Re: [dpdk-users] MEMPOOL contentions

["Wiles, Keith" <keith.wiles@intel.com>]

Regards,
Keith

> On Sep 2, 2016, at 1:27 PM, Junguk Cho <jmanbal@gmail.com> wrote:
> 
> Hi,
> 
> In my setup, I created one mempool which is shared with 5 rings.
> So, I want to know statistics of contentions between 5 rings like taking
> time to get one mbuf.
> In the manual, there are some options like CONFIG_RTE_LIBRTE_MEMPOOL_DEBUG.

Add the option to your config file uses in the build of DPDK and set the value to ‘y’ instead of ’n’.

Example: edit or copy say defconfig_x86_64-native-linuxapp-gcc and add something like this;

CONFIG_RTE_LIBRTE_MEMPOOL_DEBUG=y

Then rebuild DPDK using something like ‘make install T=x86_64-native-linux-gcc -j'

> However, I don't know how to use it.
> 
> Is there any reference?
> 
> Intuitively, as the number of rings are increase, I think the contention
> happened frequently.
> So, to avoid this, is increasing CONFIG_RTE_MEMPOOL_CACHE_MAX_SIZE one
> solution?
> 
> 
> Thanks,
> Junguk