Commit | Line | Data |
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a6ab5391 SW |
1 | #define FIO_MAX_CPUS 512 /* From Hyper-V 2016's max logical processors */ |
2 | #define FIO_CPU_MASK_STRIDE 64 | |
3 | #define FIO_CPU_MASK_ROWS (FIO_MAX_CPUS / FIO_CPU_MASK_STRIDE) | |
4 | ||
5 | typedef struct { | |
6 | uint64_t row[FIO_CPU_MASK_ROWS]; | |
7 | } os_cpu_mask_t; | |
8 | ||
9 | #define FIO_HAVE_CPU_ONLINE_SYSCONF | |
10 | /* Return all processors regardless of processor group */ | |
11 | static inline unsigned int cpus_online(void) | |
12 | { | |
13 | return GetMaximumProcessorCount(ALL_PROCESSOR_GROUPS); | |
14 | } | |
15 | ||
16 | static inline void print_mask(os_cpu_mask_t *cpumask) | |
17 | { | |
18 | for (int i = 0; i < FIO_CPU_MASK_ROWS; i++) | |
19 | dprint(FD_PROCESS, "cpumask[%d]=%lu\n", i, cpumask->row[i]); | |
20 | } | |
21 | ||
22 | /* Return the index of the least significant set CPU in cpumask or -1 if no | |
23 | * CPUs are set */ | |
24 | static inline int first_set_cpu(os_cpu_mask_t *cpumask) | |
25 | { | |
26 | int cpus_offset, mask_first_cpu, row; | |
27 | ||
28 | cpus_offset = 0; | |
29 | row = 0; | |
30 | mask_first_cpu = -1; | |
31 | while (mask_first_cpu < 0 && row < FIO_CPU_MASK_ROWS) { | |
32 | int row_first_cpu; | |
33 | ||
34 | row_first_cpu = __builtin_ffsll(cpumask->row[row]) - 1; | |
35 | dprint(FD_PROCESS, "row_first_cpu=%d cpumask->row[%d]=%lu\n", | |
36 | row_first_cpu, row, cpumask->row[row]); | |
37 | if (row_first_cpu > -1) { | |
38 | mask_first_cpu = cpus_offset + row_first_cpu; | |
39 | dprint(FD_PROCESS, "first set cpu in mask is at index %d\n", | |
40 | mask_first_cpu); | |
41 | } else { | |
42 | cpus_offset += FIO_CPU_MASK_STRIDE; | |
43 | row++; | |
44 | } | |
45 | } | |
46 | ||
47 | return mask_first_cpu; | |
48 | } | |
49 | ||
50 | /* Return the index of the most significant set CPU in cpumask or -1 if no | |
51 | * CPUs are set */ | |
52 | static inline int last_set_cpu(os_cpu_mask_t *cpumask) | |
53 | { | |
54 | int cpus_offset, mask_last_cpu, row; | |
55 | ||
56 | cpus_offset = (FIO_CPU_MASK_ROWS - 1) * FIO_CPU_MASK_STRIDE; | |
57 | row = FIO_CPU_MASK_ROWS - 1; | |
58 | mask_last_cpu = -1; | |
59 | while (mask_last_cpu < 0 && row >= 0) { | |
60 | int row_last_cpu; | |
61 | ||
62 | if (cpumask->row[row] == 0) | |
63 | row_last_cpu = -1; | |
64 | else { | |
65 | uint64_t tmp = cpumask->row[row]; | |
66 | ||
67 | row_last_cpu = 0; | |
68 | while (tmp >>= 1) | |
69 | row_last_cpu++; | |
70 | } | |
71 | ||
72 | dprint(FD_PROCESS, "row_last_cpu=%d cpumask->row[%d]=%lu\n", | |
73 | row_last_cpu, row, cpumask->row[row]); | |
74 | if (row_last_cpu > -1) { | |
75 | mask_last_cpu = cpus_offset + row_last_cpu; | |
76 | dprint(FD_PROCESS, "last set cpu in mask is at index %d\n", | |
77 | mask_last_cpu); | |
78 | } else { | |
79 | cpus_offset -= FIO_CPU_MASK_STRIDE; | |
80 | row--; | |
81 | } | |
82 | } | |
83 | ||
84 | return mask_last_cpu; | |
85 | } | |
86 | ||
87 | static inline int mask_to_group_mask(os_cpu_mask_t *cpumask, int *processor_group, uint64_t *affinity_mask) | |
88 | { | |
89 | WORD online_groups, group, group_size; | |
90 | bool found; | |
91 | int cpus_offset, search_cpu, last_cpu, bit_offset, row, end; | |
92 | uint64_t group_cpumask; | |
93 | ||
94 | search_cpu = first_set_cpu(cpumask); | |
