commit 0d4d291ce9fbc249757cd693044d4d35c86b3b74
author Mathieu Chartier <mathieuc@google.com> Fri Feb 10 17:22:41 2017 -0800
committer Mathieu Chartier <mathieuc@google.com> Sat Feb 11 02:25:22 2017 +0000
tree 394fe585194ff1871513758b00f3c5c33d11fda8
parent 806ac631e53f12061cb0ae7640aa9cd0dd79243d

Add extra logging for image decompression speed

Sample output:
I zygote  : Decompressing image took 3.173ms (678MB/s)

Test: Phone boot with -verbose:image

Bug: 34927277
Change-Id: If0689594bca52d5b98d32d10adfe64f6d2402020

runtime/gc/space/image_space.cc

diff --git a/runtime/gc/space/image_space.cc b/runtime/gc/space/image_space.cc
index ffbca52..c0aa668 100644
--- a/runtime/gc/space/image_space.cc
+++ b/runtime/gc/space/image_space.cc
@@ -802,7 +802,11 @@
           reinterpret_cast<char*>(map->Begin()) + decompress_offset,
           stored_size,
           map->Size() - decompress_offset);
-      VLOG(image) << "Decompressing image took " << PrettyDuration(NanoTime() - start);
+      const uint64_t time = NanoTime() - start;
+      // Add one 1 ns to prevent possible divide by 0.
+      VLOG(image) << "Decompressing image took " << PrettyDuration(time) << " ("
+                  << PrettySize(static_cast<uint64_t>(map->Size()) * MsToNs(1000) / (time + 1))
+                  << "/s)";
       if (decompressed_size + sizeof(ImageHeader) != image_header.GetImageSize()) {
         *error_msg = StringPrintf(
             "Decompressed size does not match expected image size %zu vs %zu",