5 #ifdef CONFIG_WINDOWS_XP
6 int fio_setaffinity(int pid, os_cpu_mask_t cpumask)
11 h = OpenThread(THREAD_QUERY_INFORMATION | THREAD_SET_INFORMATION, TRUE,
14 bSuccess = SetThreadAffinityMask(h, cpumask);
16 log_err("fio_setaffinity failed: failed to set thread affinity (pid %d, mask %.16llx)\n",
21 log_err("fio_setaffinity failed: failed to get handle for pid %d\n",
25 return bSuccess ? 0 : -1;
28 int fio_getaffinity(int pid, os_cpu_mask_t *mask)
30 os_cpu_mask_t systemMask;
32 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, TRUE, pid);
35 GetProcessAffinityMask(h, mask, &systemMask);
38 log_err("fio_getaffinity failed: failed to get handle for pid %d\n",
46 void fio_cpu_clear(os_cpu_mask_t *mask, int cpu)
48 *mask &= ~(1ULL << cpu);
51 void fio_cpu_set(os_cpu_mask_t *mask, int cpu)
56 int fio_cpu_isset(os_cpu_mask_t *mask, int cpu)
58 return (*mask & (1ULL << cpu)) != 0;
61 int fio_cpu_count(os_cpu_mask_t *mask)
63 return hweight64(*mask);
66 int fio_cpuset_init(os_cpu_mask_t *mask)
72 int fio_cpuset_exit(os_cpu_mask_t *mask)
76 #else /* CONFIG_WINDOWS_XP */
77 /* Return all processors regardless of processor group */
78 unsigned int cpus_online(void)
80 return GetActiveProcessorCount(ALL_PROCESSOR_GROUPS);
83 static void print_mask(os_cpu_mask_t *cpumask)
85 for (int i = 0; i < FIO_CPU_MASK_ROWS; i++)
86 dprint(FD_PROCESS, "cpumask[%d]=%lu\n", i, cpumask->row[i]);
89 /* Return the index of the least significant set CPU in cpumask or -1 if no
91 int first_set_cpu(os_cpu_mask_t *cpumask)
93 int cpus_offset, mask_first_cpu, row;
98 while (mask_first_cpu < 0 && row < FIO_CPU_MASK_ROWS) {
101 row_first_cpu = __builtin_ffsll(cpumask->row[row]) - 1;
102 dprint(FD_PROCESS, "row_first_cpu=%d cpumask->row[%d]=%lu\n",
103 row_first_cpu, row, cpumask->row[row]);
104 if (row_first_cpu > -1) {
105 mask_first_cpu = cpus_offset + row_first_cpu;
106 dprint(FD_PROCESS, "first set cpu in mask is at index %d\n",
109 cpus_offset += FIO_CPU_MASK_STRIDE;
114 return mask_first_cpu;
117 /* Return the index of the most significant set CPU in cpumask or -1 if no
119 static int last_set_cpu(os_cpu_mask_t *cpumask)
121 int cpus_offset, mask_last_cpu, row;
123 cpus_offset = (FIO_CPU_MASK_ROWS - 1) * FIO_CPU_MASK_STRIDE;
124 row = FIO_CPU_MASK_ROWS - 1;
126 while (mask_last_cpu < 0 && row >= 0) {
129 if (cpumask->row[row] == 0)
132 uint64_t tmp = cpumask->row[row];
139 dprint(FD_PROCESS, "row_last_cpu=%d cpumask->row[%d]=%lu\n",
140 row_last_cpu, row, cpumask->row[row]);
141 if (row_last_cpu > -1) {
142 mask_last_cpu = cpus_offset + row_last_cpu;
143 dprint(FD_PROCESS, "last set cpu in mask is at index %d\n",
146 cpus_offset -= FIO_CPU_MASK_STRIDE;
151 return mask_last_cpu;
154 static int mask_to_group_mask(os_cpu_mask_t *cpumask, int *processor_group, uint64_t *affinity_mask)
156 WORD online_groups, group, group_size;
158 int cpus_offset, search_cpu, last_cpu, bit_offset, row, end;
159 uint64_t group_cpumask;
161 search_cpu = first_set_cpu(cpumask);
162 if (search_cpu < 0) {
163 log_info("CPU mask doesn't set any CPUs\n");
167 /* Find processor group first set CPU applies to */
168 online_groups = GetActiveProcessorGroupCount();
173 while (!found && group < online_groups) {
