From: Yunsheng Lin <linyunsheng@huawei.com>
To: Denis Kirjanov <kda@linux-powerpc.org>
Cc: <davem@davemloft.net>, <kuba@kernel.org>,
<alexander.duyck@gmail.com>, <linux@armlinux.org.uk>,
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Subject: Re: [PATCH rfc v4 4/4] net: hns3: support skb's frag page recycling based on page pool
Date: Wed, 14 Jul 2021 14:13:42 +0800 [thread overview]
Message-ID: <61d984ae-bfdd-3552-ca87-8e099aae5427@huawei.com> (raw)
In-Reply-To: <CAOJe8K33OM0_FpMtE_iDqRHYNGoKrZyBaoe6TiSHumcAoMsFnQ@mail.gmail.com>
On 2021/7/13 19:42, Denis Kirjanov wrote:
> On 7/13/21, Yunsheng Lin <linyunsheng@huawei.com> wrote:
>> This patch adds skb's frag page recycling support based on
>> the elevated refcnt support in page pool.
>>
>> The performance improves above 10~20% with IOMMU disabled.
>> The performance improves about 200% when IOMMU is enabled
>> and iperf server shares the same cpu with irq/NAPI.
>
> Could you share workload details?
The testcase is simple, using iperf TCP with only one thread.
The the iperf server CPU and NAPI softirq CPU is pinned to the
same CPU, the performance improves from 14Gbit to 33Gbit when
SMMU is in strict mode, so the above state is not accurate, it
should be "improves to about 200% when IOMMU is in strict mode"
>
>>
prev parent reply other threads:[~2021-07-14 6:13 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-13 9:24 [PATCH rfc v4 0/4] add frag page support in page pool Yunsheng Lin
2021-07-13 9:24 ` [PATCH rfc v4 1/4] page_pool: keep pp info as long as page pool owns the page Yunsheng Lin
2021-07-13 11:49 ` Ilias Apalodimas
2021-07-13 9:24 ` [PATCH rfc v4 2/4] page_pool: add interface to manipulate bias in page pool Yunsheng Lin
2021-07-13 18:41 ` Alexander Duyck
2021-07-14 6:24 ` Yunsheng Lin
2021-07-13 9:24 ` [PATCH rfc v4 3/4] page_pool: add frag page recycling support " Yunsheng Lin
2021-07-13 9:24 ` [PATCH rfc v4 4/4] net: hns3: support skb's frag page recycling based on " Yunsheng Lin
2021-07-13 11:42 ` Denis Kirjanov
2021-07-14 6:13 ` Yunsheng Lin [this message]
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