probe_uring_read.bt

#!/usr/bin/bpftrace

usdt:$1:read_enter
{
	@start_read = nsecs;
}

kprobe:io_read
/@start_read/
{
	@start_read_kernel = nsecs;
	@total_to_kernel[comm] += (@start_read_kernel - @start_read);
	@counter_to_kernel[comm] = count();
	delete(@start_read);
}

kretprobe:io_read
/@start_read_kernel/
{
	@end_read_kernel = nsecs;
	@total_service[comm] += (@end_read_kernel - @start_read_kernel);
	@counter_service[comm] = count();
	delete(@start_read_kernel)
}

usdt:$1:read_exit
/@end_read_kernel/
{
	@total_to_user[comm] += (nsecs - @end_read_kernel);
	@counter_to_user[comm] = count();
	delete(@end_read_kernel);
}