Re: [EXTERNAL] [PATCH v2] examples/l3fwd: adjust Tx burst size based on Rx burst

["Tummala, Sivaprasad" <Sivaprasad.Tummala@amd.com>]

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[AMD Official Use Only - AMD Internal Distribution Only]

Hi Pavan,

Please find my response inline.

________________________________
From: Pavan Nikhilesh Bhagavatula <pbhagavatula@marvell.com>
Sent: Tuesday, June 10, 2025 7:59 PM
To: Tummala, Sivaprasad <Sivaprasad.Tummala@amd.com>; david.hunt@intel.com <david.hunt@intel.com>; anatoly.burakov@intel.com <anatoly.burakov@intel.com>; Jerin Jacob <jerinj@marvell.com>; radu.nicolau@intel.com <radu.nicolau@intel.com>; Akhil Goyal <gakhil@marvell.com>; cristian.dumitrescu@intel.com <cristian.dumitrescu@intel.com>; Yigit, Ferruh <Ferruh.Yigit@amd.com>; konstantin.ananyev@huawei.com <konstantin.ananyev@huawei.com>; mb@smartsharesystems.com <mb@smartsharesystems.com>
Cc: dev@dpdk.org <dev@dpdk.org>; haijie1@huawei.com <haijie1@huawei.com>; stable@dpdk.org <stable@dpdk.org>; Ande, Venkat Kumar <VenkatKumar.Ande@amd.com>; Dengdui Huang <huangdengdui@huawei.com>
Subject: Re: [EXTERNAL] [PATCH v2] examples/l3fwd: adjust Tx burst size based on Rx burst

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>>Previously, the TX burst size was fixed at 256, leading to performance
>>degradation in certain scenarios.
>>
>>This patch introduces logic to set the TX burst size to match the
>>configured RX burst size (--burst option, default 32, max 512)
>>for better efficiency.
>>
>>Fixes: d5c4897ecfb2 ("examples/l3fwd: add option to set Rx burst size")
>>Cc: haijie1@huawei.com
>>Cc: stable@dpdk.org
>>
>>Signed-off-by: Sivaprasad Tummala <sivaprasad.tummala@amd.com>
>>Tested-by: Venkat Kumar Ande <VenkatKumar.Ande@amd.com>
>>Tested-by: Dengdui Huang <huangdengdui@huawei.com>

>It would be good if the selected burst sizes of Rx and Tx are logged.
ACK

>On CN10K platform we see upto 5% improvement, and upto 30% improvement on CN9K.

>Tested-by: Pavan Nikhilesh <pbhagavatula@marvell.com>

>---
> examples/l3fwd/l3fwd.h        |  8 ++------
> examples/l3fwd/l3fwd_common.h | 11 +++++++----
> examples/l3fwd/main.c         |  2 ++
> 3 files changed, 11 insertions(+), 10 deletions(-)


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