Sandeep Patil | a60a776 | 2018-08-29 17:10:47 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <meminfo/sysmeminfo.h> |
| 18 | |
| 19 | #include <fcntl.h> |
Sandeep Patil | 9f4028d | 2018-11-09 19:18:29 -0800 | [diff] [blame] | 20 | #include <inttypes.h> |
| 21 | #include <stdio.h> |
Sandeep Patil | a60a776 | 2018-08-29 17:10:47 -0700 | [diff] [blame] | 22 | #include <sys/stat.h> |
| 23 | #include <sys/types.h> |
| 24 | |
| 25 | #include <string> |
| 26 | |
| 27 | #include <android-base/file.h> |
| 28 | #include <android-base/logging.h> |
Sandeep Patil | 76a34f0 | 2018-12-29 14:34:20 -0800 | [diff] [blame^] | 29 | #include <android-base/stringprintf.h> |
| 30 | #include <android-base/unique_fd.h> |
Sandeep Patil | a60a776 | 2018-08-29 17:10:47 -0700 | [diff] [blame] | 31 | |
| 32 | #include <benchmark/benchmark.h> |
| 33 | |
Sandeep Patil | e473d7e | 2018-12-11 09:28:38 -0800 | [diff] [blame] | 34 | using ::android::meminfo::SysMemInfo; |
| 35 | |
Sandeep Patil | a60a776 | 2018-08-29 17:10:47 -0700 | [diff] [blame] | 36 | enum { |
| 37 | MEMINFO_TOTAL, |
| 38 | MEMINFO_FREE, |
| 39 | MEMINFO_BUFFERS, |
| 40 | MEMINFO_CACHED, |
| 41 | MEMINFO_SHMEM, |
| 42 | MEMINFO_SLAB, |
| 43 | MEMINFO_SLAB_RECLAIMABLE, |
| 44 | MEMINFO_SLAB_UNRECLAIMABLE, |
| 45 | MEMINFO_SWAP_TOTAL, |
| 46 | MEMINFO_SWAP_FREE, |
| 47 | MEMINFO_ZRAM_TOTAL, |
| 48 | MEMINFO_MAPPED, |
| 49 | MEMINFO_VMALLOC_USED, |
| 50 | MEMINFO_PAGE_TABLES, |
| 51 | MEMINFO_KERNEL_STACK, |
| 52 | MEMINFO_COUNT |
| 53 | }; |
| 54 | |
Sandeep Patil | 9f4028d | 2018-11-09 19:18:29 -0800 | [diff] [blame] | 55 | static void get_mem_info(uint64_t mem[], const char* file) { |
Sandeep Patil | a60a776 | 2018-08-29 17:10:47 -0700 | [diff] [blame] | 56 | char buffer[4096]; |
| 57 | unsigned int numFound = 0; |
| 58 | |
| 59 | int fd = open(file, O_RDONLY); |
| 60 | |
| 61 | if (fd < 0) { |
| 62 | printf("Unable to open %s: %s\n", file, strerror(errno)); |
| 63 | return; |
| 64 | } |
| 65 | |
| 66 | const int len = read(fd, buffer, sizeof(buffer) - 1); |
| 67 | close(fd); |
| 68 | |
| 69 | if (len < 0) { |
| 70 | printf("Empty %s\n", file); |
| 71 | return; |
| 72 | } |
| 73 | buffer[len] = 0; |
| 74 | |
| 75 | static const char* const tags[] = { |
Sandeep Patil | 9f4028d | 2018-11-09 19:18:29 -0800 | [diff] [blame] | 76 | "MemTotal:", "MemFree:", "Buffers:", "Cached:", "Shmem:", "Slab:", |
| 77 | "SReclaimable:", "SUnreclaim:", "SwapTotal:", "SwapFree:", "ZRam:", "Mapped:", |
Sandeep Patil | e473d7e | 2018-12-11 09:28:38 -0800 | [diff] [blame] | 78 | "VmallocUsed:", "PageTables:", "KernelStack:", NULL}; |
