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Date:      Fri, 21 Oct 2022 14:45:37 -0400
From:      mike tancsa <mike@sentex.net>
To:        Navdeep Parhar <nparhar@gmail.com>, Freebsd performance <freebsd-performance@freebsd.org>
Subject:   Re: Chelsio Forwarding performance and RELENG_13 vs RELENG_12
Message-ID:  <39ca9375-e742-618e-5020-dda5fa24ac0a@sentex.net>
In-Reply-To: <8166abfe-a796-2cf0-ade2-de08df8eecd2@gmail.com>
References:  <7b86e3fe-62e4-7b3e-f4bf-30e4894db9db@sentex.net> <92cdf4b8-2209-ec44-8151-a59b9e8f1504@gmail.com> <b741dd17-f6eb-66c3-82f6-52b87475704f@sentex.net> <fa98a400-75b4-6453-0b40-ae098ac3ab59@gmail.com> <ceff6a91-929d-a3f9-e99e-03952b125ae2@sentex.net> <8166abfe-a796-2cf0-ade2-de08df8eecd2@gmail.com>

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On 10/21/2022 2:30 PM, Navdeep Parhar wrote:
> On 10/21/22 11:15 AM, mike tancsa wrote:
>> On 10/21/2022 2:13 PM, Navdeep Parhar wrote:
>>>
>>>>> hw.cxgbe.ntxq=4
>>>>> hw.cxgbe.nrxq=4
>>>>>
>>>> Thanks Navdeep!
>>>>
>>>> Unfortunately, still the odd dropped packet :(
>>>
>>> Can you try increasing the size of the queues?
>>>
>>> hw.cxgbe.qsize_txq=2048
>>> hw.cxgbe.qsize_rxq=2048
>>>
>>> The stats show that you are using MTU 1500.  If you were using MTU 
>>> 9000 I'd also have suggested setting largest_rx_cluster to 4K.
>>>
>>> hw.cxgbe.largest_rx_cluster=4096
>>>
>> Thanks again, just 1500 MTU.  Shall I keep nt and nrxq at 4 still ?
>
> Yes, I think 4 queues are enough for 10G.
>
Sadly, no luck. Still about the same rate of overflows :(

dev.cxl.0.stats.rx_trunc3: 0
dev.cxl.0.stats.rx_trunc2: 0
dev.cxl.0.stats.rx_trunc1: 0
dev.cxl.0.stats.rx_trunc0: 5
dev.cxl.0.stats.rx_ovflow3: 0
dev.cxl.0.stats.rx_ovflow2: 0
dev.cxl.0.stats.rx_ovflow1: 0
dev.cxl.0.stats.rx_ovflow0: 61
dev.cxl.0.stats.rx_ppp7: 0
dev.cxl.0.stats.rx_ppp6: 0
dev.cxl.0.stats.rx_ppp5: 0
dev.cxl.0.stats.rx_ppp4: 0
dev.cxl.0.stats.rx_ppp3: 0
dev.cxl.0.stats.rx_ppp2: 0
dev.cxl.0.stats.rx_ppp1: 0
dev.cxl.0.stats.rx_ppp0: 0
dev.cxl.0.stats.rx_pause: 0
dev.cxl.0.stats.rx_frames_1519_max: 0
dev.cxl.0.stats.rx_frames_1024_1518: 25966401
dev.cxl.0.stats.rx_frames_512_1023: 1569927
dev.cxl.0.stats.rx_frames_256_511: 1856460
dev.cxl.0.stats.rx_frames_128_255: 2718106
dev.cxl.0.stats.rx_frames_65_127: 4548626
dev.cxl.0.stats.rx_frames_64: 3044300
dev.cxl.0.stats.rx_runt: 0
dev.cxl.0.stats.rx_symbol_err: 0
dev.cxl.0.stats.rx_len_err: 0
dev.cxl.0.stats.rx_fcs_err: 0
dev.cxl.0.stats.rx_jabber: 0
dev.cxl.0.stats.rx_too_long: 0
dev.cxl.0.stats.rx_ucast_frames: 39618919
dev.cxl.0.stats.rx_mcast_frames: 36716
dev.cxl.0.stats.rx_bcast_frames: 48219
dev.cxl.0.stats.rx_frames: 39703866
dev.cxl.0.stats.rx_octets: 39678756369
dev.cxl.0.stats.tx_ppp7: 0



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