[dpdk-users] MEMPOOL contentions

[dpdk-users] MEMPOOL contentions

[Junguk Cho]

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.
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

Re: [dpdk-users] MEMPOOL contentions

[Wiles, Keith]

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

Re: [dpdk-users] MEMPOOL contentions

[Junguk Cho]

Hi, Keith.

Thank you for reply.

I reached those setup.
My question is when I run my app after these setup, how to get statistics?
In other words, where can I see some statistics like file or screen?


Thanks,
Junguk

2016-09-02 12:35 GMT-06:00 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
>
>