Sandeep Patil | a60a776 | 2018-08-29 17:10:47 -0700 | [diff] [blame] | 79 | |
| 80 | static const int tagsLen[] = {9, 8, 8, 7, 6, 5, 13, 11, 10, 9, 5, 7, 12, 11, 12, 0}; |
| 81 | |
| 82 | memset(mem, 0, sizeof(uint64_t) * 15); |
| 83 | char* p = buffer; |
| 84 | while (*p && (numFound < (sizeof(tagsLen) / sizeof(tagsLen[0])))) { |
| 85 | int i = 0; |
| 86 | while (tags[i]) { |
Sandeep Patil | 9f4028d | 2018-11-09 19:18:29 -0800 | [diff] [blame] | 87 | // std::cout << "tag =" << tags[i] << " p = " << std::string(p, tagsLen[i]) << |
| 88 | // std::endl; |
Sandeep Patil | a60a776 | 2018-08-29 17:10:47 -0700 | [diff] [blame] | 89 | if (strncmp(p, tags[i], tagsLen[i]) == 0) { |
| 90 | p += tagsLen[i]; |
| 91 | while (*p == ' ') p++; |
| 92 | char* num = p; |
| 93 | while (*p >= '0' && *p <= '9') p++; |
| 94 | if (*p != 0) { |
| 95 | *p = 0; |
| 96 | p++; |
| 97 | } |
| 98 | mem[i] = atoll(num); |
| 99 | numFound++; |
| 100 | break; |
| 101 | } |
| 102 | i++; |
| 103 | } |
| 104 | while (*p && *p != '\n') { |
| 105 | p++; |
| 106 | } |
| 107 | if (*p) p++; |
| 108 | } |
| 109 | } |
| 110 | |
Sandeep Patil | e473d7e | 2018-12-11 09:28:38 -0800 | [diff] [blame] | 111 | static void BM_ReadMemInfo_old(benchmark::State& state) { |
Sandeep Patil | a60a776 | 2018-08-29 17:10:47 -0700 | [diff] [blame] | 112 | std::string meminfo = R"meminfo(MemTotal: 3019740 kB |
| 113 | MemFree: 1809728 kB |
| 114 | MemAvailable: 2546560 kB |
| 115 | Buffers: 54736 kB |
| 116 | Cached: 776052 kB |
| 117 | SwapCached: 0 kB |
| 118 | Active: 445856 kB |
| 119 | Inactive: 459092 kB |
| 120 | Active(anon): 78492 kB |
| 121 | Inactive(anon): 2240 kB |
| 122 | Active(file): 367364 kB |
| 123 | Inactive(file): 456852 kB |
| 124 | Unevictable: 3096 kB |
| 125 | Mlocked: 3096 kB |
| 126 | SwapTotal: 0 kB |
| 127 | SwapFree: 0 kB |
| 128 | Dirty: 32 kB |
| 129 | Writeback: 0 kB |
| 130 | AnonPages: 74988 kB |
| 131 | Mapped: 62624 kB |
| 132 | Shmem: 4020 kB |
| 133 | Slab: 86464 kB |
| 134 | SReclaimable: 44432 kB |
| 135 | SUnreclaim: 42032 kB |
| 136 | KernelStack: 4880 kB |
| 137 | PageTables: 2900 kB |
| 138 | NFS_Unstable: 0 kB |
| 139 | Bounce: 0 kB |
| 140 | WritebackTmp: 0 kB |
| 141 | CommitLimit: 1509868 kB |
| 142 | Committed_AS: 80296 kB |
| 143 | VmallocTotal: 263061440 kB |
| 144 | VmallocUsed: 0 kB |
| 145 | VmallocChunk: 0 kB |
| 146 | AnonHugePages: 6144 kB |
| 147 | ShmemHugePages: 0 kB |
| 148 | ShmemPmdMapped: 0 kB |
| 149 | CmaTotal: 131072 kB |
| 150 | CmaFree: 130380 kB |
| 151 | HugePages_Total: 0 |
