netdev - Re: [PATCH net-next 1/2] net: stmmac: Rework coalesce timer and fix multi-queue races

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Message-ID: <6bc7d443-845d-0d20-9902-bd15a6ca1c92@synopsys.com>
Date:   Mon, 3 Sep 2018 16:19:00 +0100
From:   Jose Abreu <Jose.Abreu@...opsys.com>
To:     Jerome Brunet <jbrunet@...libre.com>,
        Jose Abreu <Jose.Abreu@...opsys.com>, <netdev@...r.kernel.org>
CC:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        "David S. Miller" <davem@...emloft.net>,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>
Subject: Re: [PATCH net-next 1/2] net: stmmac: Rework coalesce timer and fix
 multi-queue races

On 03-09-2018 15:07, Jerome Brunet wrote:
>
> You had it on what you sent in the RFT, but this different.

Yeah, I had to fix the logic where tx queues != rx queues...

>
> Like with the RFT, the network breakdown we had is no longer reproduced.
> However this patch wreck the Rx throughput (680MBps -> 35MBps)

Damn, thats low. And I cant reproduce it here :/

Strange because I barely messed around with RX path...

Can you try attached patch in top of this one please?

>
> BTW, this patch and the RFT assume that 4ae0169fd1b3 ("net: stmmac: Do not keep
> rearming the coalesce timer in stmmac_xmit") is still applied but I believe
> David reverted the patch.
>
> If you still need this change, you should include it back in your changeset.

Yes I know it was reverted but -net was not merged into -next yet...

Thanks and Best Regards,
Jose Miguel Abreu

>
>> Thanks and Best Regards,
>> Jose Miguel Abreu
>> ---
>>  drivers/net/ethernet/stmicro/stmmac/common.h      |   4 +-
>>  drivers/net/ethernet/stmicro/stmmac/stmmac.h      |   7 +-
>>  drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 177 +++++++++++++++-------
>>  3 files changed, 126 insertions(+), 62 deletions(-)
>


View attachment "fixup.patch" of type "text/x-patch" (669 bytes)