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/*
* Copyright 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <bpf/BpfMap.h>
#include <utils/String16.h>
#include <utils/Vector.h>
#include <functional>
namespace android {
class GpuMem {
public:
GpuMem() = default;
~GpuMem();
// initialize eBPF program and map
void initialize();
// dumpsys interface
void dump(const Vector<String16>& args, std::string* result);
bool isInitialized() { return mInitialized.load(); }
// Traverse the gpu memory total map to feed the callback function.
void traverseGpuMemTotals(const std::function<void(int64_t ts, uint32_t gpuId, uint32_t pid,
uint64_t size)>& callback);
private:
// Friend class for testing.
friend class TestableGpuMem;
// set gpu memory total map
void setGpuMemTotalMap(bpf::BpfMapRO<uint64_t, uint64_t>& map);
// indicate whether ebpf has been initialized
std::atomic<bool> mInitialized = false;
// bpf map for GPU memory total data
android::bpf::BpfMapRO<uint64_t, uint64_t> mGpuMemTotalMap;
// gpu memory tracepoint event category
static constexpr char kGpuMemTraceGroup[] = "gpu_mem";
// gpu memory total tracepoint
static constexpr char kGpuMemTotalTracepoint[] = "gpu_mem_total";
// pinned gpu memory total bpf c program path in bpf sysfs
static constexpr char kGpuMemTotalProgPath[] =
"/sys/fs/bpf/prog_gpuMem_tracepoint_gpu_mem_gpu_mem_total";
// pinned gpu memory total bpf map path in bpf sysfs
static constexpr char kGpuMemTotalMapPath[] = "/sys/fs/bpf/map_gpuMem_gpu_mem_total_map";
// 30 seconds timeout for trying to attach bpf program to tracepoint
static constexpr int kGpuWaitTimeout = 30;
};
} // namespace android
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