| 152 | HugePages_Free: 0 |
| 153 | HugePages_Rsvd: 0 |
| 154 | HugePages_Surp: 0 |
| 155 | Hugepagesize: 2048 kB)meminfo"; |
| 156 | |
| 157 | TemporaryFile tf; |
| 158 | ::android::base::WriteStringToFd(meminfo, tf.fd); |
| 159 | |
| 160 | uint64_t mem[MEMINFO_COUNT]; |
| 161 | for (auto _ : state) { |
| 162 | get_mem_info(mem, tf.path); |
| 163 | } |
| 164 | } |
Sandeep Patil | e473d7e | 2018-12-11 09:28:38 -0800 | [diff] [blame] | 165 | BENCHMARK(BM_ReadMemInfo_old); |
Sandeep Patil | a60a776 | 2018-08-29 17:10:47 -0700 | [diff] [blame] | 166 | |
Sandeep Patil | e473d7e | 2018-12-11 09:28:38 -0800 | [diff] [blame] | 167 | static void BM_ReadMemInfo_new(benchmark::State& state) { |
Sandeep Patil | a60a776 | 2018-08-29 17:10:47 -0700 | [diff] [blame] | 168 | std::string meminfo = R"meminfo(MemTotal: 3019740 kB |
| 169 | MemFree: 1809728 kB |
| 170 | MemAvailable: 2546560 kB |
| 171 | Buffers: 54736 kB |
| 172 | Cached: 776052 kB |
| 173 | SwapCached: 0 kB |
| 174 | Active: 445856 kB |
| 175 | Inactive: 459092 kB |
| 176 | Active(anon): 78492 kB |
| 177 | Inactive(anon): 2240 kB |
| 178 | Active(file): 367364 kB |
| 179 | Inactive(file): 456852 kB |
| 180 | Unevictable: 3096 kB |
| 181 | Mlocked: 3096 kB |
| 182 | SwapTotal: 0 kB |
| 183 | SwapFree: 0 kB |
| 184 | Dirty: 32 kB |
| 185 | Writeback: 0 kB |
| 186 | AnonPages: 74988 kB |
| 187 | Mapped: 62624 kB |
| 188 | Shmem: 4020 kB |
| 189 | Slab: 86464 kB |
| 190 | SReclaimable: 44432 kB |
| 191 | SUnreclaim: 42032 kB |
| 192 | KernelStack: 4880 kB |
| 193 | PageTables: 2900 kB |
| 194 | NFS_Unstable: 0 kB |
| 195 | Bounce: 0 kB |
| 196 | WritebackTmp: 0 kB |
| 197 | CommitLimit: 1509868 kB |
| 198 | Committed_AS: 80296 kB |
| 199 | VmallocTotal: 263061440 kB |
| 200 | VmallocUsed: 0 kB |
| 201 | VmallocChunk: 0 kB |
| 202 | AnonHugePages: 6144 kB |
| 203 | ShmemHugePages: 0 kB |
| 204 | ShmemPmdMapped: 0 kB |
| 205 | CmaTotal: 131072 kB |
| 206 | CmaFree: 130380 kB |
| 207 | HugePages_Total: 0 |
| 208 | HugePages_Free: 0 |
| 209 | HugePages_Rsvd: 0 |
| 210 | HugePages_Surp: 0 |
| 211 | Hugepagesize: 2048 kB)meminfo"; |
| 212 | |
| 213 | TemporaryFile tf; |
| 214 | android::base::WriteStringToFd(meminfo, tf.fd); |
| 215 | |
| 216 | std::string file = std::string(tf.path); |
Sandeep Patil | e473d7e | 2018-12-11 09:28:38 -0800 | [diff] [blame] | 217 | std::vector<uint64_t> mem(MEMINFO_COUNT); |
| 218 | const std::vector<std::string> tags = { |
| 219 | SysMemInfo::kMemTotal, SysMemInfo::kMemFree, SysMemInfo::kMemBuffers, |
| 220 | SysMemInfo::kMemCached, SysMemInfo::kMemShmem, SysMemInfo::kMemSlab, |
