From: Panu Matilainen <pmatilai@redhat.com>
To: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>,
"Iremonger, Bernard" <bernard.iremonger@intel.com>,
"dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v2] examples/vhost: reduce number of hugepages needed
Date: Fri, 11 Dec 2015 11:05:13 +0200 [thread overview]
Message-ID: <566A91C9.5040500@redhat.com> (raw)
In-Reply-To: <2601191342CEEE43887BDE71AB97725836AD25A2@irsmsx105.ger.corp.intel.com>
On 12/10/2015 04:50 PM, Ananyev, Konstantin wrote:
>
>
>> -----Original Message-----
>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Bernard Iremonger
>> Sent: Thursday, December 10, 2015 1:53 PM
>> To: dev@dpdk.org
>> Subject: [dpdk-dev] [PATCH v2] examples/vhost: reduce number of hugepages needed
>>
>> Change MAX_QUEUES from 512 to 128 to reduce the number of hugepages
>> required by the vhost-switch program.
>>
>> Changes in v2:
>> remove comment added before #define MAX_QUEUES in v1 patch.
>>
>> Signed-off-by: Bernard Iremonger <bernard.iremonger@intel.com>
>> Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
>
>
> Wasn't it increased a while ago, because someone complained that
> 128 queues might not be enough on FVL?
> From git log I can see that it was first increased from 128 to 256,
> then from 256 to 512.
> The reason mentioned - HW that has bigger number of queues.
> Isn't it not the case anymore?
> If yes, why?
>
> BTW, shouldn't it be then at least:
>
> +#ifndef MAX_QUEUES
> +#define MAX_QUEUES 128
> +#endif
>
> So people can just do -D MAX_QUEUES=X at build time if they like(need) to.
Being subject to constant changes back and forth suggests this really
should be a runtime tunable rather than build time constant.
- Panu -
next prev parent reply other threads:[~2015-12-11 9:05 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-10 12:19 [dpdk-dev] [PATCH] " Bernard Iremonger
2015-12-10 12:59 ` Yuanhan Liu
2015-12-10 13:26 ` Iremonger, Bernard
2015-12-10 13:34 ` Yuanhan Liu
2015-12-10 13:53 ` [dpdk-dev] [PATCH v2] " Bernard Iremonger
2015-12-10 14:50 ` Ananyev, Konstantin
2015-12-10 15:43 ` Iremonger, Bernard
2015-12-11 9:05 ` Panu Matilainen [this message]
2015-12-10 15:49 ` [dpdk-dev] [PATCH v3] " Bernard Iremonger
2015-12-10 16:32 ` Ananyev, Konstantin
2015-12-10 21:35 ` Thomas Monjalon
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