Optimize pattern filling by limiting small calls to memcpy

[fio.git] / options.c

diff --git a/options.c b/options.c
index f62ab6d573cd3369cbeced32edec4a4fe4c666d4..8fb93ca7a0c2c6a331a75e5250c86f0d9e37e156 100644 (file)
--- a/options.c
+++ b/options.c
@@ -689,12 +689,24 @@ static int str_verify_pattern_cb(void *data, const char *input)
                        }
                }
        }
+
+       /*
+        * Fill the pattern all the way to the end. This greatly reduces
+        * the number of memcpy's we have to do when verifying the IO.
+        */
+       while (i > 1 && i * 2 <= MAX_PATTERN_SIZE) {
+               memcpy(&td->o.verify_pattern[i], &td->o.verify_pattern[0], i);
+               i *= 2;
+       }
+
        td->o.verify_pattern_bytes = i;
+
        /*
         * VERIFY_META could already be set
         */
        if (td->o.verify == VERIFY_NONE)
                td->o.verify = VERIFY_PATTERN;
+
        return 0;
 }