linux-kernel - [RESEND PATCH v3 1/2] perf trace beauty: Always show param if show

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Date: Wed, 22 May 2024 11:35:41 +0800
From: Changbin Du <changbin.du@...wei.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim
	<namhyung@...nel.org>
CC: Mark Rutland <mark.rutland@....com>, Alexander Shishkin
	<alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, Ian
 Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, "Liang,
 Kan" <kan.liang@...ux.intel.com>, <linux-perf-users@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Changbin Du <changbin.du@...wei.com>
Subject: [RESEND PATCH v3 1/2] perf trace beauty: Always show param if show_zero is set

For some parameters, it is best to also display them when they are 0,
e.g. flags.

Here we only check the show_zero property and let arg printer handle
special cases.

Signed-off-by: Changbin Du <changbin.du@...wei.com>
---
 tools/perf/builtin-trace.c | 29 +++++++----------------------
 1 file changed, 7 insertions(+), 22 deletions(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index e5fef39c34bf..915dcd258002 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2091,17 +2091,11 @@ static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
 			val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val);
 
 			/*
- 			 * Suppress this argument if its value is zero and
- 			 * and we don't have a string associated in an
- 			 * strarray for it.
- 			 */
-			if (val == 0 &&
-			    !trace->show_zeros &&
-			    !(sc->arg_fmt &&
-			      (sc->arg_fmt[arg.idx].show_zero ||
-			       sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY ||
-			       sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) &&
-			      sc->arg_fmt[arg.idx].parm))
+			 * Suppress this argument if its value is zero and show_zero
+			 * property isn't set.
+			 */
+			if (val == 0 && !trace->show_zeros &&
+			    !(sc->arg_fmt && sc->arg_fmt[arg.idx].show_zero))
 				continue;
 
 			printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
@@ -2796,17 +2790,8 @@ static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel,
 		 */
 		val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val);
 
-		/*
-		 * Suppress this argument if its value is zero and
-		 * we don't have a string associated in an
-		 * strarray for it.
-		 */
-		if (val == 0 &&
-		    !trace->show_zeros &&
-		    !((arg->show_zero ||
-		       arg->scnprintf == SCA_STRARRAY ||
-		       arg->scnprintf == SCA_STRARRAYS) &&
-		      arg->parm))
+		/* Suppress this argument if its value is zero and show_zero property isn't set. */
+		if (val == 0 && !trace->show_zeros && !arg->show_zero)
 			continue;
 
 		printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : "");
-- 
2.34.1