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Linux/include/linux/sched_clock.h

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Diff markup

Differences between /include/linux/sched_clock.h (Version linux-6.11-rc3) and /include/linux/sched_clock.h (Version linux-3.10.108)


  1 /* SPDX-License-Identifier: GPL-2.0-only */         1 
  2 /*                                                
  3  * sched_clock.h: support for extending counte    
  4  */                                               
  5 #ifndef LINUX_SCHED_CLOCK                         
  6 #define LINUX_SCHED_CLOCK                         
  7                                                   
  8 #include <linux/types.h>                          
  9                                                   
 10 #ifdef CONFIG_GENERIC_SCHED_CLOCK                 
 11 /**                                               
 12  * struct clock_read_data - data required to r    
 13  *                                                
 14  * @epoch_ns:           sched_clock() value at    
 15  * @epoch_cyc:          Clock cycle value at l    
 16  * @sched_clock_mask:   Bitmask for two's comp    
 17  *                      clocks.                   
 18  * @read_sched_clock:   Current clock source (    
 19  * @mult:               Multiplier for scaled     
 20  * @shift:              Shift value for scaled    
 21  *                                                
 22  * Care must be taken when updating this struc    
 23  * some very hot code paths. It occupies <=40     
 24  * with the seqcount used to synchronize acces    
 25  * a 64 byte cache line.                          
 26  */                                               
 27 struct clock_read_data {                          
 28         u64 epoch_ns;                             
 29         u64 epoch_cyc;                            
 30         u64 sched_clock_mask;                     
 31         u64 (*read_sched_clock)(void);            
 32         u32 mult;                                 
 33         u32 shift;                                
 34 };                                                
 35                                                   
 36 extern struct clock_read_data *sched_clock_rea    
 37 extern int sched_clock_read_retry(unsigned int    
 38                                                   
 39 extern void generic_sched_clock_init(void);       
 40                                                   
 41 extern void sched_clock_register(u64 (*read)(v    
 42                                  unsigned long    
 43 #else                                             
 44 static inline void generic_sched_clock_init(vo    
 45                                                   
 46 static inline void sched_clock_register(u64 (*    
 47                                         unsign    
 48 {                                                 
 49 }                                                 
 50 #endif                                            
 51                                                   
 52 #endif                                            
 53                                                   

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