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authorSascha Hauer <s.hauer@pengutronix.de>2020-03-12 09:07:33 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2020-05-20 15:43:58 +0200
commit754f2e0d106d44dc89fdb4edbb54641d9525e62c (patch)
treeaf04b8e1301f726bc836e0e308cf6ec7dc0892e1
parent932fff4911529d3663fa01b99cfb5dddb42feb6e (diff)
downloadbarebox-754f2e0d106d44dc89fdb4edbb54641d9525e62c.tar.gz
poller: Add a poller command
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>
-rw-r--r--commands/Kconfig9
-rw-r--r--common/poller.c71
2 files changed, 80 insertions, 0 deletions
diff --git a/commands/Kconfig b/commands/Kconfig
index 8de98ef..3789f33 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -244,6 +244,15 @@ 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 b1a2122..95f828b 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