| 221 | SysMemInfo::kMemSReclaim, SysMemInfo::kMemSUnreclaim, SysMemInfo::kMemSwapTotal, |
| 222 | SysMemInfo::kMemSwapFree, SysMemInfo::kMemMapped, SysMemInfo::kMemVmallocUsed, |
| 223 | SysMemInfo::kMemPageTables, SysMemInfo::kMemKernelStack, |
| 224 | }; |
| 225 | |
| 226 | SysMemInfo smi; |
Sandeep Patil | a60a776 | 2018-08-29 17:10:47 -0700 | [diff] [blame] | 227 | for (auto _ : state) { |
Sandeep Patil | e473d7e | 2018-12-11 09:28:38 -0800 | [diff] [blame] | 228 | smi.ReadMemInfo(tags, &mem, file); |
Sandeep Patil | a60a776 | 2018-08-29 17:10:47 -0700 | [diff] [blame] | 229 | } |
| 230 | } |
Sandeep Patil | e473d7e | 2018-12-11 09:28:38 -0800 | [diff] [blame] | 231 | BENCHMARK(BM_ReadMemInfo_new); |
Sandeep Patil | a60a776 | 2018-08-29 17:10:47 -0700 | [diff] [blame] | 232 | |
Sandeep Patil | 9f4028d | 2018-11-09 19:18:29 -0800 | [diff] [blame] | 233 | static uint64_t get_zram_mem_used(const std::string& zram_dir) { |
| 234 | FILE* f = fopen((zram_dir + "mm_stat").c_str(), "r"); |
| 235 | if (f) { |
| 236 | uint64_t mem_used_total = 0; |
| 237 | |
| 238 | int matched = fscanf(f, "%*d %*d %" SCNu64 " %*d %*d %*d %*d", &mem_used_total); |
| 239 | if (matched != 1) |
| 240 | fprintf(stderr, "warning: failed to parse %s\n", (zram_dir + "mm_stat").c_str()); |
| 241 | |
| 242 | fclose(f); |
| 243 | return mem_used_total; |
| 244 | } |
| 245 | |
| 246 | f = fopen((zram_dir + "mem_used_total").c_str(), "r"); |
| 247 | if (f) { |
| 248 | uint64_t mem_used_total = 0; |
| 249 | |
| 250 | int matched = fscanf(f, "%" SCNu64, &mem_used_total); |
| 251 | if (matched != 1) |
| 252 | fprintf(stderr, "warning: failed to parse %s\n", (zram_dir + "mem_used_total").c_str()); |
| 253 | |
| 254 | fclose(f); |
| 255 | return mem_used_total; |
| 256 | } |
| 257 | |
| 258 | return 0; |
| 259 | } |
| 260 | |
Sandeep Patil | e473d7e | 2018-12-11 09:28:38 -0800 | [diff] [blame] | 261 | static void BM_ZramTotal_old(benchmark::State& state) { |
Sandeep Patil | 9f4028d | 2018-11-09 19:18:29 -0800 | [diff] [blame] | 262 | std::string exec_dir = ::android::base::GetExecutableDirectory(); |
| 263 | std::string zram_mmstat_dir = exec_dir + "/testdata1/"; |
| 264 | for (auto _ : state) { |
| 265 | uint64_t zram_total __attribute__((unused)) = get_zram_mem_used(zram_mmstat_dir) / 1024; |
| 266 | } |
| 267 | } |
Sandeep Patil | e473d7e | 2018-12-11 09:28:38 -0800 | [diff] [blame] | 268 | BENCHMARK(BM_ZramTotal_old); |
Sandeep Patil | 9f4028d | 2018-11-09 19:18:29 -0800 | [diff] [blame] | 269 | |
