From: David Miller <davem@davemloft.net>
To: mcroce@linux.microsoft.com
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-riscv@lists.infradead.org, peppe.cavallaro@st.com,
alexandre.torgue@foss.st.com, kuba@kernel.org,
palmer@dabbelt.com, paul.walmsley@sifive.com,
drew@beagleboard.org, kernel@esmil.dk
Subject: Re: [PATCH net-next] stmmac: align RX buffers
Date: Mon, 14 Jun 2021 12:51:11 -0700 (PDT) [thread overview]
Message-ID: <20210614.125111.1519954686951337716.davem@davemloft.net> (raw)
In-Reply-To: <20210614022504.24458-1-mcroce@linux.microsoft.com>
But thois means the ethernet header will be misaliugned and this will kill performance on some cpus as misaligned accessed
are resolved wioth a trap handler.
Even on cpus that don't trap, the access will be slower.
Thanks.
WARNING: multiple messages have this Message-ID (diff)
From: David Miller <davem@davemloft.net>
To: mcroce@linux.microsoft.com
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-riscv@lists.infradead.org, peppe.cavallaro@st.com,
alexandre.torgue@foss.st.com, kuba@kernel.org,
palmer@dabbelt.com, paul.walmsley@sifive.com,
drew@beagleboard.org, kernel@esmil.dk
Subject: Re: [PATCH net-next] stmmac: align RX buffers
Date: Mon, 14 Jun 2021 12:51:11 -0700 (PDT) [thread overview]
Message-ID: <20210614.125111.1519954686951337716.davem@davemloft.net> (raw)
In-Reply-To: <20210614022504.24458-1-mcroce@linux.microsoft.com>
But thois means the ethernet header will be misaliugned and this will kill performance on some cpus as misaligned accessed
are resolved wioth a trap handler.
Even on cpus that don't trap, the access will be slower.
Thanks.
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next prev parent reply other threads:[~2021-06-14 19:51 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-14 2:25 [PATCH net-next] stmmac: align RX buffers Matteo Croce
2021-06-14 2:25 ` Matteo Croce
2021-06-14 19:51 ` David Miller [this message]
2021-06-14 19:51 ` David Miller
2021-06-14 23:21 ` Matteo Croce
2021-06-14 23:21 ` Matteo Croce
2021-06-15 17:28 ` David Miller
2021-06-15 17:28 ` David Miller
2021-06-15 17:30 ` patchwork-bot+netdevbpf
2021-06-15 17:30 ` patchwork-bot+netdevbpf
2021-08-10 19:07 ` Marc Zyngier
2021-08-10 19:07 ` Marc Zyngier
2021-08-11 10:28 ` Thierry Reding
2021-08-11 10:28 ` Thierry Reding
2021-08-11 12:53 ` Eric Dumazet
2021-08-11 12:53 ` Eric Dumazet
2021-08-11 14:16 ` Marc Zyngier
2021-08-11 14:16 ` Marc Zyngier
2021-08-12 8:48 ` Eric Dumazet
2021-08-12 8:48 ` Eric Dumazet
2021-08-12 10:18 ` Matteo Croce
2021-08-12 10:18 ` Matteo Croce
2021-08-12 11:05 ` Marc Zyngier
2021-08-12 11:05 ` Marc Zyngier
2021-08-12 11:18 ` Matteo Croce
2021-08-12 11:18 ` Matteo Croce
2021-08-19 16:29 ` Marc Zyngier
2021-08-19 16:29 ` Marc Zyngier
2021-08-20 10:37 ` Matteo Croce
2021-08-20 10:37 ` Matteo Croce
2021-08-20 16:26 ` Marc Zyngier
2021-08-20 16:26 ` Marc Zyngier
2021-08-20 16:38 ` Matteo Croce
2021-08-20 16:38 ` Matteo Croce
2021-08-20 17:09 ` Marc Zyngier
2021-08-20 17:09 ` Marc Zyngier
2021-08-20 17:14 ` Matteo Croce
2021-08-20 17:14 ` Matteo Croce
2021-08-20 17:24 ` Marc Zyngier
2021-08-20 17:24 ` Marc Zyngier
2021-08-20 17:35 ` Matteo Croce
2021-08-20 17:35 ` Matteo Croce
2021-08-20 17:51 ` Marc Zyngier
2021-08-20 17:51 ` Marc Zyngier
2021-08-20 17:56 ` Matteo Croce
2021-08-20 17:56 ` Matteo Croce
2021-08-20 18:05 ` Matteo Croce
2021-08-20 18:05 ` Matteo Croce
2021-08-20 18:14 ` Marc Zyngier
2021-08-20 18:14 ` Marc Zyngier
2021-08-20 18:09 ` Marc Zyngier
2021-08-20 18:09 ` Marc Zyngier
2021-08-20 18:14 ` Matteo Croce
2021-08-20 18:14 ` Matteo Croce
2021-08-20 18:41 ` Marc Zyngier
2021-08-20 18:41 ` Marc Zyngier
2021-08-16 15:12 ` Jakub Kicinski
2021-08-16 15:12 ` Jakub Kicinski
2021-08-17 0:01 ` Matteo Croce
2021-08-17 0:01 ` Matteo Croce
2021-08-19 15:26 ` Marc Zyngier
2021-08-19 15:26 ` Marc Zyngier
2021-08-11 10:41 ` Thierry Reding
2021-08-11 10:41 ` Thierry Reding
2021-08-11 10:56 ` Joakim Zhang
2021-08-11 10:56 ` Joakim Zhang
2021-08-11 13:23 ` Marc Zyngier
2021-08-11 13:23 ` Marc Zyngier
2021-08-12 14:29 ` Thierry Reding
2021-08-12 14:29 ` Thierry Reding
2021-08-12 15:26 ` Marc Zyngier
2021-08-12 15:26 ` Marc Zyngier
2021-08-13 14:44 ` Thierry Reding
2021-08-13 14:44 ` Thierry Reding
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