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Diffstat (limited to 'src/vppinfra/test_bihash_template.c')
-rw-r--r--src/vppinfra/test_bihash_template.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/src/vppinfra/test_bihash_template.c b/src/vppinfra/test_bihash_template.c
index c1a44691966..86039d8408a 100644
--- a/src/vppinfra/test_bihash_template.c
+++ b/src/vppinfra/test_bihash_template.c
@@ -337,6 +337,16 @@ test_bihash (test_main_t * tm)
{
for (i = 0; i < tm->nitems; i++)
{
+ /* Prefetch buckets 8 iterations ahead */
+ if (1 && (i < (tm->nitems - 8)))
+ {
+ BVT (clib_bihash_kv) pref_kv;
+ u64 pref_hash;
+ pref_kv.key = tm->keys[i + 8];
+ pref_hash = BV (clib_bihash_hash) (&pref_kv);
+ BV (clib_bihash_prefetch_bucket) (h, pref_hash);
+ }
+
kv.key = tm->keys[i];
if (BV (clib_bihash_search) (h, &kv, &kv) < 0)
if (BV (clib_bihash_search) (h, &kv, &kv) < 0)
@@ -356,8 +366,10 @@ test_bihash (test_main_t * tm)
total_searches = (uword) tm->search_iter * (uword) tm->nitems;
if (delta > 0)
- fformat (stdout, "%.f searches per second\n",
- ((f64) total_searches) / delta);
+ fformat (stdout,
+ "%.f searches per second, %.2f nsec per search\n",
+ ((f64) total_searches) / delta,
+ 1e9 * (delta / ((f64) total_searches)));
fformat (stdout, "%lld searches in %.6f seconds\n", total_searches,
delta);
@@ -409,6 +421,16 @@ test_bihash (test_main_t * tm)
{
for (j = 0; j < tm->nitems; j++)
{
+ /* Prefetch buckets 8 iterations ahead */
+ if (1 && (j < (tm->nitems - 8)))
+ {
+ BVT (clib_bihash_kv) pref_kv;
+ u64 pref_hash;
+ pref_kv.key = tm->keys[j + 8];
+ pref_hash = BV (clib_bihash_hash) (&pref_kv);
+ BV (clib_bihash_prefetch_bucket) (h, pref_hash);
+ }
+
kv.key = tm->keys[j];
rv = BV (clib_bihash_search) (h, &kv, &kv);
if (j <= i && rv >= 0)