[Click] Queue Memory Allocation: vmalloc or kmalloc

Latency Buster latencybuster at gmail.com
Thu Jul 1 16:42:05 EDT 2010


Thanks.. The 'problem' is that I am not able to find out whether the
queue  element is storing the packets via vmalloc or kmalloc. I
observed that after 700,000 packets (for my system), y the drain rate
of the queue is decreasing rapidly under constant service rate...

Also, do I need to use ThreadSafeQueue for a multicore system? There
is only one producer pushing into the queue and only one consumer..
But both the producer and consumer elements have been mapped to
different cores.

On Thu, Jul 1, 2010 at 4:00 PM,  <rchertov at cs.ucsb.edu> wrote:
> Not sure on the largest size array that you can allocate in Click, but if
> the Queue element complains about the size, you should be able to just link
> the packets back to back using "next" defined in the Packet class.  That
> will require making a custom element, but it should do the trick.
>
> Roman
>
> On 12:44 pm 07/01/10 Latency Buster <latencybuster at gmail.com> wrote:
>> I have a machine with 32GB Ram... I am testing a scenario to find out
>> how long a burst can click handle based on varying service rate. If I
>> make the incoming queue length = 1.5 million packets, will click
>> allocate the memory using kmalloc or vmalloc? Since I have a machine
>> with large ram (32GB), I was thinking of allocating 2GB for packet
>> queues. Is that feasible with the current version of Click?
>>
>> Thanks,
>> _______________________________________________
>> click mailing list
>> click at amsterdam.lcs.mit.edu
>> https://amsterdam.lcs.mit.edu/mailman/listinfo/click
>
>



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