174 group_size = GetActiveProcessorCount(group);
175 dprint(FD_PROCESS, "group=%d group_start=%d group_size=%u search_cpu=%d\n",
176 group, cpus_offset, group_size, search_cpu);
177 if (cpus_offset + group_size > search_cpu)
180 cpus_offset += group_size;
186 log_err("CPU mask contains processor beyond last active processor index (%d)\n",
192 /* Check all the CPUs in the mask apply to ONLY that processor group */
193 last_cpu = last_set_cpu(cpumask);
194 if (last_cpu > (cpus_offset + group_size - 1)) {
195 log_info("CPU mask cannot bind CPUs (e.g. %d, %d) that are "
196 "in different processor groups\n", search_cpu,
202 /* Extract the current processor group mask from the cpumask */
203 row = cpus_offset / FIO_CPU_MASK_STRIDE;
204 bit_offset = cpus_offset % FIO_CPU_MASK_STRIDE;
205 group_cpumask = cpumask->row[row] >> bit_offset;
206 end = bit_offset + group_size;
207 if (end > FIO_CPU_MASK_STRIDE && (row + 1 < FIO_CPU_MASK_ROWS)) {
208 /* Some of the next row needs to be part of the mask */
209 int needed, needed_shift, needed_mask_shift;
210 uint64_t needed_mask;
212 needed = end - FIO_CPU_MASK_STRIDE;
213 needed_shift = FIO_CPU_MASK_STRIDE - bit_offset;
214 needed_mask_shift = FIO_CPU_MASK_STRIDE - needed;
215 needed_mask = (uint64_t)-1 >> needed_mask_shift;
216 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);
217 group_cpumask |= (cpumask->row[row + 1] & needed_mask) << needed_shift;
219 group_cpumask &= (uint64_t)-1 >> (FIO_CPU_MASK_STRIDE - group_size);
221 /* Return group and mask */
222 dprint(FD_PROCESS, "Returning group=%d group_mask=%lu\n", group, group_cpumask);
223 *processor_group = group;
224 *affinity_mask = group_cpumask;
229 int fio_setaffinity(int pid, os_cpu_mask_t cpumask)
231 HANDLE handle = NULL;
233 uint64_t group_mask = 0;
234 GROUP_AFFINITY new_group_affinity;
238 if (mask_to_group_mask(&cpumask, &group, &group_mask) != 0)
241 handle = OpenThread(THREAD_QUERY_INFORMATION | THREAD_SET_INFORMATION,
243 if (handle == NULL) {
244 log_err("fio_setaffinity: failed to get handle for pid %d\n", pid);
248 /* Set group and mask.
249 * Note: if the GROUP_AFFINITY struct's Reserved members are not
250 * initialised to 0 then SetThreadGroupAffinity will fail with
251 * GetLastError() set to ERROR_INVALID_PARAMETER */
252 new_group_affinity.Mask = (KAFFINITY) group_mask;
253 new_group_affinity.Group = group;
254 new_group_affinity.Reserved[0] = 0;
255 new_group_affinity.Reserved[1] = 0;
256 new_group_affinity.Reserved[2] = 0;
257 if (SetThreadGroupAffinity(handle, &new_group_affinity, NULL) != 0)
260 log_err("fio_setaffinity: failed to set thread affinity "
261 "(pid %d, group %d, mask %" PRIx64 ", "
262 "GetLastError=%d)\n", pid, group, group_mask,
273 static void cpu_to_row_offset(int cpu, int *row, int *offset)
275 *row = cpu / FIO_CPU_MASK_STRIDE;
276 *offset = cpu << FIO_CPU_MASK_STRIDE * *row;
279 int fio_cpuset_init(os_cpu_mask_t *mask)
281 for (int i = 0; i < FIO_CPU_MASK_ROWS; i++)
287 * fio_getaffinity() should not be called once a fio_setaffinity() call has
288 * been made because fio_setaffinity() may put the process into multiple
291 int fio_getaffinity(int pid, os_cpu_mask_t *mask)
294 int row, offset, end, group, group_size, group_start_cpu;
