[dpdk-dev] [PATCH v2 3/6] app/regex: read data file once at startup

[Ophir Munk <ophirmu@nvidia.com>]

Up to this commit the input data file was read from scratch for each QP,
which is redundant. Starting from this commit the data file is read only
once at startup. Each QP will clone the data.

Signed-off-by: Ophir Munk <ophirmu@nvidia.com>
---
 app/test-regex/main.c | 63 +++++++++++++++++++++++++++++++--------------------
 1 file changed, 39 insertions(+), 24 deletions(-)

diff --git a/app/test-regex/main.c b/app/test-regex/main.c
index d225267..9bafd02 100644
--- a/app/test-regex/main.c
+++ b/app/test-regex/main.c
@@ -180,6 +180,19 @@ read_file(char *file, char **buf)
 }
 
 static int
+clone_buf(char *data_buf, char **buf, long data_len)
+{
+	char *dest_buf;
+	dest_buf =
+		rte_malloc(NULL, sizeof(char) * (data_len + 1), 4096);
+	if (!dest_buf)
+		return -ENOMEM;
+	memcpy(dest_buf, data_buf, data_len + 1);
+	*buf = dest_buf;
+	return 0;
+}
+
+static int
 init_port(uint16_t *nb_max_payload, char *rules_file, uint8_t *nb_max_matches,
 	  uint32_t nb_qps)
 {
@@ -262,12 +275,11 @@ extbuf_free_cb(void *addr __rte_unused, void *fcb_opaque __rte_unused)
 
 static int
 run_regex(uint32_t nb_jobs,
-	  uint16_t nb_max_payload, bool perf_mode, uint32_t nb_iterations,
-	  char *data_file, uint8_t nb_max_matches, uint32_t nb_qps)
+	  bool perf_mode, uint32_t nb_iterations,
+	  uint8_t nb_max_matches, uint32_t nb_qps,
+	  char *data_buf, long data_len, long job_len)
 {
 	char *buf = NULL;
-	long buf_len = 0;
-	long job_len = 0;
 	uint32_t actual_jobs = 0;
 	uint32_t i;
 	uint16_t qp_id;
@@ -344,22 +356,8 @@ run_regex(uint32_t nb_jobs,
 			}
 		}
 
-		buf_len = read_file(data_file, &buf);
-		if (buf_len <= 0) {
-			printf("Error, can't read file, or file is empty.\n");
-			res = -EXIT_FAILURE;
-			goto end;
-		}
-
-		job_len = buf_len / nb_jobs;
-		if (job_len == 0) {
-			printf("Error, To many jobs, for the given input.\n");
-			res = -EXIT_FAILURE;
-			goto end;
-		}
-
-		if (job_len > nb_max_payload) {
-			printf("Error, not enough jobs to cover input.\n");
+		if (clone_buf(data_buf, &buf, data_len)) {
+			printf("Error, can't clone buf.\n");
 			res = -EXIT_FAILURE;
 			goto end;
 		}
@@ -367,8 +365,8 @@ run_regex(uint32_t nb_jobs,
 		/* Assign each mbuf with the data to handle. */
 		actual_jobs = 0;
 		pos = 0;
-		for (i = 0; (pos < buf_len) && (i < nb_jobs) ; i++) {
-			long act_job_len = RTE_MIN(job_len, buf_len - pos);
+		for (i = 0; (pos < data_len) && (i < nb_jobs) ; i++) {
+			long act_job_len = RTE_MIN(job_len, data_len - pos);
 			rte_pktmbuf_attach_extbuf(ops[i]->mbuf, &buf[pos], 0,
 					act_job_len, &shinfo);
 			jobs_ctx[i].mbuf = ops[i]->mbuf;
@@ -505,6 +503,9 @@ main(int argc, char **argv)
 	uint16_t nb_max_payload = 0;
 	uint8_t nb_max_matches = 0;
 	uint32_t nb_qps = 1;
+	char *data_buf;
+	long data_len;
+	long job_len;
 
 	/* Init EAL. */
 	ret = rte_eal_init(argc, argv);
@@ -522,10 +523,24 @@ main(int argc, char **argv)
 			&nb_max_matches, nb_qps);
 	if (ret < 0)
 		rte_exit(EXIT_FAILURE, "init port failed\n");
-	ret = run_regex(nb_jobs, nb_max_payload, perf_mode,
-			nb_iterations, data_file, nb_max_matches, nb_qps);
+
+	data_len = read_file(data_file, &data_buf);
+	if (data_len <= 0)
+		rte_exit(EXIT_FAILURE, "Error, can't read file, or file is empty.\n");
+
+	job_len = data_len / nb_jobs;
+	if (job_len == 0)
+		rte_exit(EXIT_FAILURE, "Error, To many jobs, for the given input.\n");
+
+	if (job_len > nb_max_payload)
+		rte_exit(EXIT_FAILURE, "Error, not enough jobs to cover input.\n");
+
+	ret = run_regex(nb_jobs, perf_mode,
+			nb_iterations, nb_max_matches, nb_qps,
+			data_buf, data_len, job_len);
 	if (ret < 0) {
 		rte_exit(EXIT_FAILURE, "RegEx function failed\n");
 	}
+	rte_free(data_buf);
 	return EXIT_SUCCESS;
 }
-- 
2.8.4