace_event->tep, s, record, "%16s-%-8d [%.3d] ",
@@ -734,7 +734,7 @@ static int parse_arguments(char *monitor_name, int argc, char **argv)
 			config_reactor = optarg;
 			break;
 		case 's':
-			config_my_pid = 0;
+			config_my_pid = -1;
 			break;
 		case 't':
 			config_trace = 1;
-- 
2.50.1