[dpdk-dev] [PATCH v1 2/3] test/hash: change multiwriter test to use jhash

[Yipeng Wang]

With sequential key, the test will cover more corner
cases with jhash instead of crc hash, since jhash
generates more random hash pattern on sequential key.
It is useful for functional verification.

Signed-off-by: Yipeng Wang <yipeng1.w...@intel.com>
---
 test/test/test_hash_multiwriter.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/test/test/test_hash_multiwriter.c 
b/test/test/test_hash_multiwriter.c
index 6a3eb10..7f2deae 100644
--- a/test/test/test_hash_multiwriter.c
+++ b/test/test/test_hash_multiwriter.c
@@ -12,6 +12,7 @@
 #include <rte_malloc.h>
 #include <rte_random.h>
 #include <rte_spinlock.h>
+#include <rte_jhash.h>
 
 #include "test.h"
 
@@ -95,7 +96,7 @@ test_hash_multiwriter_worker(void *arg)
 
 
 static int
-test_hash_multiwriter(void)
+test_hash_multiwriter(int use_jhash)
 {
        unsigned int i, rounded_nb_total_tsx_insertion;
        static unsigned calledCount = 1;
@@ -108,10 +109,14 @@ test_hash_multiwriter(void)
        struct rte_hash_parameters hash_params = {
                .entries = nb_entries,
                .key_len = sizeof(uint32_t),
-               .hash_func = rte_hash_crc,
                .hash_func_init_val = 0,
                .socket_id = rte_socket_id(),
        };
+       if (use_jhash)
+               hash_params.hash_func = rte_jhash;
+       else
+               hash_params.hash_func = rte_hash_crc;
+
        if (use_htm)
                hash_params.extra_flag =
                        RTE_HASH_EXTRA_FLAGS_TRANS_MEM_SUPPORT
@@ -259,6 +264,8 @@ test_hash_multiwriter(void)
 static int
 test_hash_multiwriter_main(void)
 {
+       int use_jhash = 1;
+
        if (rte_lcore_count() == 1) {
                printf("More than one lcore is required to do multiwriter 
test\n");
                return 0;
@@ -278,13 +285,13 @@ test_hash_multiwriter_main(void)
                printf("Test multi-writer with Hardware transactional 
memory\n");
 
                use_htm = 1;
-               if (test_hash_multiwriter() < 0)
+               if (test_hash_multiwriter(use_jhash) < 0)
                        return -1;
        }
 
        printf("Test multi-writer without Hardware transactional memory\n");
        use_htm = 0;
-       if (test_hash_multiwriter() < 0)
+       if (test_hash_multiwriter(use_jhash) < 0)
                return -1;
 
        return 0;
-- 
2.7.4