diff options
Diffstat (limited to 'os/os-windows-7.h')
| -rw-r--r-- | os/os-windows-7.h | 367 |
1 files changed, 367 insertions, 0 deletions
diff --git a/os/os-windows-7.h b/os/os-windows-7.h new file mode 100644 index 00000000..f5ddb8ef --- /dev/null +++ b/os/os-windows-7.h @@ -0,0 +1,367 @@ +#define FIO_MAX_CPUS 512 /* From Hyper-V 2016's max logical processors */ +#define FIO_CPU_MASK_STRIDE 64 +#define FIO_CPU_MASK_ROWS (FIO_MAX_CPUS / FIO_CPU_MASK_STRIDE) + +typedef struct { + uint64_t row[FIO_CPU_MASK_ROWS]; +} os_cpu_mask_t; + +#define FIO_HAVE_CPU_ONLINE_SYSCONF +/* Return all processors regardless of processor group */ +static inline unsigned int cpus_online(void) +{ + return GetMaximumProcessorCount(ALL_PROCESSOR_GROUPS); +} + +static inline void print_mask(os_cpu_mask_t *cpumask) +{ + for (int i = 0; i < FIO_CPU_MASK_ROWS; i++) + dprint(FD_PROCESS, "cpumask[%d]=%lu\n", i, cpumask->row[i]); +} + +/* Return the index of the least significant set CPU in cpumask or -1 if no + * CPUs are set */ +static inline int first_set_cpu(os_cpu_mask_t *cpumask) +{ + int cpus_offset, mask_first_cpu, row; + + cpus_offset = 0; + row = 0; + mask_first_cpu = -1; + while (mask_first_cpu < 0 && row < FIO_CPU_MASK_ROWS) { + int row_first_cpu; + + row_first_cpu = __builtin_ffsll(cpumask->row[row]) - 1; + dprint(FD_PROCESS, "row_first_cpu=%d cpumask->row[%d]=%lu\n", + row_first_cpu, row, cpumask->row[row]); + if (row_first_cpu > -1) { + mask_first_cpu = cpus_offset + row_first_cpu; + dprint(FD_PROCESS, "first set cpu in mask is at index %d\n", + mask_first_cpu); + } else { + cpus_offset += FIO_CPU_MASK_STRIDE; + row++; + } + } + + return mask_first_cpu; +} + +/* Return the index of the most significant set CPU in cpumask or -1 if no + * CPUs are set */ +static inline int last_set_cpu(os_cpu_mask_t *cpumask) +{ + int cpus_offset, mask_last_cpu, row; + + cpus_offset = (FIO_CPU_MASK_ROWS - 1) * FIO_CPU_MASK_STRIDE; + row = FIO_CPU_MASK_ROWS - 1; + mask_last_cpu = -1; + while (mask_last_cpu < 0 && row >= 0) { + int row_last_cpu; + + if (cpumask->row[row] == 0) + row_last_cpu = -1; + else { + uint64_t tmp = cpumask->row[row]; + + row_last_cpu = 0; + while (tmp >>= 1) + row_last_cpu++; + } + + dprint(FD_PROCESS, "row_last_cpu=%d cpumask->row[%d]=%lu\n", + row_last_cpu, row, cpumask->row[row]); + if (row_last_cpu > -1) { + mask_last_cpu = cpus_offset + row_last_cpu; + dprint(FD_PROCESS, "last set cpu in mask is at index %d\n", + mask_last_cpu); + } else { + cpus_offset -= FIO_CPU_MASK_STRIDE; + row--; + } + } + + return mask_last_cpu; +} + +static inline int mask_to_group_mask(os_cpu_mask_t *cpumask, int *processor_group, uint64_t *affinity_mask) +{ + WORD online_groups, group, group_size; + bool found; + int cpus_offset, search_cpu, last_cpu, bit_offset, row, end; + uint64_t group_cpumask; + + search_cpu = first_set_cpu(cpumask); + if (search_cpu < 0) { + log_info("CPU mask doesn't set any CPUs\n"); + return 1; + } + + /* Find processor group first set CPU applies to */ + online_groups = GetActiveProcessorGroupCount(); + group = 0; + found = false; + cpus_offset = 0; + group_size = 0; + while (!found && group < online_groups) { + group_size = GetMaximumProcessorCount(group); + dprint(FD_PROCESS, "group=%d group_start=%d group_size=%u search_cpu=%d\n", + group, cpus_offset, group_size, search_cpu); + if (cpus_offset + group_size > search_cpu) + found = true; + else { + cpus_offset += group_size; + group++; + } + } + + if (!found) { + log_err("CPU mask contains processor beyond last active processor index (%d)\n", + cpus_offset - 1); + print_mask(cpumask); + return 1; + } + + /* Check all the CPUs in the mask apply to ONLY that processor group */ + last_cpu = last_set_cpu(cpumask); + if (last_cpu > (cpus_offset + group_size - 1)) { + log_info("CPU mask cannot bind CPUs (e.g. %d, %d) that are " + "in different processor groups\n", search_cpu, + last_cpu); + print_mask(cpumask); + return 1; + } + + /* Extract the current processor group mask from the cpumask */ + row = cpus_offset / FIO_CPU_MASK_STRIDE; + bit_offset = cpus_offset % FIO_CPU_MASK_STRIDE; + group_cpumask = cpumask->row[row] >> bit_offset; + end = bit_offset + group_size; + if (end > FIO_CPU_MASK_STRIDE && (row + 1 < FIO_CPU_MASK_ROWS)) { + /* Some of the next row needs to be part of the mask */ + int needed, needed_shift, needed_mask_shift; + uint64_t needed_mask; + + needed = end - FIO_CPU_MASK_STRIDE; + needed_shift = FIO_CPU_MASK_STRIDE - bit_offset; + needed_mask_shift = FIO_CPU_MASK_STRIDE - needed; + needed_mask = (uint64_t)-1 >> needed_mask_shift; + 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); + group_cpumask |= (cpumask->row[row + 1] & needed_mask) << needed_shift; + } + group_cpumask &= (uint64_t)-1 >> (FIO_CPU_MASK_STRIDE - group_size); + + /* Return group and mask */ + dprint(FD_PROCESS, "Returning group=%d group_mask=%lu\n", group, group_cpumask); + *processor_group = group; + *affinity_mask = group_cpumask; + + return 0; +} + +static inline int fio_setaffinity(int pid, os_cpu_mask_t cpumask) +{ + HANDLE handle = NULL; + int group, ret; + uint64_t group_mask = 0; + GROUP_AFFINITY new_group_affinity; + + ret = -1; + + if (mask_to_group_mask(&cpumask, &group, &group_mask) != 0) + goto err; + + handle = OpenThread(THREAD_QUERY_INFORMATION | THREAD_SET_INFORMATION, + TRUE, pid); + if (handle == NULL) { + log_err("fio_setaffinity: failed to get handle for pid %d\n", pid); + goto err; + } + + /* Set group and mask. + * Note: if the GROUP_AFFINITY struct's Reserved members are not + * initialised to 0 then SetThreadGroupAffinity will fail with + * GetLastError() set to ERROR_INVALID_PARAMETER */ + new_group_affinity.Mask = (KAFFINITY) group_mask; + new_group_affinity.Group = group; + new_group_affinity.Reserved[0] = 0; + new_group_affinity.Reserved[1] = 0; + new_group_affinity.Reserved[2] = 0; + if (SetThreadGroupAffinity(handle, &new_group_affinity, NULL) != 0) + ret = 0; + else { + log_err("fio_setaffinity: failed to set thread affinity " + "(pid %d, group %d, mask %" PRIx64 ", " + "GetLastError=%d)\n", pid, group, group_mask, + GetLastError()); + goto err; + } + +err: + if (handle) + CloseHandle(handle); + return ret; +} + +static inline void cpu_to_row_offset(int cpu, int *row, int *offset) +{ + *row = cpu / FIO_CPU_MASK_STRIDE; + *offset = cpu << FIO_CPU_MASK_STRIDE * *row; +} + +static inline int fio_cpuset_init(os_cpu_mask_t *mask) +{ + for (int i = 0; i < FIO_CPU_MASK_ROWS; i++) + mask->row[i] = 0; + return 0; +} + +/* + * fio_getaffinity() should not be called once a fio_setaffinity() call has + * been made because fio_setaffinity() may put the process into multiple + * processor groups + */ +static inline int fio_getaffinity(int pid, os_cpu_mask_t *mask) +{ + int ret; + int row, offset, end, group, group_size, group_start_cpu; + DWORD_PTR process_mask, system_mask; + HANDLE handle; + PUSHORT current_groups; + USHORT group_count; + WORD