unsigned long start_time, end_time, elapsed_time; start_time = arch_timer_read_counter(); // Code segment to be measured end_time = arch_timer_read_counter(); elapsed_time = end_time - start_time; pr_info("Elapsed time: lu\n", elapsed_time); return 0; } static void __exit my...
"arch_timer_read_counter"是一个用于读取处理器计时器计数值的函数。该函数的作用是返回一个表示当前计时器计数值的整数。通过读取计时器的计数值,我们可以了解到目前为止经过的时间间隔或计时器自启动以来所经过的时间。 第四部分:如何使用"arch_timer_read_counter"? 要使用"arch_timer_read_counter"函数,我们首...
static inline u64 arch_counter_get_cntpct(void) { u64 cnt; isb(); return arch_timer_reg_read_stable(cntpct_el0); cnt = arch_timer_reg_read_stable(cntpct_el0); arch_counter_enforce_ordering(cnt); return cnt; } static inline u64 arch_counter_get_cntvct(void) { u64 cnt; isb();...
returnarch_counter_get_cntvct(); } u64(*arch_timer_read_counter)(void)=arch_timer_read_zero; staticcycle_tarch_counter_read(structclocksource*cs) { returnarch_timer_read_counter(); returnarch_counter_get_cntvct(); } staticcycle_tarch_counter_read_cc(conststructcyclecounter*cc) ...
这7个timer 的"值"都来源自2个counter cntpct_el0,是Physical Count register; cntp,cnthp 基于cntpct_el0 cntvct_el0,也就是Virtual Count register;cntv,cnthv 基于cntvct_el0 其实cntvct_el0 和cntpct_el0也是有关系的,取决于hypervisor的配置: ...
int read_current_timer(unsigned long *timer_val){*timer_val = (unsigned long)arch_counter_get_cntpct();return 0;}#endifstatic struct clocksource clocksource_counter = {.name = "arch_sys_counter",.rating = 400,.read = arch_counter_read,...
Функция ExAllocateTimer Функция ExCancelTimer Функция ExConvertExclusiveToSharedLite Функция ExCreateCallback Функция ExCreatePool Функция ExDeleteLookasideListEx Функция ExDeleteNPagedLookasideList Функция ExDeletePagedLookasideList...
read_le() : archive_file_zlib.c read_line() : liolib.c read_lock() : spinlock.h read_lock_init : spinlock.h read_long_string() : llex.c read_map() : rmsgpack.c read_metadata_() : stream_decoder.c read_metadata_cuesheet_() : stream_decoder.c ...
# Input bind timer timeout. # Amount of seconds to wait until proceeding to the next bind. Default: 5, minimum: 1 # input_bind_timeout = 1 # If enabled, overrides the input binds with the remapped binds set for the current core. # input_remap_binds_enable = true # Maximum...
state.counter; } while (perf_sched_next_event(&sched)); return sched.state.unassigned; } EXPORT_SYMBOL_GPL(perf_assign_events); int x86_schedule_events(struct cpu_hw_events *cpuc, int n, int *assign) { struct event_constraint *c; unsigned long used_mask[BITS_TO_LONGS(X86_PMC_IDX_...