From: Stanislav Fomichev <[email protected]>
To: David Wei <[email protected]>
Cc: [email protected], [email protected],
Jens Axboe <[email protected]>,
Pavel Begunkov <[email protected]>,
Jakub Kicinski <[email protected]>, Paolo Abeni <[email protected]>,
"David S. Miller" <[email protected]>,
Eric Dumazet <[email protected]>,
Jesper Dangaard Brouer <[email protected]>,
David Ahern <[email protected]>,
Mina Almasry <[email protected]>
Subject: Re: [PATCH v1 13/15] io_uring/zcrx: add copy fallback
Date: Tue, 8 Oct 2024 08:58:36 -0700 [thread overview]
Message-ID: <ZwVWrAeKsVj5gbXY@mini-arch> (raw)
In-Reply-To: <[email protected]>
On 10/07, David Wei wrote:
> From: Pavel Begunkov <[email protected]>
>
> There are scenarios in which the zerocopy path might get a normal
> in-kernel buffer, it could be a mis-steered packet or simply the linear
> part of an skb. Another use case is to allow the driver to allocate
> kernel pages when it's out of zc buffers, which makes it more resilient
> to spikes in load and allow the user to choose the balance between the
> amount of memory provided and performance.
Tangential: should there be some clear way for the users to discover that
(some counter of some entry on cq about copy fallback)?
Or the expectation is that somebody will run bpftrace to diagnose
(supposedly) poor ZC performance when it falls back to copy?
next prev parent reply other threads:[~2024-10-08 15:58 UTC|newest]
Thread overview: 126+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-07 22:15 [PATCH v1 00/15] io_uring zero copy rx David Wei
2024-10-07 22:15 ` [PATCH v1 01/15] net: devmem: pull struct definitions out of ifdef David Wei
2024-10-09 20:17 ` Mina Almasry
2024-10-09 23:16 ` Pavel Begunkov
2024-10-10 18:01 ` Mina Almasry
2024-10-10 18:57 ` Pavel Begunkov
2024-10-13 22:38 ` Pavel Begunkov
2024-10-07 22:15 ` [PATCH v1 02/15] net: prefix devmem specific helpers David Wei
2024-10-09 20:19 ` Mina Almasry
2024-10-07 22:15 ` [PATCH v1 03/15] net: generalise net_iov chunk owners David Wei
2024-10-08 15:46 ` Stanislav Fomichev
2024-10-08 16:34 ` Pavel Begunkov
2024-10-09 16:28 ` Stanislav Fomichev
2024-10-11 18:44 ` David Wei
2024-10-11 22:02 ` Pavel Begunkov
2024-10-11 22:25 ` Mina Almasry
2024-10-11 23:12 ` Pavel Begunkov
2024-10-09 20:44 ` Mina Almasry
2024-10-09 22:13 ` Pavel Begunkov
2024-10-09 22:19 ` Pavel Begunkov
2024-10-07 22:15 ` [PATCH v1 04/15] net: page_pool: create hooks for custom page providers David Wei
2024-10-09 20:49 ` Mina Almasry
2024-10-09 22:02 ` Pavel Begunkov
2024-10-07 22:15 ` [PATCH v1 05/15] net: prepare for non devmem TCP memory providers David Wei
2024-10-09 20:56 ` Mina Almasry
2024-10-09 21:45 ` Pavel Begunkov
2024-10-13 22:33 ` Pavel Begunkov
2024-10-07 22:15 ` [PATCH v1 06/15] net: page_pool: add ->scrub mem provider callback David Wei
2024-10-09 21:00 ` Mina Almasry
2024-10-09 21:59 ` Pavel Begunkov
2024-10-10 17:54 ` Mina Almasry
2024-10-13 17:25 ` David Wei
2024-10-14 13:37 ` Pavel Begunkov
2024-10-14 22:58 ` Mina Almasry
2024-10-16 17:42 ` Pavel Begunkov
2024-11-01 17:18 ` Mina Almasry
2024-11-01 18:35 ` Pavel Begunkov
2024-11-01 19:24 ` Mina Almasry
2024-11-01 21:38 ` Pavel Begunkov
2024-11-04 20:42 ` Mina Almasry
2024-11-04 21:27 ` Pavel Begunkov