Sandeep Patil | e473d7e | 2018-12-11 09:28:38 -0800 | [diff] [blame] | 270 | static void BM_ZramTotal_new(benchmark::State& state) { |
Sandeep Patil | 9f4028d | 2018-11-09 19:18:29 -0800 | [diff] [blame] | 271 | std::string exec_dir = ::android::base::GetExecutableDirectory(); |
| 272 | std::string zram_mmstat_dir = exec_dir + "/testdata1/"; |
Sandeep Patil | e473d7e | 2018-12-11 09:28:38 -0800 | [diff] [blame] | 273 | SysMemInfo smi; |
Sandeep Patil | 9f4028d | 2018-11-09 19:18:29 -0800 | [diff] [blame] | 274 | for (auto _ : state) { |
Sandeep Patil | e473d7e | 2018-12-11 09:28:38 -0800 | [diff] [blame] | 275 | uint64_t zram_total __attribute__((unused)) = smi.mem_zram_kb(zram_mmstat_dir); |
Sandeep Patil | 9f4028d | 2018-11-09 19:18:29 -0800 | [diff] [blame] | 276 | } |
| 277 | } |
Sandeep Patil | e473d7e | 2018-12-11 09:28:38 -0800 | [diff] [blame] | 278 | BENCHMARK(BM_ZramTotal_new); |
| 279 | |
| 280 | static void BM_MemInfoWithZram_old(benchmark::State& state) { |
| 281 | std::string meminfo = R"meminfo(MemTotal: 3019740 kB |
| 282 | MemFree: 1809728 kB |
| 283 | MemAvailable: 2546560 kB |
| 284 | Buffers: 54736 kB |
| 285 | Cached: 776052 kB |
| 286 | SwapCached: 0 kB |
| 287 | Active: 445856 kB |
| 288 | Inactive: 459092 kB |
| 289 | Active(anon): 78492 kB |
| 290 | Inactive(anon): 2240 kB |
| 291 | Active(file): 367364 kB |
| 292 | Inactive(file): 456852 kB |
| 293 | Unevictable: 3096 kB |
| 294 | Mlocked: 3096 kB |
| 295 | SwapTotal: 0 kB |
| 296 | SwapFree: 0 kB |
| 297 | Dirty: 32 kB |
| 298 | Writeback: 0 kB |
| 299 | AnonPages: 74988 kB |
| 300 | Mapped: 62624 kB |
| 301 | Shmem: 4020 kB |
| 302 | Slab: 86464 kB |
| 303 | SReclaimable: 44432 kB |
| 304 | SUnreclaim: 42032 kB |
| 305 | KernelStack: 4880 kB |
| 306 | PageTables: 2900 kB |
| 307 | NFS_Unstable: 0 kB |
| 308 | Bounce: 0 kB |
| 309 | WritebackTmp: 0 kB |
| 310 | CommitLimit: 1509868 kB |
| 311 | Committed_AS: 80296 kB |
| 312 | VmallocTotal: 263061440 kB |
| 313 | VmallocUsed: 0 kB |
| 314 | VmallocChunk: 0 kB |
| 315 | AnonHugePages: 6144 kB |
| 316 | ShmemHugePages: 0 kB |
| 317 | ShmemPmdMapped: 0 kB |
| 318 | CmaTotal: 131072 kB |
| 319 | CmaFree: 130380 kB |
| 320 | HugePages_Total: 0 |
| 321 | HugePages_Free: 0 |
| 322 | HugePages_Rsvd: 0 |
| 323 | HugePages_Surp: 0 |
| 324 | Hugepagesize: 2048 kB)meminfo"; |
| 325 | |
| 326 | TemporaryFile tf; |
| 327 | ::android::base::WriteStringToFd(meminfo, tf.fd); |
| 328 | std::string exec_dir = ::android::base::GetExecutableDirectory(); |
| 329 | std::string zram_mmstat_dir = exec_dir + "/testdata1/"; |
| 330 | uint64_t mem[MEMINFO_COUNT]; |
