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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Cc: "Edmund Henniges" <eh@emlix.com>, "Daniel Glöckner" <dg@emlix.com>
Subject: [PATCH 06/19] poller: Add a poller command
Date: Thu, 12 Mar 2020 09:35:42 +0100	[thread overview]
Message-ID: <20200312083555.10793-7-s.hauer@pengutronix.de> (raw)
In-Reply-To: <20200312083555.10793-1-s.hauer@pengutronix.de>

The poller command allows to print which pollers are registered and also
how many times we can run the registered pollers in one second.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 commands/Kconfig |  9 ++++++
 common/poller.c  | 71 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 80 insertions(+)

diff --git a/commands/Kconfig b/commands/Kconfig
index 7784966282..665eb470b1 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -260,6 +260,15 @@ config CMD_MMC_EXTCSD
 		  -y      don't request when writing to one time programmable fields
 		  __CAUTION__: this could damage the device!
 
+config CMD_POLLER
+	tristate
+	prompt "poller"
+	depends on POLLER
+	help
+	  Pollers are functions that are running in the background whenever code executes
+	  is_timeout() or one of the various delay functions. The poller command prints
+	  informations about registered pollers.
+
 # end Information commands
 endmenu
 
diff --git a/common/poller.c b/common/poller.c
index b1a2122f91..95f828b439 100644
--- a/common/poller.c
+++ b/common/poller.c
@@ -121,3 +121,74 @@ void poller_call(void)
 
 	poller_active = 0;
 }
+
+#if defined CONFIG_CMD_POLLER
+
+#include <command.h>
+#include <getopt.h>
+
+static void poller_time(void)
+{
+	uint64_t start = get_time_ns();
+	int i = 0;
+
+	/*
+	 * How many times we can run the registered pollers in one second?
+	 *
+	 * A low number here may point to problems with pollers taking too
+	 * much time.
+	 */
+	while (!is_timeout(start, SECOND))
+		i++;
+
+	printf("%d poller calls in 1s\n", i);
+}
+
+static void poller_info(void)
+{
+	struct poller_struct *poller;
+
+	printf("Registered pollers:\n");
+
+	if (list_empty(&poller_list)) {
+		printf("<none>\n");
+		return;
+	}
+
+	list_for_each_entry(poller, &poller_list, list)
+		printf("%s\n", poller->name);
+}
+
+BAREBOX_CMD_HELP_START(poller)
+BAREBOX_CMD_HELP_TEXT("print info about registered pollers")
+BAREBOX_CMD_HELP_TEXT("")
+BAREBOX_CMD_HELP_TEXT("Options:")
+BAREBOX_CMD_HELP_OPT ("-i", "Print information about registered pollers")
+BAREBOX_CMD_HELP_OPT ("-t", "measure how many pollers we run in 1s")
+BAREBOX_CMD_HELP_END
+
+static int do_poller(int argc, char *argv[])
+{
+	int opt;
+
+	while ((opt = getopt(argc, argv, "it")) > 0) {
+		switch (opt) {
+		case 'i':
+			poller_info();
+			return 0;
+		case 't':
+			poller_time();
+			return 0;
+		}
+	}
+
+	return COMMAND_ERROR_USAGE;
+}
+
+BAREBOX_CMD_START(poller)
+	.cmd = do_poller,
+	BAREBOX_CMD_DESC("print info about registered pollers")
+	BAREBOX_CMD_GROUP(CMD_GRP_MISC)
+	BAREBOX_CMD_HELP(cmd_poller_help)
+BAREBOX_CMD_END
+#endif
-- 
2.25.1


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  parent reply	other threads:[~2020-03-12  8:37 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-12  8:35 [PATCH v3 00/19] Protect code from pollers Sascha Hauer
2020-03-12  8:35 ` [PATCH 01/19] net: fec_imx: Do not clear MII interrupt during receive Sascha Hauer
2020-03-12  8:35 ` [PATCH 02/19] miitool: Use mdiobus_read() Sascha Hauer
2020-03-12  8:35 ` [PATCH 03/19] net: phy: mdio-mux: Use mdiobus_read/write() Sascha Hauer
2020-03-12  8:35 ` [PATCH 04/19] net: Open ethernet devices explicitly Sascha Hauer
2020-03-12  8:35 ` [PATCH 05/19] poller: Give pollers a name Sascha Hauer
2020-03-12  8:35 ` Sascha Hauer [this message]
2020-03-12  8:35 ` [PATCH 07/19] Introduce slices Sascha Hauer
2020-03-12  8:35 ` [PATCH 08/19] net: Add a slice to struct eth_device Sascha Hauer
2020-03-12  8:35 ` [PATCH 09/19] net: mdiobus: Add slice Sascha Hauer
2020-03-12  8:35 ` [PATCH 10/19] usb: Add a slice to usb host controllers Sascha Hauer
2020-03-12  8:35 ` [PATCH 11/19] usbnet: Add slice Sascha Hauer
2020-03-12  8:35 ` [PATCH 12/19] net: Call net_poll() in a poller Sascha Hauer
2020-03-12  8:35 ` [PATCH 13/19] net: reply to ping requests Sascha Hauer
2020-03-12  8:35 ` [PATCH 14/19] usbnet: Be more friendly in the receive path Sascha Hauer
2020-03-12  8:35 ` [PATCH 15/19] net: phy: Also print link down messages Sascha Hauer
2020-03-12  8:35 ` [PATCH 16/19] net: ifup command: add ethernet device completion Sascha Hauer
2020-03-12  8:35 ` [PATCH 17/19] net: phy: Do not claim the link is up initially Sascha Hauer
2020-03-12  8:35 ` [PATCH 18/19] net: Add ifdown support and command Sascha Hauer
2020-03-12  8:35 ` [PATCH 19/19] poller: Allow to run pollers inside of pollers Sascha Hauer
2020-03-12 22:36   ` Daniel Glöckner
2020-03-16  8:04     ` Sascha Hauer
2020-04-07 19:28       ` Daniel Glöckner
2020-04-22  7:40         ` Sascha Hauer
2020-05-08 17:42           ` Daniel Glöckner

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