[PATCH v2 4/4] examples/l3fwd_power: add cli for configurable options

[Kevin Laatz]

Add CLI options to l3fwd_power to utilize the new power APIs introduced in
this patchset. These CLI options allow the user to configure the
heuritstics made available through the new API via the l3fwd_power
application options.

Signed-off-by: Kevin Laatz <kevin.laatz at intel.com>

---
v2: add doc update for l3fwd-power
---
 .../sample_app_ug/l3_forward_power_man.rst    |  8 ++
 examples/l3fwd-power/main.c                   | 75 ++++++++++++++++++-
 2 files changed, 82 insertions(+), 1 deletion(-)

diff --git a/doc/guides/sample_app_ug/l3_forward_power_man.rst b/doc/guides/sample_app_ug/l3_forward_power_man.rst
index 2e350c45f1..b26f11a220 100644
--- a/doc/guides/sample_app_ug/l3_forward_power_man.rst
+++ b/doc/guides/sample_app_ug/l3_forward_power_man.rst
@@ -109,6 +109,14 @@ where,
 
 *   --pmd-mgmt: PMD power management mode.
 
+*   --max-empty-polls : Number of empty polls to wait before entering sleep state.
+
+*   --pause-duration: Set the duration of the pause callback (microseconds).
+
+*   --scale-freq-min: Set minimum frequency for scaling.
+
+*   --scale-freq-max: Set maximum frequency for scaling.
+
 See :doc:`l3_forward` for details.
 The L3fwd-power example reuses the L3fwd command line options.
 
diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c
index 20e5b59af9..ec2a71f02f 100644
--- a/examples/l3fwd-power/main.c
+++ b/examples/l3fwd-power/main.c
@@ -265,6 +265,10 @@ static struct rte_eth_conf port_conf = {
 };
 
 static uint32_t max_pkt_len;
+static uint32_t max_empty_polls;
+static uint32_t pause_duration;
+static uint32_t scale_freq_min;
+static uint32_t scale_freq_max;
 
 static struct rte_mempool * pktmbuf_pool[NB_SOCKETS];
 
@@ -1626,10 +1630,32 @@ print_usage(const char *prgname)
 		" empty polls, full polls, and core busyness to telemetry\n"
 		" --interrupt-only: enable interrupt-only mode\n"
 		" --pmd-mgmt MODE: enable PMD power management mode. "
-		"Currently supported modes: baseline, monitor, pause, scale\n",
+		"Currently supported modes: baseline, monitor, pause, scale\n"
+		"  --max-empty-polls MAX_EMPTY_POLLS: number of empty polls to"
+		" wait before entering sleep state\n"
+		"  --pause_duration DURATION: set the duration, in microseconds,"
+		" of the pause callback\n"
+		"  --scale-freq-min FREQ_MIN: set minimum frequency for scaling"
+		" mode for all application lcores\n"
+		"  --scale_freq_max FREQ_MAX: set maximum frequency for scaling"
+		" mode for all application lcores\n",
 		prgname);
 }
 
+static int
+parse_int(const char *opt)
+{
+	char *end = NULL;
+	unsigned long val;
+
+	/* parse integer string */
+	val = strtoul(opt, &end, 10);
+	if ((opt[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+
+	return val;
+}
+
 static int parse_max_pkt_len(const char *pktlen)
 {
 	char *end = NULL;
@@ -1803,6 +1829,10 @@ parse_ep_config(const char *q_arg)
 #define CMD_LINE_OPT_TELEMETRY "telemetry"
 #define CMD_LINE_OPT_PMD_MGMT "pmd-mgmt"
 #define CMD_LINE_OPT_MAX_PKT_LEN "max-pkt-len"
+#define CMD_LINE_OPT_MAX_EMPTY_POLLS "max-empty-poll"
+#define CMD_LINE_OPT_PAUSE_DURATION "pause-duration"
+#define CMD_LINE_OPT_SCALE_FREQ_MIN "scale-freq-min"
+#define CMD_LINE_OPT_SCALE_FREQ_MAX "scale-freq-max"
 
 /* Parse the argument given in the command line of the application */
 static int
@@ -1812,6 +1842,7 @@ parse_args(int argc, char **argv)
 	char **argvopt;
 	int option_index;
 	uint32_t limit;
+	int i;
 	char *prgname = argv[0];
 	static struct option lgopts[] = {
 		{"config", 1, 0, 0},
@@ -1825,6 +1856,10 @@ parse_args(int argc, char **argv)
 		{CMD_LINE_OPT_TELEMETRY, 0, 0, 0},
 		{CMD_LINE_OPT_INTERRUPT_ONLY, 0, 0, 0},
 		{CMD_LINE_OPT_PMD_MGMT, 1, 0, 0},
+		{CMD_LINE_OPT_MAX_EMPTY_POLLS, 1, 0, 0},
+		{CMD_LINE_OPT_PAUSE_DURATION, 1, 0, 0},
+		{CMD_LINE_OPT_SCALE_FREQ_MIN, 1, 0, 0},
+		{CMD_LINE_OPT_SCALE_FREQ_MAX, 1, 0, 0},
 		{NULL, 0, 0, 0}
 	};
 
@@ -1975,6 +2010,44 @@ parse_args(int argc, char **argv)
 				parse_ptype = 1;
 			}
 
+			if (!strncmp(lgopts[option_index].name,
+					CMD_LINE_OPT_MAX_EMPTY_POLLS,
+					sizeof(CMD_LINE_OPT_MAX_EMPTY_POLLS))) {
+				printf("Maximum empty polls configured\n");
+				max_empty_polls = parse_int(optarg);
+				rte_power_pmd_mgmt_set_emptypoll_max(max_empty_polls);
+			}
+
+			if (!strncmp(lgopts[option_index].name,
+					CMD_LINE_OPT_PAUSE_DURATION,
+					sizeof(CMD_LINE_OPT_PAUSE_DURATION))) {
+				printf("Pause duration configured\n");
+				pause_duration = parse_int(optarg);
+				rte_power_pmd_mgmt_set_pause_duration(pause_duration);
+			}
+
+			if (!strncmp(lgopts[option_index].name,
+					CMD_LINE_OPT_SCALE_FREQ_MIN,
+					sizeof(CMD_LINE_OPT_SCALE_FREQ_MIN))) {
+				printf("Scaling frequency minimum configured\n");
+				scale_freq_min = parse_int(optarg);
+				for (i = 0; i < RTE_MAX_LCORE; i++)
+					if (rte_lcore_is_enabled(i))
+						rte_power_pmd_mgmt_set_scaling_freq_min(i,
+								scale_freq_min);
+			}
+
+			if (!strncmp(lgopts[option_index].name,
+					CMD_LINE_OPT_SCALE_FREQ_MAX,
+					sizeof(CMD_LINE_OPT_SCALE_FREQ_MAX))) {
+				printf("Scaling frequency maximum configured\n");
+				scale_freq_max = parse_int(optarg);
+				for (i = 0; i < RTE_MAX_LCORE; i++)
+					if (rte_lcore_is_enabled(i))
+						rte_power_pmd_mgmt_set_scaling_freq_max(i,
+								scale_freq_max);
+			}
+
 			break;
 
 		default:
-- 
2.31.1