netdev - Re: Increased memory usage on NUMA nodes with ICE driver after upgrade to 6.13.y (regression in commit 492a044508ad)

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Message-ID: <20250416154436.179ba4e9@kernel.org>
Date: Wed, 16 Apr 2025 15:44:36 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Jaroslav Pulchart <jaroslav.pulchart@...ddata.com>
Cc: Przemek Kitszel <przemyslaw.kitszel@...el.com>, jdamato@...tly.com,
 intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org, Tony Nguyen
 <anthony.l.nguyen@...el.com>, Igor Raits <igor@...ddata.com>, Daniel Secik
 <daniel.secik@...ddata.com>, Zdenek Pesek <zdenek.pesek@...ddata.com>, Eric
 Dumazet <edumazet@...gle.com>, Martin Karsten <mkarsten@...terloo.ca>,
 Ahmed Zaki <ahmed.zaki@...el.com>, "Czapnik, Lukasz"
 <lukasz.czapnik@...el.com>, Michal Swiatkowski
 <michal.swiatkowski@...ux.intel.com>
Subject: Re: Increased memory usage on NUMA nodes with ICE driver after
 upgrade to 6.13.y (regression in commit 492a044508ad)

On Wed, 16 Apr 2025 18:03:52 +0200 Jaroslav Pulchart wrote:
> > FWIW you can also try the tools/net/ynl/samples/page-pool
> > application, not sure if Intel NICs init page pools appropriately
> > but this will show you exactly how much memory is sitting on Rx rings
> > of the driver (and in net socket buffers).  
> 
> I'm not familiar with the page-pool tool, I try to build it, run it
> and nothing is shown. Any hint/menual how to use it?

It's pretty dumb, you run it and it tells you how much memory is
allocated by Rx page pools. Commit message has an example:
https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=637567e4a3ef6f6a5ffa48781207d270265f7e68