| 331 | for (auto _ : state) { |
| 332 | get_mem_info(mem, tf.path); |
| 333 | mem[MEMINFO_ZRAM_TOTAL] = get_zram_mem_used("/sys/block/zram0/") / 1024; |
| 334 | CHECK_EQ(mem[MEMINFO_KERNEL_STACK], 4880u); |
| 335 | } |
| 336 | } |
| 337 | BENCHMARK(BM_MemInfoWithZram_old); |
| 338 | |
| 339 | static void BM_MemInfoWithZram_new(benchmark::State& state) { |
| 340 | std::string meminfo = R"meminfo(MemTotal: 3019740 kB |
| 341 | MemFree: 1809728 kB |
| 342 | MemAvailable: 2546560 kB |
| 343 | Buffers: 54736 kB |
| 344 | Cached: 776052 kB |
| 345 | SwapCached: 0 kB |
| 346 | Active: 445856 kB |
| 347 | Inactive: 459092 kB |
| 348 | Active(anon): 78492 kB |
| 349 | Inactive(anon): 2240 kB |
| 350 | Active(file): 367364 kB |
| 351 | Inactive(file): 456852 kB |
| 352 | Unevictable: 3096 kB |
| 353 | Mlocked: 3096 kB |
| 354 | SwapTotal: 0 kB |
| 355 | SwapFree: 0 kB |
| 356 | Dirty: 32 kB |
| 357 | Writeback: 0 kB |
| 358 | AnonPages: 74988 kB |
| 359 | Mapped: 62624 kB |
| 360 | Shmem: 4020 kB |
| 361 | Slab: 86464 kB |
| 362 | SReclaimable: 44432 kB |
| 363 | SUnreclaim: 42032 kB |
| 364 | KernelStack: 4880 kB |
| 365 | PageTables: 2900 kB |
| 366 | NFS_Unstable: 0 kB |
| 367 | Bounce: 0 kB |
| 368 | WritebackTmp: 0 kB |
| 369 | CommitLimit: 1509868 kB |
| 370 | Committed_AS: 80296 kB |
| 371 | VmallocTotal: 263061440 kB |
| 372 | VmallocUsed: 0 kB |
| 373 | VmallocChunk: 0 kB |
| 374 | AnonHugePages: 6144 kB |
| 375 | ShmemHugePages: 0 kB |
| 376 | ShmemPmdMapped: 0 kB |
| 377 | CmaTotal: 131072 kB |
| 378 | CmaFree: 130380 kB |
| 379 | HugePages_Total: 0 |
| 380 | HugePages_Free: 0 |
| 381 | HugePages_Rsvd: 0 |
| 382 | HugePages_Surp: 0 |
| 383 | Hugepagesize: 2048 kB)meminfo"; |
| 384 | |
| 385 | TemporaryFile tf; |
| 386 | android::base::WriteStringToFd(meminfo, tf.fd); |
| 387 | |
| 388 | std::string file = std::string(tf.path); |
| 389 | std::vector<uint64_t> mem(MEMINFO_COUNT); |
| 390 | std::vector<std::string> tags(SysMemInfo::kDefaultSysMemInfoTags); |
| 391 | auto it = tags.begin(); |
| 392 | tags.insert(it + MEMINFO_ZRAM_TOTAL, "Zram:"); |
| 393 | SysMemInfo smi; |
| 394 | |
| 395 | for (auto _ : state) { |
| 396 | smi.ReadMemInfo(tags, &mem, file); |
| 397 | CHECK_EQ(mem[MEMINFO_KERNEL_STACK], 4880u); |
| 398 | } |
| 399 | } |
| 400 | BENCHMARK(BM_MemInfoWithZram_new); |
Sandeep Patil | 9f4028d | 2018-11-09 19:18:29 -0800 | [diff] [blame] | 401 | |
Sandeep Patil | 76a34f0 | 2018-12-29 14:34:20 -0800 | [diff] [blame^] | 402 | // Current implementation is in frameworks/base/core/jni/android_os_Debug.cpp. |
