[PATCH] app/test-regex: fix incorrect number of matches

[Gerry Gribbon <ggribbon@nvidia.com>]

Depending on number of jobs specified on command line, part of the
data buffer may not get searched, resulting in incorrect number of
matches being reported.

Additional change to ensure the "All Matches" summary outputs the
correct match start locations in the supplied data buffer.

Fixes: de06137cb295 ("app/regex: add RegEx test application")
Cc: yuvalav@mellanox.com
Cc: stable@dpdk.org

Signed-off-by: Gerry Gribbon <ggribbon@nvidia.com>
Acked-by: Ori Kam <orika@nvidia.com>
---
 app/test-regex/main.c | 38 ++++++++++++++++++++++++++++----------
 1 file changed, 28 insertions(+), 10 deletions(-)

diff --git a/app/test-regex/main.c b/app/test-regex/main.c
index ab8a3e56e7..7c014b2210 100644
--- a/app/test-regex/main.c
+++ b/app/test-regex/main.c
@@ -382,10 +382,13 @@ run_regex(void *args)
 	char *data_buf = rgxc->data_buf;
 	long data_len = rgxc->data_len;
 	long job_len = rgxc->job_len;
-
+	long remainder;
+	long act_job_len = 0;
+	bool last_job = false;
 	char *buf = NULL;
 	uint32_t actual_jobs = 0;
 	uint32_t i;
+	uint32_t job_id;
 	uint16_t qp_id;
 	uint16_t dev_id = 0;
 	uint8_t nb_matches;
@@ -456,9 +459,16 @@ run_regex(void *args)
 		/* Assign each mbuf with the data to handle. */
 		actual_jobs = 0;
 		pos = 0;
+		remainder = data_len % nb_jobs;
+
 		/* Allocate the jobs and assign each job with an mbuf. */
 		for (i = 0; (pos < data_len) && (i < nb_jobs) ; i++) {
-			long act_job_len = RTE_MIN(job_len, data_len - pos);
+			act_job_len = RTE_MIN(job_len, data_len - pos);
+
+			if (i == (nb_jobs - 1)) {
+				last_job = true;
+				act_job_len += remainder;
+			}
 
 			ops[i] = rte_malloc(NULL, sizeof(*ops[0]) +
 					nb_max_matches *
@@ -478,7 +488,12 @@ run_regex(void *args)
 				if (ops[i]->mbuf) {
 					rte_pktmbuf_attach_extbuf(ops[i]->mbuf,
 					&buf[pos], 0, act_job_len, &shinfo);
-					ops[i]->mbuf->data_len = job_len;
+
+					if (!last_job)
+						ops[i]->mbuf->data_len = job_len;
+					else
+						ops[i]->mbuf->data_len = act_job_len;
+
 					ops[i]->mbuf->pkt_len = act_job_len;
 				}
 			}
@@ -506,6 +521,9 @@ run_regex(void *args)
 			qp = &qps[qp_id];
 			qp->total_enqueue = 0;
 			qp->total_dequeue = 0;
+			/* Re-set user id after dequeue to match data in mbuf. */
+			for (job_id = 0 ; job_id < nb_jobs; job_id++)
+				qp->ops[job_id]->user_id = job_id;
 		}
 		do {
 			update = false;
@@ -551,10 +569,10 @@ run_regex(void *args)
 	for (qp_id = 0; qp_id < nb_qps; qp_id++) {
 		qp = &qps[qp_id];
 		time = (long double)qp->cycles / rte_get_timer_hz();
-		printf("Core=%u QP=%u Job=%ld Bytes Time=%Lf sec Perf=%Lf "
+		printf("Core=%u QP=%u Job=%ld Bytes Last Job=%ld Bytes Time=%Lf sec Perf=%Lf "
 		       "Gbps\n", rte_lcore_id(), qp_id + qp_id_base,
-		       job_len, time,
-		       (((double)actual_jobs * job_len * nb_iterations * 8)
+		       job_len, act_job_len, time,
+		       (((double)data_len * nb_iterations * 8)
 		       / time) / 1000000000.0);
 	}
 
@@ -587,10 +605,10 @@ run_regex(void *args)
 			qp->total_matches += nb_matches;
 			match = qp->ops[d_ind % actual_jobs]->matches;
 			for (i = 0; i < nb_matches; i++) {
-				printf("start = %ld, len = %d, rule = %d\n",
-						match->start_offset +
-						d_ind * job_len,
-						match->len, match->rule_id);
+				printf("start = %d, len = %d, rule = %d\n",
+					match->start_offset +
+					(int)(qp->ops[d_ind % actual_jobs]->user_id * job_len),
+					match->len, match->rule_id);
 				match++;
 			}
 		}
-- 
2.25.1