Support arcdiff.

Summary:
Task ID: #

Blame Rev:

Test Plan: Revert Plan:

Differential Revision: https://reviews.facebook.net/D3105

.arcconfig

@@ -0,0 +1,6 @@
+{
+  "project_id" : "leveldb",
+  "conduit_uri" : "https://reviews.facebook.net/",
+  "copyright_holder" : ""
+}
+

db/db_bench.cc

@@ -85,7 +85,7 @@ static int FLAGS_write_buffer_size = 0;
 
 // Number of bytes to use as a cache of uncompressed data.
 // Negative means use default settings.
-static int FLAGS_cache_size = -1;
+static long FLAGS_cache_size = -1;
 
 // Maximum number of files to keep open at the same time (use default if == 0)
 static int FLAGS_open_files = 0;
@@ -252,10 +252,12 @@ class Stats {
       extra = rate;
     }
     AppendWithSpace(&extra, message_);
+    double throughput = (double)done_/seconds_;
 
-    fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n",
+    fprintf(stdout, "%-12s : %11.3f micros/op %ld ops/sec;%s%s\n",
             name.ToString().c_str(),
             seconds_ * 1e6 / done_,
+            (long)throughput,
             (extra.empty() ? "" : " "),
             extra.c_str());
     if (FLAGS_histogram) {
@@ -950,7 +952,7 @@ int main(int argc, char** argv) {
       FLAGS_value_size = n;
     } else if (sscanf(argv[i], "--write_buffer_size=%d%c", &n, &junk) == 1) {
       FLAGS_write_buffer_size = n;
-    } else if (sscanf(argv[i], "--cache_size=%d%c", &n, &junk) == 1) {
+    } else if (sscanf(argv[i], "--cache_size=%ld%c", &n, &junk) == 1) {
       FLAGS_cache_size = n;
     } else if (sscanf(argv[i], "--bloom_bits=%d%c", &n, &junk) == 1) {
       FLAGS_bloom_bits = n;