From: Stephen Hemminger <stephen@networkplumber.org>
To: Ed Czeck <ed.czeck@atomicrules.com>
Cc: dev@dpdk.org, Shepard Siegel <shepard.siegel@atomicrules.com>,
John Miller <john.miller@atomicrules.com>
Subject: Re: [PATCH v2 4/4] net/ark: improve Rx queue recovery after mbuf exhaustion
Date: Sat, 13 Sep 2025 09:26:43 -0700 [thread overview]
Message-ID: <20250913092643.19f7b698@hermes.local> (raw)
In-Reply-To: <20250910185720.995300-4-ed.czeck@atomicrules.com>
On Wed, 10 Sep 2025 14:57:20 -0400
Ed Czeck <ed.czeck@atomicrules.com> wrote:
> use 4-K page aligned buffers to reduce PCIe requests
> reduce message spew
> attempt to allocate smaller chunks of buffers during starvation
>
> Signed-off-by: Ed Czeck <ed.czeck@atomicrules.com>
> ---
> v2:
> - reduced message to single line.
> - Added comments on buffer alignment. PCIe devices deal with page
> size of 4096 bytes. By aligning this buffer to a 4K boundary, we
> will reduce the number of PCIe read requests.
It would be clearer if there was a #define for the magic 4096 size.
Is the IOMMU page size? The PCI devices themselves don't usually
have page visibility.
Alignment in this case is really a workaround for "don't cross
the boundary". It looks like the rte_malloc library doesn't have
better way to express that.
next prev parent reply other threads:[~2025-09-13 16:26 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-10 18:57 [PATCH v2 1/4] net/ark: add PCIe IDS for newly supported devices Ed Czeck
2025-09-10 18:57 ` [PATCH v2 2/4] net/ark: remove double mbuf frees Ed Czeck
2025-09-10 18:57 ` [PATCH v2 3/4] net/ark: improve ring handling for segmented packets Ed Czeck
2025-09-10 18:57 ` [PATCH v2 4/4] net/ark: improve Rx queue recovery after mbuf exhaustion Ed Czeck
2025-09-13 16:26 ` Stephen Hemminger [this message]
-- strict thread matches above, loose matches on Subject: below --
2025-09-03 21:28 [PATCH 1/4] net/ark: add PCIe IDS for newly supported devices Ed Czeck
2025-09-10 19:04 ` [PATCH v2 " Ed Czeck
2025-09-10 19:04 ` [PATCH v2 4/4] net/ark: improve Rx queue recovery after mbuf exhaustion Ed Czeck
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