From: Stella Lau <laus@fb.com>
Date: Fri, 14 Jul 2017 18:00:20 +0000 (-0700)
Subject: Add percentages to offset histogram
X-Git-Tag: v1.3.1^2~12^2~7^2~29
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=55f960e8db9e3df9322ae9c973c699f671f51c90;p=thirdparty%2Fzstd.git

Add percentages to offset histogram
---

diff --git a/contrib/long_distance_matching/ldm.c b/contrib/long_distance_matching/ldm.c
index 186fa08eb..d935a2bdf 100644
--- a/contrib/long_distance_matching/ldm.c
+++ b/contrib/long_distance_matching/ldm.c
@@ -135,7 +135,10 @@ void LDM_printCompressStats(const LDM_compressStats *stats) {
   printf("\n");
   printf("offset histogram\n");
   for (; i <= intLog2(stats->maxOffset); i++) {
-    printf("2^%*d: %10u\n", 2, i, stats->offsetHistogram[i]);
+    printf("2^%*d: %10u    %6.3f%%\n", 2, i,
+           stats->offsetHistogram[i],
+           100.0 * (double) stats->offsetHistogram[i] /
+                   (double)stats->numMatches);
   }
   printf("\n");
 
diff --git a/contrib/long_distance_matching/ldm.h b/contrib/long_distance_matching/ldm.h
index 0e54faa70..3c8c04ecc 100644
--- a/contrib/long_distance_matching/ldm.h
+++ b/contrib/long_distance_matching/ldm.h
@@ -19,8 +19,8 @@
 #define WINDOW_SIZE (1 << 25)
 
 //These should be multiples of four.
-#define LDM_MIN_MATCH_LENGTH 4
-#define LDM_HASH_LENGTH 4
+#define LDM_MIN_MATCH_LENGTH 1024
+#define LDM_HASH_LENGTH 1024
 
 typedef U32 offset_t;
 typedef U32 hash_t;