295 DWORD_PTR process_mask, system_mask;
297 PUSHORT current_groups;
302 current_groups = NULL;
303 handle = OpenProcess(PROCESS_QUERY_INFORMATION, TRUE, pid);
304 if (handle == NULL) {
305 log_err("fio_getaffinity: failed to get handle for pid %d\n",
312 * GetProcessGroupAffinity() seems to expect more than the natural
313 * alignment for a USHORT from the area pointed to by current_groups so
314 * arrange for maximum alignment by allocating via malloc()
316 current_groups = malloc(group_count * sizeof(USHORT));
317 if (!current_groups) {
318 log_err("fio_getaffinity: malloc failed\n");
321 if (!GetProcessGroupAffinity(handle, &group_count, current_groups)) {
322 log_err("%s: failed to get single group affinity for pid %d (%d)\n",
323 __func__, pid, GetLastError());
326 if (group_count > 1) {
327 log_err("%s: pid %d is associated with %d process groups\n",
328 __func__, pid, group_count);
331 if (!GetProcessAffinityMask(handle, &process_mask, &system_mask)) {
332 log_err("%s: GetProcessAffinityMask() failed for pid\n",
337 /* Convert group and group relative mask to full CPU mask */
338 online_groups = GetActiveProcessorGroupCount();
339 if (online_groups == 0) {
340 log_err("fio_getaffinity: error retrieving total processor groups\n");
347 dprint(FD_PROCESS, "current_groups=%d group_count=%d\n",
348 current_groups[0], group_count);
350 group_size = GetActiveProcessorCount(group);
351 if (group_size == 0) {
352 log_err("fio_getaffinity: error retrieving size of "
353 "processor group %d\n", group);
355 } else if (group >= current_groups[0] || group >= online_groups)
358 group_start_cpu += group_size;
363 if (group != current_groups[0]) {
364 log_err("fio_getaffinity: could not find processor group %d\n",
369 dprint(FD_PROCESS, "group_start_cpu=%d, group size=%u\n",
370 group_start_cpu, group_size);
371 if ((group_start_cpu + group_size) >= FIO_MAX_CPUS) {
372 log_err("fio_getaffinity failed: current CPU affinity (group "
373 "%d, group_start_cpu %d, group_size %d) extends "
374 "beyond mask's highest CPU (%d)\n", group,
375 group_start_cpu, group_size, FIO_MAX_CPUS);
379 fio_cpuset_init(mask);
380 cpu_to_row_offset(group_start_cpu, &row, &offset);
381 mask->row[row] = process_mask;
382 mask->row[row] <<= offset;
383 end = offset + group_size;
384 if (end > FIO_CPU_MASK_STRIDE) {
386 uint64_t needed_mask;
388 needed = FIO_CPU_MASK_STRIDE - end;
389 needed_mask = (uint64_t)-1 >> (FIO_CPU_MASK_STRIDE - needed);
391 mask->row[row] = process_mask;
392 mask->row[row] >>= needed;
393 mask->row[row] &= needed_mask;
401 free(current_groups);
406 void fio_cpu_clear(os_cpu_mask_t *mask, int cpu)
409 cpu_to_row_offset(cpu, &row, &offset);
411 mask->row[row] &= ~(1ULL << offset);
414 void fio_cpu_set(os_cpu_mask_t *mask, int cpu)
417 cpu_to_row_offset(cpu, &row, &offset);
419 mask->row[row] |= 1ULL << offset;
422 int fio_cpu_isset(os_cpu_mask_t *mask, int cpu)
425 cpu_to_row_offset(cpu, &row, &offset);
427 return (mask->row[row] & (1ULL << offset)) != 0;
430 int fio_cpu_count(os_cpu_mask_t *mask)
434 for (int i = 0; i < FIO_CPU_MASK_ROWS; i++)
435 count += hweight64(mask->row[i]);
440 int fio_cpuset_exit(os_cpu_mask_t *mask)
444 #endif /* CONFIG_WINDOWS_XP */