ceph/src/spdk/dpdk/examples/vm_power_manager/power_manager.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #ifndef POWER_MANAGER_H_
   6 #define POWER_MANAGER_H_
   7
   8 #ifdef __cplusplus
   9 extern "C" {
  10 #endif
  11 struct core_details {
  12         uint64_t last_branches;
  13         uint64_t last_branch_misses;
  14         uint16_t global_enabled_cpus;
  15         uint16_t oob_enabled;
  16         int msr_fd;
  17 };
  18
  19 struct core_info {
  20         uint16_t core_count;
  21         struct core_details *cd;
  22         float branch_ratio_threshold;
  23 };
  24
  25 #define BRANCH_RATIO_THRESHOLD 0.1
  26
  27 struct core_info *
  28 get_core_info(void);
  29
  30 int
  31 core_info_init(void);
  32
  33 #define RTE_LOGTYPE_POWER_MANAGER RTE_LOGTYPE_USER1
  34
  35 /**
  36  * Initialize power management.
  37  * Initializes resources and verifies the number of CPUs on the system.
  38  * Wraps librte_power int rte_power_init(unsigned lcore_id);
  39  *
  40  * @return
  41  *  - 0 on success.
  42  *  - Negative on error.
  43  */
  44 int power_manager_init(void);
  45
  46 /**
  47  * Exit power management. Must be called prior to exiting the application.
  48  *
  49  * @return
  50  *  - 0 on success.
  51  *  - Negative on error.
  52  */
  53 int power_manager_exit(void);
  54
  55 /**
  56  * Scale up the frequency of the cores specified in core_mask.
  57  * It is thread-safe.
  58  *
  59  * @param core_mask
  60  *  The uint64_t bit-mask of cores to change frequency.
  61  *
  62  * @return
  63  *  - 1 on success.
  64  *  - Negative on error.
  65  */
  66 int power_manager_scale_mask_up(uint64_t core_mask);
  67
  68 /**
  69  * Scale down the frequency of the cores specified in core_mask.
  70  * It is thread-safe.
  71  *
  72  * @param core_mask
  73  *  The uint64_t bit-mask of cores to change frequency.
  74  *
  75  * @return
  76  *  - 1 on success.
  77  *  - Negative on error.
  78  */
  79 int power_manager_scale_mask_down(uint64_t core_mask);
  80
  81 /**
  82  * Scale to the minimum frequency of the cores specified in core_mask.
  83  * It is thread-safe.
  84  *
  85  * @param core_mask
  86  *  The uint64_t bit-mask of cores to change frequency.
  87  *
  88  * @return
  89  *  - 1 on success.
  90  *  - Negative on error.
  91  */
  92 int power_manager_scale_mask_min(uint64_t core_mask);
  93
  94 /**
  95  * Scale to the maximum frequency of the cores specified in core_mask.
  96  * It is thread-safe.
  97  *
  98  * @param core_mask
  99  *  The uint64_t bit-mask of cores to change frequency.
 100  *
 101  * @return
 102  *  - 1 on success.
 103  *  - Negative on error.
 104  */
 105 int power_manager_scale_mask_max(uint64_t core_mask);
 106
 107 /**
 108  * Enable Turbo Boost on the cores specified in core_mask.
 109  * It is thread-safe.
 110  *
 111  * @param core_mask
 112  *  The uint64_t bit-mask of cores to change frequency.
 113  *
 114  * @return
 115  *  - 1 on success.
 116  *  - Negative on error.
 117  */
 118 int power_manager_enable_turbo_mask(uint64_t core_mask);
 119
 120 /**
 121  * Disable Turbo Boost on the cores specified in core_mask.
 122  * It is thread-safe.
 123  *
 124  * @param core_mask
 125  *  The uint64_t bit-mask of cores to change frequency.
 126  *
 127  * @return
 128  *  - 1 on success.
 129  *  - Negative on error.
 130  */
 131 int power_manager_disable_turbo_mask(uint64_t core_mask);
 132
 133 /**
 134  * Scale up frequency for the core specified by core_num.
 135  * It is thread-safe.
 136  *
 137  * @param core_num
 138  *  The core number to change frequency
 139  *
 140  * @return
 141  *  - 1 on success.
 142  *  - Negative on error.
 143  */
 144 int power_manager_scale_core_up(unsigned core_num);
 145
 146 /**
 147  * Scale down frequency for the core specified by core_num.
 148  * It is thread-safe.
 149  *
 150  * @param core_num
 151  *  The core number to change frequency
 152  *
 153  * @return
 154  *  - 1 on success.
 155  *  - 0 if frequency not changed.
 156  *  - Negative on error.
 157  */
 158 int power_manager_scale_core_down(unsigned core_num);
 159
 160 /**
 161  * Scale to minimum frequency for the core specified by core_num.
 162  * It is thread-safe.
 163  *
 164  * @param core_num
 165  *  The core number to change frequency
 166  *
 167  * @return
 168  *  - 1 on success.
 169  *  - 0 if frequency not changed.
 170  *  - Negative on error.
 171  */
 172 int power_manager_scale_core_min(unsigned core_num);
 173
 174 /**
 175  * Scale to maximum frequency for the core specified by core_num.
 176  * It is thread-safe.
 177  *
 178  * @param core_num
 179  *  The core number to change frequency
 180  *
 181  * @return
 182  *  - 1 on success.
 183  *  - 0 if frequency not changed.
 184  *  - Negative on error.
 185  */
 186 int power_manager_scale_core_max(unsigned core_num);
 187
 188 /**
 189  * Enable Turbo Boost for the core specified by core_num.
 190  * It is thread-safe.
 191  *
 192  * @param core_num
 193  *  The core number to boost
 194  *
 195  * @return
 196  *  - 1 on success.
 197  *  - Negative on error.
 198  */
 199 int power_manager_enable_turbo_core(unsigned int core_num);
 200
 201 /**
 202  * Disable Turbo Boost for the core specified by core_num.
 203  * It is thread-safe.
 204  *
 205  * @param core_num
 206  *  The core number to boost
 207  *
 208  * @return
 209  *  - 1 on success.
 210  *  - Negative on error.
 211  */
 212 int power_manager_disable_turbo_core(unsigned int core_num);
 213
 214 /**
 215  * Get the current freuency of the core specified by core_num
 216  *
 217  * @param core_num
 218  *  The core number to get the current frequency
 219  *
 220  * @return
 221  *  - 0  on error
 222  *  - >0 for current frequency.
 223  */
 224 uint32_t power_manager_get_current_frequency(unsigned core_num);
 225
 226 /**
 227  * Scale to medium frequency for the core specified by core_num.
 228  * It is thread-safe.
 229  *
 230  * @param core_num
 231  *  The core number to change frequency
 232  *
 233  * @return
 234  *  - 1 on success.
 235  *  - 0 if frequency not changed.
 236  *  - Negative on error.
 237  */
 238 int power_manager_scale_core_med(unsigned int core_num);
 239
 240 #ifdef __cplusplus
 241 }
 242 #endif
 243
 244
 245 #endif /* POWER_MANAGER_H_ */