From: Daniel Bristot de Oliveira <bristot@kernel.org>
To: Daniel Bristot de Oliveira <bristot@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Jonathan Corbet <corbet@lwn.net>
Cc: Juri Lelli <juri.lelli@redhat.com>,
Clark Williams <williams@redhat.com>,
linux-trace-devel@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 1/6] rtla/osnoise: Add helper functions to manipulate osnoise/options
Date: Tue, 10 Jan 2023 21:08:02 +0100 [thread overview]
Message-ID: <9bc53eae8804b4068a7e3f3e2b0b7c5a3e023c99.1673380089.git.bristot@kernel.org> (raw)
In-Reply-To: <cover.1673380089.git.bristot@kernel.org>
Add some helper functions to read and set the on/off osnoise/options.
No usage in this patch.
In preparation for hwnoise tool.
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Cc: Daniel Bristot de Oliveira <bristot@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jonathan Corbet <corbet@lwn.net>
---
tools/tracing/rtla/src/osnoise.c | 108 +++++++++++++++++++++++++++++++
1 file changed, 108 insertions(+)
diff --git a/tools/tracing/rtla/src/osnoise.c b/tools/tracing/rtla/src/osnoise.c
index 4dee343909b1..050a9997191c 100644
--- a/tools/tracing/rtla/src/osnoise.c
+++ b/tools/tracing/rtla/src/osnoise.c
@@ -734,6 +734,114 @@ void osnoise_put_tracing_thresh(struct osnoise_context *context)
context->orig_tracing_thresh = OSNOISE_OPTION_INIT_VAL;
}
+static int osnoise_options_get_option(char *option)
+{
+ char *options = tracefs_instance_file_read(NULL, "osnoise/options", NULL);
+ char no_option[128];
+ int retval = 0;
+ char *opt;
+
+ if (!options)
+ return OSNOISE_OPTION_INIT_VAL;
+
+ /*
+ * Check first if the option is disabled.
+ */
+ snprintf(no_option, sizeof(no_option), "NO_%s", option);
+
+ opt = strstr(options, no_option);
+ if (opt)
+ goto out_free;
+
+ /*
+ * Now that it is not disabled, if the string is there, it is
+ * enabled. If the string is not there, the option does not exist.
+ */
+ opt = strstr(options, option);
+ if (opt)
+ retval = 1;
+ else
+ retval = OSNOISE_OPTION_INIT_VAL;
+
+out_free:
+ free(options);
+ return retval;
+}
+
+static int osnoise_options_set_option(char *option, bool onoff)
+{
+ char no_option[128];
+
+ if (onoff)
+ return tracefs_instance_file_write(NULL, "osnoise/options", option);
+
+ snprintf(no_option, sizeof(no_option), "NO_%s", option);
+
+ return tracefs_instance_file_write(NULL, "osnoise/options", no_option);
+}
+
+#define OSNOISE_OPTION(name, option_str) \
+static int osnoise_get_##name(struct osnoise_context *context) \
+{ \
+ if (context->opt_##name != OSNOISE_OPTION_INIT_VAL) \
+ return context->opt_##name; \
+ \
+ if (context->orig_opt_##name != OSNOISE_OPTION_INIT_VAL) \
+ return context->orig_opt_##name; \
+ \
+ context->orig_opt_##name = osnoise_options_get_option(option_str); \
+ \
+ return context->orig_opt_##name; \
+} \
+ \
+int osnoise_set_##name(struct osnoise_context *context, bool onoff) \
+{ \
+ int opt_##name = osnoise_get_##name(context); \
+ int retval; \
+ \
+ if (opt_##name == OSNOISE_OPTION_INIT_VAL) \
+ return -1; \
+ \
+ if (opt_##name == onoff) \
+ return 0; \
+ \
+ retval = osnoise_options_set_option(option_str, onoff); \
+ if (retval < 0) \
+ return -1; \
+ \
+ context->opt_##name = onoff; \
+ \
+ return 0; \
+} \
+ \
+static void osnoise_restore_##name(struct osnoise_context *context) \
+{ \
+ int retval; \
+ \
+ if (context->orig_opt_##name == OSNOISE_OPTION_INIT_VAL) \
+ return; \
+ \
+ if (context->orig_opt_##name == context->opt_##name) \
+ goto out_done; \
+ \
+ retval = osnoise_options_set_option(option_str, context->orig_opt_##name); \
+ if (retval < 0) \
+ err_msg("Could not restore original osnoise " #option_str " option\n"); \
+ \
+out_done: \
+ context->orig_opt_##name = OSNOISE_OPTION_INIT_VAL; \
+} \
+ \
+static void osnoise_put_##name(struct osnoise_context *context) \
+{ \
+ osnoise_restore_##name(context); \
+ \
+ if (context->orig_opt_##name == OSNOISE_OPTION_INIT_VAL) \
+ return; \
+ \
+ context->orig_opt_##name = OSNOISE_OPTION_INIT_VAL; \
+}
+
/*
* enable_osnoise - enable osnoise tracer in the trace_instance
*/
--
2.38.1
next prev parent reply other threads:[~2023-01-10 20:08 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-10 20:08 [PATCH 0/6] rtla: Add hwnoise tool Daniel Bristot de Oliveira
2023-01-10 20:08 ` Daniel Bristot de Oliveira [this message]
2023-01-10 20:08 ` [PATCH 2/6] rtla/osnoise: Add OSNOISE_IRQ_DISABLE option Daniel Bristot de Oliveira
2023-01-10 20:08 ` [PATCH 3/6] rtla/osnoise: Add the mode abstraction Daniel Bristot de Oliveira
2023-01-10 20:08 ` [PATCH 4/6] rtla/osnoise_top: Pass the params to the usage function Daniel Bristot de Oliveira
2023-01-10 20:08 ` [PATCH 5/6] rtla: Add hwnoise tool Daniel Bristot de Oliveira
2023-01-10 20:08 ` [PATCH 6/6] Documentation/rtla: Add hwnoise man page Daniel Bristot de Oliveira
2023-01-11 6:33 ` kernel test robot
2023-01-12 4:12 ` Bagas Sanjaya
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=9bc53eae8804b4068a7e3f3e2b0b7c5a3e023c99.1673380089.git.bristot@kernel.org \
--to=bristot@kernel.org \
--cc=corbet@lwn.net \
--cc=juri.lelli@redhat.com \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-trace-devel@vger.kernel.org \
--cc=rostedt@goodmis.org \
--cc=williams@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.