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65 #ifndef _RTE_CYCLES_H_
66 #define _RTE_CYCLES_H_
71 * Simple Time Reference Functions (Cycles and HPET).
80 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
81 /** Global switch to use VMWARE mapping of TSC instead of RDTSC */
82 extern int rte_cycles_vmware_tsc_map;
83 #include <rte_branch_prediction.h>
88 * Read the TSC register.
91 * The TSC for this lcore.
93 static inline uint64_t
104 #ifdef RTE_LIBRTE_EAL_VMWARE_TSC_MAP_SUPPORT
105 if (unlikely(rte_cycles_vmware_tsc_map)) {
106 /* ecx = 0x10000 corresponds to the physical TSC for VMware */
107 asm volatile("rdpmc" :
115 asm volatile("rdtsc" :
122 * Return the number of HPET cycles since boot
124 * This counter is global for all execution units. The number of
125 * cycles in one second can be retrived using rte_get_hpet_hz().
128 * the number of cycles
131 rte_get_hpet_cycles(void);
134 * Get the number of cycles in one second.
137 * The number of cycles in one second.
140 rte_get_hpet_hz(void);
143 * Wait at least us microseconds.
146 * The number of microseconds to wait.
149 rte_delay_us(unsigned us);
152 * Wait at least ms milliseconds.
155 * The number of milliseconds to wait.
158 rte_delay_ms(unsigned ms)
160 rte_delay_us(ms * 1000);
167 #endif /* _RTE_CYCLES_H_ */