函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\ring_buffer.c Create Date:2022-07-27 12:59:49
Last Modify:2020-03-17 19:30:04 Copyright©Brick
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函数名称：rb_update_write_stamp

函数原型：static __always_inline void rb_update_write_stamp(struct ring_buffer_per_cpu *cpu_buffer, struct ring_buffer_event *event)

返回类型：void

参数：

类型参数名称
struct ring_buffer_per_cpu *cpu_buffer
struct ring_buffer_event *event
2584  如果rb_event_is_commit(cpu_buffer, event)则
2589  如果非rb_event_index(event)则write_stamp等于 page time stamp
2592  否则如果type_len恒等于RINGBUF_TYPE_TIME_EXTEND则
2593  delta等于g_buffer_event_time_stamp - return the event's extended timestamp*@event: the event to get the timestamp of* Returns the extended timestamp associated with a data event
2594  write_stamp加等于delta
2595  否则如果type_len恒等于RINGBUF_TYPE_TIME_STAMP则
2596  delta等于g_buffer_event_time_stamp - return the event's extended timestamp*@event: the event to get the timestamp of* Returns the extended timestamp associated with a data event
2597  write_stamp等于delta
2598  否则write_stamp加等于time_delta
调用者
名称描述
rb_commit
ring_buffer_discard_commitg_buffer_commit_discard - discard an event that has not been committed*@buffer: the ring buffer*@event: non committed event to discard* Sometimes an event that is in the ring buffer needs to be ignored