2024-10-07 22:15 ` [PATCH v1 07/15] net: page pool: add helper creating area from pages David Wei
2024-10-09 21:11 ` Mina Almasry
2024-10-09 21:34 ` Pavel Begunkov
2024-10-07 22:15 ` [PATCH v1 08/15] net: add helper executing custom callback from napi David Wei
2024-10-08 22:25 ` Joe Damato
2024-10-09 15:09 ` Pavel Begunkov
2024-10-09 16:13 ` Joe Damato
2024-10-09 19:12 ` Pavel Begunkov
2024-10-07 22:15 ` [PATCH v1 09/15] io_uring/zcrx: add interface queue and refill queue David Wei
2024-10-09 17:50 ` Jens Axboe
2024-10-09 18:09 ` Jens Axboe
2024-10-09 19:08 ` Pavel Begunkov
2024-10-11 22:11 ` Pavel Begunkov
2024-10-13 17:32 ` David Wei
2024-10-07 22:15 ` [PATCH v1 10/15] io_uring/zcrx: add io_zcrx_area David Wei
2024-10-09 18:02 ` Jens Axboe
2024-10-09 19:05 ` Pavel Begunkov
2024-10-09 19:06 ` Jens Axboe
2024-10-09 21:29 ` Mina Almasry
2024-10-07 22:15 ` [PATCH v1 11/15] io_uring/zcrx: implement zerocopy receive pp memory provider David Wei
2024-10-09 18:10 ` Jens Axboe
2024-10-09 22:01 ` Mina Almasry
2024-10-09 22:58 ` Pavel Begunkov
2024-10-10 18:19 ` Mina Almasry
2024-10-10 20:26 ` Pavel Begunkov
2024-10-10 20:53 ` Mina Almasry
2024-10-10 20:58 ` Mina Almasry
2024-10-10 21:22 ` Pavel Begunkov
2024-10-11 0:32 ` Mina Almasry
2024-10-11 1:49 ` Pavel Begunkov
2024-10-07 22:16 ` [PATCH v1 12/15] io_uring/zcrx: add io_recvzc request David Wei
2024-10-09 18:28 ` Jens Axboe
2024-10-09 18:51 ` Pavel Begunkov
2024-10-09 19:01 ` Jens Axboe
2024-10-09 19:27 ` Pavel Begunkov
2024-10-09 19:42 ` Jens Axboe
2024-10-09 19:47 ` Pavel Begunkov
2024-10-09 19:50 ` Jens Axboe
2024-10-07 22:16 ` [PATCH v1 13/15] io_uring/zcrx: add copy fallback David Wei
2024-10-08 15:58 ` Stanislav Fomichev [this message]
2024-10-08 16:39 ` Pavel Begunkov
2024-10-08 16:40 ` David Wei
2024-10-09 16:30 ` Stanislav Fomichev
2024-10-09 23:05 ` Pavel Begunkov
2024-10-11 6:22 ` David Wei
2024-10-11 14:43 ` Stanislav Fomichev
2024-10-09 18:38 ` Jens Axboe
2024-10-07 22:16 ` [PATCH v1 14/15] io_uring/zcrx: set pp memory provider for an rx queue David Wei
2024-10-09 18:42 ` Jens Axboe
2024-10-10 13:09 ` Pavel Begunkov
2024-10-10 13:19 ` Jens Axboe
2024-10-07 22:16 ` [PATCH v1 15/15] io_uring/zcrx: throttle receive requests David Wei
2024-10-09 18:43 ` Jens Axboe
2024-10-07 22:20 ` [PATCH v1 00/15] io_uring zero copy rx David Wei
2024-10-08 23:10 ` Joe Damato
2024-10-09 15:07 ` Pavel Begunkov
2024-10-09 16:10 ` Joe Damato
2024-10-09 16:12 ` Jens Axboe
2024-10-11 6:15 ` David Wei
2024-10-09 15:27 ` Jens Axboe
2024-10-09 15:38 ` David Ahern
2024-10-09 15:43 ` Jens Axboe
2024-10-09 15:49 ` Pavel Begunkov
2024-10-09 15:50 ` Jens Axboe
2024-10-09 16:35 ` David Ahern
2024-10-09 16:50 ` Jens Axboe
2024-10-09 16:53 ` Jens Axboe
2024-10-09 17:12 ` Jens Axboe
2024-10-10 14:21 ` Jens Axboe
2024-10-10 15:03 ` David Ahern
2024-10-10 15:15 ` Jens Axboe
2024-10-10 18:11 ` Jens Axboe
2024-10-14 8:42 ` David Laight
2024-10-09 16:55 ` Mina Almasry
2024-10-09 16:57 ` Jens Axboe
2024-10-09 19:32 ` Mina Almasry
2024-10-09 19:43 ` Pavel Begunkov
2024-10-09 19:47 ` Jens Axboe
2024-10-09 17:19 ` David Ahern
2024-10-09 18:21 ` Pedro Tammela
2024-10-10 13:19 ` Pavel Begunkov
2024-10-11 0:35 ` David Wei
2024-10-11 14:28 ` Pedro Tammela
2024-10-11 0:29 ` David Wei
2024-10-11 19:43 ` Mina Almasry
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