Function report |
Source Code:kernel\events\core.c |
Create Date:2022-07-28 13:35:05 |
Last Modify:2022-05-20 07:50:19 | Copyright©Brick |
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Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:Read the performance event - simple non blocking version for now
Proto:static ssize_t __perf_read(struct perf_event *event, char __user *buf, size_t count)
Type:ssize_t
Parameter:
Type | Parameter | Name |
---|---|---|
struct perf_event * | event | |
char __user * | buf | |
size_t | count |
5014 | read_format = read_format |
5022 | If state == PERF_EVENT_STATE_ERROR Then Return 0 |
5028 | WARN_ON_ONCE(parent_ctx) |
5029 | If read_format & PERF_FORMAT_GROUP Then ret = perf_read_group(event, read_format, buf) |
5031 | Else ret = perf_read_one(event, read_format, buf) |
5034 | Return ret |
Name | Describe |
---|---|
perf_read |
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