95 | if (search_cpu < 0) { | |
96 | log_info("CPU mask doesn't set any CPUs\n"); | |
97 | return 1; | |
98 | } | |
99 | ||
100 | /* Find processor group first set CPU applies to */ | |
101 | online_groups = GetActiveProcessorGroupCount(); | |
102 | group = 0; | |
103 | found = false; | |
104 | cpus_offset = 0; | |
105 | group_size = 0; | |
106 | while (!found && group < online_groups) { | |
107 | group_size = GetMaximumProcessorCount(group); | |
108 | dprint(FD_PROCESS, "group=%d group_start=%d group_size=%u search_cpu=%d\n", | |
109 | group, cpus_offset, group_size, search_cpu); | |
110 | if (cpus_offset + group_size > search_cpu) | |
111 | found = true; | |
112 | else { | |
113 | cpus_offset += group_size; | |
114 | group++; | |
115 | } | |
116 | } | |
117 | ||
118 | if (!found) { | |
119 | log_err("CPU mask contains processor beyond last active processor index (%d)\n", | |
120 | cpus_offset - 1); | |
121 | print_mask(cpumask); | |
122 | return 1; | |
123 | } | |
124 | ||
125 | /* Check all the CPUs in the mask apply to ONLY that processor group */ | |
126 | last_cpu = last_set_cpu(cpumask); | |
127 | if (last_cpu > (cpus_offset + group_size - 1)) { | |
128 | log_info("CPU mask cannot bind CPUs (e.g. %d, %d) that are " | |
129 | "in different processor groups\n", search_cpu, | |
130 | last_cpu); | |
131 | print_mask(cpumask); | |
132 | return 1; | |
133 | } | |
134 | ||
135 | /* Extract the current processor group mask from the cpumask */ | |
136 | row = cpus_offset / FIO_CPU_MASK_STRIDE; | |
137 | bit_offset = cpus_offset % FIO_CPU_MASK_STRIDE; | |
138 | group_cpumask = cpumask->row[row] >> bit_offset; | |
139 | end = bit_offset + group_size; | |
140 | if (end > FIO_CPU_MASK_STRIDE && (row + 1 < FIO_CPU_MASK_ROWS)) { | |
141 | /* Some of the next row needs to be part of the mask */ | |
142 | int needed, needed_shift, needed_mask_shift; | |
143 | uint64_t needed_mask; | |
144 | ||
145 | needed = end - FIO_CPU_MASK_STRIDE; | |
146 | needed_shift = FIO_CPU_MASK_STRIDE - bit_offset; | |
147 | needed_mask_shift = FIO_CPU_MASK_STRIDE - needed; | |
148 | needed_mask = (uint64_t)-1 >> needed_mask_shift; | |
149 | dprint(FD_PROCESS, "bit_offset=%d end=%d needed=%d needed_shift=%d needed_mask=%ld needed_mask_shift=%d\n", bit_offset, end, needed, needed_shift, needed_mask, needed_mask_shift); | |
150 | group_cpumask |= (cpumask->row[row + 1] & needed_mask) << needed_shift; | |
151 | } | |
152 | group_cpumask &= (uint64_t)-1 >> (FIO_CPU_MASK_STRIDE - group_size); | |
153 | ||
154 | /* Return group and mask */ | |
155 | dprint(FD_PROCESS, "Returning group=%d group_mask=%lu\n", group, group_cpumask); | |
156 | *processor_group = group; | |
157 | *affinity_mask = group_cpumask; | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
162 | static inline int fio_setaffinity(int pid, os_cpu_mask_t cpumask) | |
163 | { | |
164 | HANDLE handle = NULL; | |
165 | int group, ret; | |
166 | uint64_t group_mask = 0; | |
167 | GROUP_AFFINITY new_group_affinity; | |
168 | ||
169 | ret = -1; | |
170 | ||
171 | if (mask_to_group_mask(&cpumask, &group, &group_mask) != 0) | |
172 | goto err; | |
173 | ||
174 | handle = OpenThread(THREAD_QUERY_INFORMATION | THREAD_SET_INFORMATION, | |
175 | TRUE, pid); | |
176 | if (handle == NULL) { | |
