a17c2b694c
This function is responsible for majority of CPU time in prefetto. Reduce the number of memory reads (don't read strings byte-by-byte). Update all calls of ReadString to include the third parameter to have a max read. Add an Elf creation benchmark since this function is on the elf creation path. Test: libunwindstack_unit_test Change-Id: Ia36e1f1a5ba76c9e9f13c43fb9e3691dde7897f2
62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <err.h>
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#include <stdint.h>
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#include <string>
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#include <vector>
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#include <android-base/file.h>
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#include <android-base/strings.h>
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#include <benchmark/benchmark.h>
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#include <unwindstack/Elf.h>
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#include <unwindstack/Memory.h>
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std::string GetElfFile() {
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return android::base::GetExecutableDirectory() + "/benchmarks/files/libart_arm.so";
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}
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std::string GetSymbolSortedElfFile() {
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return android::base::GetExecutableDirectory() + "/benchmarks/files/boot_arm.oat";
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}
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std::string GetCompressedElfFile() {
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// Both are the same right now.
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return GetSymbolSortedElfFile();
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}
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#if defined(__BIONIC__)
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#include <meminfo/procmeminfo.h>
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#include <procinfo/process_map.h>
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void GatherRss(uint64_t* rss_bytes) {
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android::meminfo::ProcMemInfo proc_mem(getpid());
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const std::vector<android::meminfo::Vma>& maps = proc_mem.MapsWithoutUsageStats();
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for (auto& vma : maps) {
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if (vma.name == "[anon:libc_malloc]" || android::base::StartsWith(vma.name, "[anon:scudo:") ||
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android::base::StartsWith(vma.name, "[anon:GWP-ASan")) {
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android::meminfo::Vma update_vma(vma);
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if (!proc_mem.FillInVmaStats(update_vma)) {
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err(1, "FillInVmaStats failed\n");
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}
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*rss_bytes += update_vma.usage.rss;
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}
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}
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}
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#endif
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