Question

const struct sigevent *intHandler(void *arg, int id)
{
start_clock = ClockCycles();
//printf("start clock: %lld\n", start_clock);

return(&event);
}


int ConfigureISR()
{

// Get IO privilege
//
ThreadCtl( _NTO_TCTL_IO, 0 );


//
// Setup COID and event

chid = ChannelCreate( 0 );
SIGEV_INTR_INIT( &event);
interruptID = InterruptAttach(7, intHandler, NULL, 0, 0);
if (interruptID == -1)

{
        fprintf(stderr, "can't attach to IRQ\n");
        perror (NULL);
        exit (EXIT_FAILURE);
    }

InterruptWait(0, NULL);

    end_clock = ClockCycles();
   // printf("end clock: %lld\n", end_clock);

    //microseconds

InterruptLatency = (uint32) ((end_clock - start_clock)*1000000/(SYSPAGE_ENTRY(qtime)->cycles_per_sec));


printf("microseconds: %ld\n", InterruptLatency);
measurements[17] = InterruptLatency;


    return (EXIT_SUCCESS);
}

int main()
{
ConfigureISR();
// my socket code here to receive data from client.
}

我在c中为QNX操作系统创建了一个中断处理程序。我的任务：只要udp层上有数据，内核就应该调用这个中断处理程序。我正在计算上面代码中的中断延迟。 CLIENT正在发送数据，服务器（上面的代码）正在从客户端接收数据并发回响应。当它在udp层上接收数据时，上述代码不会每次都被中断。上面的错误可能是什么？有人可以帮助我吗？

创建中断处理程序

0 个答案: