[rabbitmq-discuss] What does the "SUMMARY_EVERY_US" mean in rabbitmq-c?

Wed Jul 24 03:57:06 BST 2013

The definition of SUMMARY_EVERY_US implies that information (messages
received and the rate) will be printed every 100000 microseconds (US ==
microseconds).

Brett

On Wed, Jul 24, 2013 at 1:31 PM, Hugo <luhao.whu at gmail.com> wrote:

> Hey, there
>
> I am using rabbitmq-c for some applications. I got those code from the
> amqp_consumer.c, and the filed "next_summary_time " seemed to confuse me.
> What does the if
>
> clause (in bold) do here?
>
> Many thanks!
>
>
>
>> ......
>
> #define SUMMARY_EVERY_US 100000
>
>  ......
>
> uint64_t next_summary_time = start_time + SUMMARY_EVERY_US;
>> uint64_t now = now_microseconds();
>>     *  **if (now > next_summary_time) {*
>>         int countOverInterval = received - previous_received;
>>         double intervalRate = countOverInterval / ((now -
>> previous_report_time) / 1000000.0);
>>         printf("%d ms: Received %d - %d since last report (%d Hz)\n",
>>            (int)(now - start_time) / 1000, received, countOverInterval,
>> (int) intervalRate);
>>
>>         previous_received = received;
>>         previous_report_time = now;
>>         next_summary_time += SUMMARY_EVERY_US;
>>       }
>>
>>       amqp_maybe_release_buffers(conn);
>> ......
>
>
> Hugo.
>
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