[PATCH v8 3/3] app/testpmd: add sleep command

[Anatoly Burakov <anatoly.burakov@intel.com>]

Test-pmd already has a way to run a list of commands from file, but there
is no way to pause execution for a specified amount of time between two
commands. This may be necessary for simple automation, particularly for
waiting on some asynchronous operation such as link status update.

Add a simple sleep command to wait until certain number of seconds has
passed, using the newly added cmdline library floating point support.

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
---

Notes:
    v1 -> v2:
    - Add floating point support to cmdline
    - Use floating point format for pause command

 app/test-pmd/cmdline.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index d4bb3ec998..b6152c07e6 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -151,6 +151,9 @@ static void cmd_help_long_parsed(void *parsed_result,
 
 			"quit\n"
 			"    Quit to prompt.\n\n"
+
+			"sleep secs\n"
+			"    Sleep for secs seconds (can be fractional).\n\n"
 		);
 	}
 
@@ -7768,6 +7771,37 @@ static cmdline_parse_inst_t cmd_quit = {
 	},
 };
 
+/* *** SLEEP *** */
+struct cmd_sleep_result {
+	cmdline_fixed_string_t sleep;
+	double secs;
+};
+
+static void cmd_sleep_parsed(void *parsed_result,
+	__rte_unused struct cmdline *cl,
+	__rte_unused void *data)
+{
+	struct cmd_sleep_result *res = parsed_result;
+
+	rte_delay_us_sleep(res->secs * 1E6);
+}
+
+static cmdline_parse_token_string_t cmd_sleep_sleep =
+	TOKEN_STRING_INITIALIZER(struct cmd_sleep_result, sleep, "sleep");
+static cmdline_parse_token_num_t cmd_sleep_seconds =
+	TOKEN_NUM_INITIALIZER(struct cmd_sleep_result, secs, RTE_FLOAT_DOUBLE);
+
+static cmdline_parse_inst_t cmd_sleep = {
+	.f = cmd_sleep_parsed,
+	.data = NULL,
+	.help_str = "sleep <secs>: Sleep for a specified number of seconds",
+	.tokens = {
+		(void *)&cmd_sleep_sleep,
+		(void *)&cmd_sleep_seconds,
+		NULL,
+	},
+};
+
 /* *** ADD/REMOVE MAC ADDRESS FROM A PORT *** */
 struct cmd_mac_addr_result {
 	cmdline_fixed_string_t mac_addr_cmd;
@@ -13711,6 +13745,7 @@ static cmdline_parse_ctx_t builtin_ctx[] = {
 	&cmd_showdevice,
 	&cmd_showcfg,
 	&cmd_showfwdall,
+	&cmd_sleep,
 	&cmd_start,
 	&cmd_start_tx_first,
 	&cmd_start_tx_first_n,
-- 
2.47.1