content: [Android] divide the mapped_memory_reclaim_limit for Android low-end devices by 2 since we'll be using 16bpp textures instead of 32bpp
BUG=
Review URL: https://chromiumcodereview.appspot.com/24248004
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224338 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 81654000..fd9721d 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -2552,18 +2552,19 @@
// know our upload throughput yet, this just caps our memory usage.
size_t divider = 1;
if (base::android::SysUtils::IsLowEndDevice())
- divider = 3;
-
+ divider = 6;
// For reference Nexus10 can upload 1MB in about 2.5ms.
- const size_t max_bytes_uploaded_per_ms = (2 * 1024 * 1024) / (5 * divider);
+ const double max_mb_uploaded_per_ms = 2.0 / (5 * divider);
// Deadline to draw a frame to achieve 60 frames per second.
const size_t kMillisecondsPerFrame = 16;
// Assuming a two frame deep pipeline between the CPU and the GPU.
- const size_t max_transfer_buffer_usage_bytes =
- 2 * kMillisecondsPerFrame * max_bytes_uploaded_per_ms;
+ size_t max_transfer_buffer_usage_mb =
+ static_cast<size_t>(2 * kMillisecondsPerFrame * max_mb_uploaded_per_ms);
+ static const size_t kBytesPerMegabyte = 1024 * 1024;
// We keep the MappedMemoryReclaimLimit the same as the upload limit
// to avoid unnecessarily stalling the compositor thread.
- const size_t mapped_memory_reclaim_limit = max_transfer_buffer_usage_bytes;
+ const size_t mapped_memory_reclaim_limit =
+ max_transfer_buffer_usage_mb * kBytesPerMegabyte;
#else
const size_t mapped_memory_reclaim_limit =
WebGraphicsContext3DCommandBufferImpl::kNoLimit;
