[PATCH] app/procinfo: add xstats parameter to hide zero

[Dengdui Huang <huangdengdui@huawei.com>]

The number of xstats may be large, after the hide zero parameter to
hide zero only non-zero values can be displayed.

So display xstats with hide zero:
    dpdk-proc-info --proc-type=secondary -- --xstats
and without hide zero:
    dpdk-proc-info --proc-type=secondary -- --xstats=hide_zero

Signed-off-by: Dengdui Huang <huangdengdui@huawei.com>
Acked-by: Chengwen Feng <fengchengwen@huawei.com>
---
 app/proc-info/main.c           | 20 ++++++++++++++------
 doc/guides/tools/proc_info.rst |  7 ++++---
 2 files changed, 18 insertions(+), 9 deletions(-)

diff --git a/app/proc-info/main.c b/app/proc-info/main.c
index e1272164b1..cc0f71c229 100644
--- a/app/proc-info/main.c
+++ b/app/proc-info/main.c
@@ -61,6 +61,7 @@ static unsigned long enabled_port_mask;
 static uint32_t enable_stats;
 /* Enable xstats. */
 static uint32_t enable_xstats;
+static bool xstats_hide_zero = false;
 /* Enable collectd format */
 static uint32_t enable_collectd_format;
 /* FD to send collectd format messages to STDOUT */
@@ -162,8 +163,8 @@ proc_info_usage(const char *prgname)
 		"  -m to display DPDK memory zones, segments and TAILQ information\n"
 		"  -p PORTMASK: hexadecimal bitmask of ports to retrieve stats for\n"
 		"  --stats: to display port statistics, enabled by default\n"
-		"  --xstats: to display extended port statistics, disabled by "
-			"default\n"
+		"  --xstats[=hide_zero]: to display extended port statistics, disabled by default, "
+			"support hide zero.\n"
 #ifdef RTE_LIB_METRICS
 		"  --metrics: to display derived metrics of the ports, disabled by "
 			"default\n"
@@ -425,7 +426,7 @@ proc_info_parse_args(int argc, char **argv)
 	static struct option long_option[] = {
 		{"stats", 0, NULL, 0},
 		{"stats-reset", 0, NULL, 0},
-		{"xstats", 0, NULL, 0},
+		{"xstats", optional_argument, NULL, 0},
 #ifdef RTE_LIB_METRICS
 		{"metrics", 0, NULL, 0},
 #endif
@@ -476,12 +477,17 @@ proc_info_parse_args(int argc, char **argv)
 		case 0:
 			/* Print stats */
 			if (!strncmp(long_option[option_index].name, "stats",
-					MAX_LONG_OPT_SZ))
+					MAX_LONG_OPT_SZ)) {
 				enable_stats = 1;
 			/* Print xstats */
-			else if (!strncmp(long_option[option_index].name, "xstats",
-					MAX_LONG_OPT_SZ))
+			} else if (!strncmp(long_option[option_index].name, "xstats",
+					MAX_LONG_OPT_SZ)) {
 				enable_xstats = 1;
+				if (optarg != NULL && !strncmp(optarg, "hide_zero",
+				    MAX_LONG_OPT_SZ))
+					xstats_hide_zero = true;
+
+			}
 #ifdef RTE_LIB_METRICS
 			else if (!strncmp(long_option[option_index].name,
 					"metrics",
@@ -850,6 +856,8 @@ nic_xstats_display(uint16_t port_id)
 	}
 
 	for (i = 0; i < len; i++) {
+		if (xstats_hide_zero && values[i] == 0)
+			continue;
 		if (enable_collectd_format) {
 			char counter_type[MAX_STRING_LEN];
 			char buf[MAX_STRING_LEN];
diff --git a/doc/guides/tools/proc_info.rst b/doc/guides/tools/proc_info.rst
index bb483afbce..e623d71785 100644
--- a/doc/guides/tools/proc_info.rst
+++ b/doc/guides/tools/proc_info.rst
@@ -17,7 +17,7 @@ The application has a number of command line options:
 
 .. code-block:: console
 
-   ./<build_dir>/app/dpdk-proc-info -- -m | [-p PORTMASK] [--stats | --xstats |
+   ./<build_dir>/app/dpdk-proc-info -- -m | [-p PORTMASK] [--stats | --xstats[=hide_zero] |
    --stats-reset | --xstats-reset] [ --show-port | --show-tm | --show-crypto |
    --show-ring[=name] | --show-mempool[=name] | --iter-mempool=name |
    --show-port-private | --version | --firmware-version | --show-rss-reta |
@@ -34,9 +34,10 @@ Parameters
 The stats parameter controls the printing of generic port statistics. If no
 port mask is specified stats are printed for all DPDK ports.
 
-**--xstats**
+**--xstats[=hide_zero]**
 The xstats parameter controls the printing of extended port statistics. If no
-port mask is specified xstats are printed for all DPDK ports.
+port mask is specified xstats are printed for all DPDK ports. Specifying the
+hide_zero value to display xstats with hide zero.
 
 **--stats-reset**
 The stats-reset parameter controls the resetting of generic port statistics. If
-- 
2.33.0