One more point, if you're not doing this already: Allocate 2^N-1 mbufs, not
2^N. According to the code and comments: "The optimum size (in terms of
memory usage) for a mempool is when n is a power of two minus one: n = (2^q
- 1)."
The reason: rte_mempool_create(... n ...) invokes rte_ring_create(.
On 09/19/2013 11:43 PM, Venkatesan, Venky wrote:
> Dmitry,
> One other question - what version of DPDK are you doing on?
> -Venky
>
It's DPDK-1.3.1-7 downloaded from intel.com. Should I try upgrading?
On 09/19/2013 11:39 PM, Robert Sanford wrote:
> Hi Dmitry,
>
> The biggest drop-off seems to be from size 128K to 256K. Are you using
> 1GB huge pages already (rather than 2MB)?
>
> I would think that it would not use over 1GB until you ask for 512K
> mbufs or more.
>
Hi Robert,
Yes, I've been
It might be interesting to see that start/end address of the 256K-item (256
* 1024 * 2240 = 560 MB) mbuf memory pool. Maybe it's the first size that
straddles two 1GB pages.
Perhaps you should try a tool that reports cache misses, TLB misses, and
related statistics. I don't know much about this ar
4 matches
Mail list logo