online_groups; + + ret = -1; + current_groups = NULL; + handle = OpenProcess(PROCESS_QUERY_INFORMATION, TRUE, pid); + if (handle == NULL) { + log_err("fio_getaffinity: failed to get handle for pid %d\n", + pid); + goto err; + } + + group_count = 1; + /* + * GetProcessGroupAffinity() seems to expect more than the natural + * alignment for a USHORT from the area pointed to by current_groups so + * arrange for maximum alignment by allocating via malloc() + */ + current_groups = malloc(sizeof(USHORT)); + if (!current_groups) { + log_err("fio_getaffinity: malloc failed\n"); + goto err; + } + if (GetProcessGroupAffinity(handle, &group_count, current_groups) == 0) { + /* NB: we also fail here if we are a multi-group process */ + log_err("fio_getaffinity: failed to get single group affinity for pid %d\n", pid); + goto err; + } + GetProcessAffinityMask(handle, &process_mask, &system_mask); + + /* Convert group and group relative mask to full CPU mask */ + online_groups = GetActiveProcessorGroupCount(); + if (online_groups == 0) { + log_err("fio_getaffinity: error retrieving total processor groups\n"); + goto err; + } + + group = 0; + group_start_cpu = 0; + group_size = 0; + dprint(FD_PROCESS, "current_groups=%d group_count=%d\n", + current_groups[0], group_count); + while (true) { + group_size = GetMaximumProcessorCount(group); + if (group_size == 0) { + log_err("fio_getaffinity: error retrieving size of " + "processor group %d\n", group); + goto err; + } else if (group >= current_groups[0] || group >= online_groups) + break; + else { + group_start_cpu += group_size; + group++; + } + } + + if (group != current_groups[0]) { + log_err("fio_getaffinity: could not find processor group %d\n", + current_groups[0]); + goto err; + } + + dprint(FD_PROCESS, "group_start_cpu=%d, group size=%u\n", + group_start_cpu, group_size); + if ((group_start_cpu + group_size) >= FIO_MAX_CPUS) { + log_err("fio_getaffinity failed: current CPU affinity (group " + "%d, group_start_cpu %d, group_size %d) extends " + "beyond mask's highest CPU (%d)\n", group, + group_start_cpu, group_size, FIO_MAX_CPUS); + goto err; + } + + fio_cpuset_init(mask); + cpu_to_row_offset(group_start_cpu, &row, &offset); + mask->row[row] = process_mask; + mask->row[row] <<= offset; + end = offset + group_size; + if (end > FIO_CPU_MASK_STRIDE) { + int needed; + uint64_t needed_mask; + + needed = FIO_CPU_MASK_STRIDE - end; + needed_mask = (uint64_t)-1 >> (FIO_CPU_MASK_STRIDE - needed); + row++; + mask->row[row] = process_mask; + mask->row[row] >>= needed; + mask->row[row] &= needed_mask; + } + ret = 0; + +err: + if (handle) + CloseHandle(handle); + if (current_groups) + free(current_groups); + + return ret; +} + +static inline void fio_cpu_clear(os_cpu_mask_t *mask, int cpu) +{ + int row, offset; + cpu_to_row_offset(cpu, &row, &offset); + + mask->row[row] &= ~(1ULL << offset); +} + +static inline void fio_cpu_set(os_cpu_mask_t *mask, int cpu) +{ + int row, offset; + cpu_to_row_offset(cpu, &row, &offset); + + mask->row[row] |= 1ULL << offset; +} + +static inline int fio_cpu_isset(os_cpu_mask_t *mask, int cpu) +{ + int row, offset; + cpu_to_row_offset(cpu, &row, &offset); + + return (mask->row[row] & (1ULL << offset)) != 0; +} + +static inline int fio_cpu_count(os_cpu_mask_t *mask) +{ + int count = 0; + + for (int i = 0; i < FIO_CPU_MASK_ROWS; i++) + count += hweight64(mask->row[i]); + + return count; +} + +static inline int fio_cpuset_exit(os_cpu_mask_t *mask) +{ + return 0; +} |