1 /* 2 * latencytop.h: Infrastructure for displaying latency 3 * 4 * (C) Copyright 2008 Intel Corporation 5 * Author: Arjan van de Ven <arjan@linux.intel.com> 6 * 7 */ 8 9 #ifndef _INCLUDE_GUARD_LATENCYTOP_H_ 10 #define _INCLUDE_GUARD_LATENCYTOP_H_ 11 12 #ifdef CONFIG_LATENCYTOP 13 14 #define LT_SAVECOUNT 32 15 #define LT_BACKTRACEDEPTH 12 16 17 struct latency_record { 18 unsigned long backtrace[LT_BACKTRACEDEPTH]; 19 unsigned int count; 20 unsigned long time; 21 unsigned long max; 22 }; 23 24 25 struct task_struct; 26 27 void account_scheduler_latency(struct task_struct *task, int usecs, int inter); 28 29 void clear_all_latency_tracing(struct task_struct *p); 30 31 #else 32 33 static inline void account_scheduler_latency(struct task_struct * task,int usecs,int inter)34account_scheduler_latency(struct task_struct *task, int usecs, int inter) 35 { 36 } 37 clear_all_latency_tracing(struct task_struct * p)38static inline void clear_all_latency_tracing(struct task_struct *p) 39 { 40 } 41 42 #endif 43 44 #endif 45