[2/2] app/crypto-perf: test queue pair priority

diff --git a/app/test-crypto-perf/cperf_options.h b/app/test-crypto-perf/cperf_options.h
index 131ecfdffb..48f409c3ba 100644
--- a/app/test-crypto-perf/cperf_options.h
+++ b/app/test-crypto-perf/cperf_options.h
@@ -32,6 +32,8 @@ 
 #define CPERF_TEST_FILE		("test-file")
 #define CPERF_TEST_NAME		("test-name")
 
+#define CPERF_LOW_PRIO_QP_MASK	("low-prio-qp-mask")
+
 #define CPERF_CIPHER_ALGO	("cipher-algo")
 #define CPERF_CIPHER_OP		("cipher-op")
 #define CPERF_CIPHER_KEY_SZ	("cipher-key-sz")
@@ -107,6 +109,7 @@  struct cperf_options {
 	uint32_t *imix_buffer_sizes;
 	uint32_t nb_descriptors;
 	uint16_t nb_qps;
+	uint64_t low_prio_qp_mask;
 
 	uint32_t sessionless:1;
 	uint32_t shared_session:1;
diff --git a/app/test-crypto-perf/cperf_options_parsing.c b/app/test-crypto-perf/cperf_options_parsing.c
index c91fcf0479..8c15cd813f 100644
--- a/app/test-crypto-perf/cperf_options_parsing.c
+++ b/app/test-crypto-perf/cperf_options_parsing.c
@@ -37,6 +37,7 @@  usage(char *progname)
 		" --segment-sz N: set the size of the segment to use\n"
 		" --desc-nb N: set number of descriptors for each crypto device\n"
 		" --devtype TYPE: set crypto device type to use\n"
+		" --low-prio-qp-mask mask: set low priority for queues set in mask(hex)\n"
 		" --optype cipher-only / auth-only / cipher-then-auth / auth-then-cipher /\n"
 		"        aead / pdcp / docsis / ipsec / modex / secp256r1 / sm2 / tls-record : set operation type\n"
 		" --sessionless: enable session-less crypto operations\n"
@@ -941,6 +942,22 @@  parse_pmd_cyclecount_delay_ms(struct cperf_options *opts,
 	return 0;
 }
 
+static int
+parse_low_prio_qp_mask(struct cperf_options *opts, const char *arg)
+{
+	char *end = NULL;
+	unsigned long n;
+
+	/* parse hexadecimal string */
+	n = strtoul(arg, &end, 16);
+	if ((optarg[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+
+	opts->low_prio_qp_mask = n;
+
+	return 0;
+}
+
 typedef int (*option_parser_t)(struct cperf_options *opts,
 		const char *arg);
 
@@ -962,6 +979,8 @@  static struct option lgopts[] = {
 	{ CPERF_SEGMENT_SIZE, required_argument, 0, 0 },
 	{ CPERF_DESC_NB, required_argument, 0, 0 },
 
+	{ CPERF_LOW_PRIO_QP_MASK, required_argument, 0, 0 },
+
 	{ CPERF_IMIX, required_argument, 0, 0 },
 	{ CPERF_DEVTYPE, required_argument, 0, 0 },
 	{ CPERF_OPTYPE, required_argument, 0, 0 },
@@ -1097,6 +1116,7 @@  cperf_opts_parse_long(int opt_idx, struct cperf_options *opts)
 		{ CPERF_BUFFER_SIZE,	parse_buffer_sz },
 		{ CPERF_SEGMENT_SIZE,	parse_segment_sz },
 		{ CPERF_DESC_NB,	parse_desc_nb },
+		{ CPERF_LOW_PRIO_QP_MASK,	parse_low_prio_qp_mask },
 		{ CPERF_DEVTYPE,	parse_device_type },
 		{ CPERF_OPTYPE,		parse_op_type },
 		{ CPERF_SESSIONLESS,	parse_sessionless },
diff --git a/app/test-crypto-perf/main.c b/app/test-crypto-perf/main.c
index 75810dbf0b..eac87091a1 100644
--- a/app/test-crypto-perf/main.c
+++ b/app/test-crypto-perf/main.c
@@ -249,7 +249,8 @@  cperf_initialize_cryptodev(struct cperf_options *opts, uint8_t *enabled_cdevs)
 		}
 
 		struct rte_cryptodev_qp_conf qp_conf = {
-			.nb_descriptors = opts->nb_descriptors
+			.nb_descriptors = opts->nb_descriptors,
+			.priority = RTE_CRYPTODEV_QP_PRIORITY_HIGHEST
 		};
 
 		/**
@@ -315,6 +316,9 @@  cperf_initialize_cryptodev(struct cperf_options *opts, uint8_t *enabled_cdevs)
 		}
 
 		for (j = 0; j < opts->nb_qps; j++) {
+			if ((1 << j) & opts->low_prio_qp_mask)
+				qp_conf.priority = RTE_CRYPTODEV_QP_PRIORITY_LOWEST;
+
 			ret = rte_cryptodev_queue_pair_setup(cdev_id, j,
 				&qp_conf, socket_id);
 			if (ret < 0) {
diff --git a/doc/guides/tools/cryptoperf.rst b/doc/guides/tools/cryptoperf.rst
index 0510a3bb89..3a16b3a4a6 100644
--- a/doc/guides/tools/cryptoperf.rst
+++ b/doc/guides/tools/cryptoperf.rst
@@ -361,6 +361,11 @@  The following are the application command-line options:
 
         Set TLS/DTLS protocol version for perf test (default is TLS1.2).
 
+* ``--low-prio-qp-mask <mask>``
+
+        Set low priority for queue pairs set in the hexadecimal mask.
+        This is an optional parameter, if not set all queue pairs will be on same high priority.
+
 Test Vector File
 ~~~~~~~~~~~~~~~~