| 403 | // That implementation is still buggy and it skips over vmalloc allocated memory by kernel modules. |
| 404 | // This is the *fixed* version of the same implementation intended for benchmarking against the new |
| 405 | // one. |
| 406 | static uint64_t get_allocated_vmalloc_memory(const std::string& vm_file) { |
| 407 | char line[1024]; |
| 408 | |
| 409 | uint64_t vmalloc_allocated_size = 0; |
| 410 | auto fp = std::unique_ptr<FILE, decltype(&fclose)>{fopen(vm_file.c_str(), "re"), fclose}; |
| 411 | if (fp == nullptr) { |
| 412 | return 0; |
| 413 | } |
| 414 | |
| 415 | while (true) { |
| 416 | if (fgets(line, 1024, fp.get()) == NULL) { |
| 417 | break; |
| 418 | } |
| 419 | |
| 420 | // check to see if there are pages mapped in vmalloc area |
| 421 | if (!strstr(line, "pages=")) { |
| 422 | continue; |
| 423 | } |
| 424 | |
| 425 | long nr_pages; |
| 426 | if (sscanf(line, "%*x-%*x %*ld %*s pages=%ld", &nr_pages) == 1) { |
| 427 | vmalloc_allocated_size += (nr_pages * getpagesize()); |
| 428 | } else if (sscanf(line, "%*x-%*x %*ld %*s %*s pages=%ld", &nr_pages) == 1) { |
| 429 | // The second case is for kernel modules. If allocation comes from the module, |
| 430 | // kernel puts an extra string containing the module name before "pages=" in |
| 431 | // the line. |
| 432 | // See: https://elixir.bootlin.com/linux/latest/source/kernel/kallsyms.c#L373 |
| 433 | vmalloc_allocated_size += (nr_pages * getpagesize()); |
| 434 | } |
| 435 | } |
| 436 | return vmalloc_allocated_size; |
| 437 | } |
| 438 | |
| 439 | static void BM_VmallocInfo_old_fixed(benchmark::State& state) { |
| 440 | std::string exec_dir = ::android::base::GetExecutableDirectory(); |
| 441 | std::string vmallocinfo = |
| 442 | ::android::base::StringPrintf("%s/testdata1/vmallocinfo", exec_dir.c_str()); |
| 443 | for (auto _ : state) { |
| 444 | CHECK_EQ(get_allocated_vmalloc_memory(vmallocinfo), 29884416); |
| 445 | } |
| 446 | } |
| 447 | BENCHMARK(BM_VmallocInfo_old_fixed); |
| 448 | |
| 449 | static void BM_VmallocInfo_new(benchmark::State& state) { |
| 450 | std::string exec_dir = ::android::base::GetExecutableDirectory(); |
| 451 | std::string vmallocinfo = |
| 452 | ::android::base::StringPrintf("%s/testdata1/vmallocinfo", exec_dir.c_str()); |
| 453 | for (auto _ : state) { |
| 454 | SysMemInfo smi; |
| 455 | CHECK_EQ(smi.ReadVmallocInfo(vmallocinfo), 29884416); |
| 456 | } |
| 457 | } |
| 458 | BENCHMARK(BM_VmallocInfo_new); |
| 459 | |
Sandeep Patil | a60a776 | 2018-08-29 17:10:47 -0700 | [diff] [blame] | 460 | BENCHMARK_MAIN(); |