177 | log_err("fio_setaffinity: failed to get handle for pid %d\n", pid); | |
178 | goto err; | |
179 | } | |
180 | ||
181 | /* Set group and mask. | |
182 | * Note: if the GROUP_AFFINITY struct's Reserved members are not | |
183 | * initialised to 0 then SetThreadGroupAffinity will fail with | |
184 | * GetLastError() set to ERROR_INVALID_PARAMETER */ | |
185 | new_group_affinity.Mask = (KAFFINITY) group_mask; | |
186 | new_group_affinity.Group = group; | |
187 | new_group_affinity.Reserved[0] = 0; | |
188 | new_group_affinity.Reserved[1] = 0; | |
189 | new_group_affinity.Reserved[2] = 0; | |
190 | if (SetThreadGroupAffinity(handle, &new_group_affinity, NULL) != 0) | |
191 | ret = 0; | |
192 | else { | |
193 | log_err("fio_setaffinity: failed to set thread affinity " | |
194 | "(pid %d, group %d, mask %" PRIx64 ", " | |
195 | "GetLastError=%d)\n", pid, group, group_mask, | |
196 | GetLastError()); | |
197 | goto err; | |
198 | } | |
199 | ||
200 | err: | |
201 | if (handle) | |
202 | CloseHandle(handle); | |
203 | return ret; | |
204 | } | |
205 | ||
206 | static inline void cpu_to_row_offset(int cpu, int *row, int *offset) | |
207 | { | |
208 | *row = cpu / FIO_CPU_MASK_STRIDE; | |
209 | *offset = cpu << FIO_CPU_MASK_STRIDE * *row; | |
210 | } | |
211 | ||
212 | static inline int fio_cpuset_init(os_cpu_mask_t *mask) | |
213 | { | |
214 | for (int i = 0; i < FIO_CPU_MASK_ROWS; i++) | |
215 | mask->row[i] = 0; | |
216 | return 0; | |
217 | } | |
218 | ||
219 | /* | |
220 | * fio_getaffinity() should not be called once a fio_setaffinity() call has | |
221 | * been made because fio_setaffinity() may put the process into multiple | |
222 | * processor groups | |
223 | */ | |
224 | static inline int fio_getaffinity(int pid, os_cpu_mask_t *mask) | |
225 | { | |
226 | int ret; | |
227 | int row, offset, end, group, group_size, group_start_cpu; | |
228 | DWORD_PTR process_mask, system_mask; | |
229 | HANDLE handle; | |
230 | PUSHORT current_groups; | |
231 | USHORT group_count; | |
232 | WORD online_groups; | |
233 | ||
234 | ret = -1; | |
235 | current_groups = NULL; | |
236 | handle = OpenProcess(PROCESS_QUERY_INFORMATION, TRUE, pid); | |
237 | if (handle == NULL) { | |
238 | log_err("fio_getaffinity: failed to get handle for pid %d\n", | |
239 | pid); | |
240 | goto err; | |
241 | } | |
242 | ||
243 | group_count = 1; | |
244 | /* | |
245 | * GetProcessGroupAffinity() seems to expect more than the natural | |
246 | * alignment for a USHORT from the area pointed to by current_groups so | |
247 | * arrange for maximum alignment by allocating via malloc() | |
248 | */ | |
249 | current_groups = malloc(sizeof(USHORT)); | |
250 | if (!current_groups) { | |
251 | log_err("fio_getaffinity: malloc failed\n"); | |
252 | goto err; | |
253 | } | |
254 | if (GetProcessGroupAffinity(handle, &group_count, current_groups) == 0) { | |
255 | /* NB: we also fail here if we are a multi-group process */ | |
256 | log_err("fio_getaffinity: failed to get single group affinity for pid %d\n", pid); | |
257 | goto err; | |
258 | } | |
259 | GetProcessAffinityMask(handle, &process_mask, &system_mask); | |
260 | ||
261 | /* Convert group and group relative mask to full CPU mask */ | |
262 | online_groups = GetActiveProcessorGroupCount(); | |
