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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GPU_COMMAND_BUFFER_CLIENT_SHARED_MEMORY_LIMITS_H_
#define GPU_COMMAND_BUFFER_CLIENT_SHARED_MEMORY_LIMITS_H_
#include <stddef.h>
#include "base/sys_info.h"
#include "build/build_config.h"
namespace gpu {
struct SharedMemoryLimits {
SharedMemoryLimits() {
// We can't call AmountOfPhysicalMemory under NACL, so leave the default.
#if !defined(OS_NACL)
// Max mapped memory to use for a texture upload depends on device ram.
// Do not use more than 5% of extra shared memory, and do not use any extra
// for memory contrained devices (<=1GB).
max_mapped_memory_for_texture_upload =
base::SysInfo::AmountOfPhysicalMemory() > 1024 * 1024 * 1024
? base::saturated_cast<uint32_t>(
base::SysInfo::AmountOfPhysicalMemory() / 20)
: 0;
// On memory constrained devices, switch to lower limits.
if (base::SysInfo::AmountOfPhysicalMemoryMB() <= 512) {
command_buffer_size = 512 * 1024;
start_transfer_buffer_size = 32 * 1024;
min_transfer_buffer_size = 32 * 1024;
mapped_memory_chunk_size = 256 * 1024;
}
#endif
}
int32_t command_buffer_size = 1024 * 1024;
uint32_t start_transfer_buffer_size = 64 * 1024;
uint32_t min_transfer_buffer_size = 64 * 1024;
uint32_t max_transfer_buffer_size = 16 * 1024 * 1024;
static constexpr uint32_t kNoLimit = 0;
uint32_t mapped_memory_reclaim_limit = kNoLimit;
uint32_t mapped_memory_chunk_size = 2 * 1024 * 1024;
uint32_t max_mapped_memory_for_texture_upload = 0;
// These are limits for contexts only used for creating textures, mailboxing
// them and dealing with synchronization.
static SharedMemoryLimits ForMailboxContext() {
SharedMemoryLimits limits;
limits.command_buffer_size = 64 * 1024;
limits.start_transfer_buffer_size = 64 * 1024;
limits.min_transfer_buffer_size = 64 * 1024;
return limits;
}
static SharedMemoryLimits ForOOPRasterContext() {
SharedMemoryLimits limits;
limits.command_buffer_size = 64 * 1024;
// TODO(khushalsagar): See if transfer buffer sizes can be fine-tuned
// further. A 16M max_transfer_buffer_size doesn't make sense if only paint
// commands are being sent through this buffer, and all large transfers use
// the transfer cache backed by mapped memory.
return limits;
}
};
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_CLIENT_SHARED_MEMORY_LIMITS_H_
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