263 | if (online_groups == 0) { | |
264 | log_err("fio_getaffinity: error retrieving total processor groups\n"); | |
265 | goto err; | |
266 | } | |
267 | ||
268 | group = 0; | |
269 | group_start_cpu = 0; | |
270 | group_size = 0; | |
271 | dprint(FD_PROCESS, "current_groups=%d group_count=%d\n", | |
272 | current_groups[0], group_count); | |
273 | while (true) { | |
274 | group_size = GetMaximumProcessorCount(group); | |
275 | if (group_size == 0) { | |
276 | log_err("fio_getaffinity: error retrieving size of " | |
277 | "processor group %d\n", group); | |
278 | goto err; | |
279 | } else if (group >= current_groups[0] || group >= online_groups) | |
280 | break; | |
281 | else { | |
282 | group_start_cpu += group_size; | |
283 | group++; | |
284 | } | |
285 | } | |
286 | ||
287 | if (group != current_groups[0]) { | |
288 | log_err("fio_getaffinity: could not find processor group %d\n", | |
289 | current_groups[0]); | |
290 | goto err; | |
291 | } | |
292 | ||
293 | dprint(FD_PROCESS, "group_start_cpu=%d, group size=%u\n", | |
294 | group_start_cpu, group_size); | |
295 | if ((group_start_cpu + group_size) >= FIO_MAX_CPUS) { | |
296 | log_err("fio_getaffinity failed: current CPU affinity (group " | |
297 | "%d, group_start_cpu %d, group_size %d) extends " | |
298 | "beyond mask's highest CPU (%d)\n", group, | |
299 | group_start_cpu, group_size, FIO_MAX_CPUS); | |
300 | goto err; | |
301 | } | |
302 | ||
303 | fio_cpuset_init(mask); | |
304 | cpu_to_row_offset(group_start_cpu, &row, &offset); | |
305 | mask->row[row] = process_mask; | |
306 | mask->row[row] <<= offset; | |
307 | end = offset + group_size; | |
308 | if (end > FIO_CPU_MASK_STRIDE) { | |
309 | int needed; | |
310 | uint64_t needed_mask; | |
311 | ||
312 | needed = FIO_CPU_MASK_STRIDE - end; | |
313 | needed_mask = (uint64_t)-1 >> (FIO_CPU_MASK_STRIDE - needed); | |
314 | row++; | |
315 | mask->row[row] = process_mask; | |
316 | mask->row[row] >>= needed; | |
317 | mask->row[row] &= needed_mask; | |
318 | } | |
319 | ret = 0; | |
320 | ||
321 | err: | |
322 | if (handle) | |
323 | CloseHandle(handle); | |
324 | if (current_groups) | |
325 | free(current_groups); | |
326 | ||
327 | return ret; | |
328 | } | |
329 | ||
330 | static inline void fio_cpu_clear(os_cpu_mask_t *mask, int cpu) | |
331 | { | |
332 | int row, offset; | |
333 | cpu_to_row_offset(cpu, &row, &offset); | |
334 | ||
335 | mask->row[row] &= ~(1ULL << offset); | |
336 | } | |
337 | ||
338 | static inline void fio_cpu_set(os_cpu_mask_t *mask, int cpu) | |
339 | { | |
340 | int row, offset; | |
341 | cpu_to_row_offset(cpu, &row, &offset); | |
342 | ||
343 | mask->row[row] |= 1ULL << offset; | |
344 | } | |
345 | ||
346 | static inline int fio_cpu_isset(os_cpu_mask_t *mask, int cpu) | |
347 | { | |
348 | int row, offset; | |
349 | cpu_to_row_offset(cpu, &row, &offset); | |
350 | ||
351 | return (mask->row[row] & (1ULL << offset)) != 0; | |
352 | } | |
353 | ||
354 | static inline int fio_cpu_count(os_cpu_mask_t *mask) | |
355 | { | |
356 | int count = 0; | |
357 | ||
358 | for (int i = 0; i < FIO_CPU_MASK_ROWS; i++) | |
359 | count += hweight64(mask->row[i]); | |
360 | ||
361 | return count; | |
362 | } | |
363 | ||
364 | static inline int fio_cpuset_exit(os_cpu_mask_t *mask) | |
365 | { | |
366 | return 0; | |
367 | } |