netdev - Re: [TEST] gre_multipath_nh

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Message-ID: <20240219111721.2f97be53@kernel.org>
Date: Mon, 19 Feb 2024 11:17:21 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Ido Schimmel <idosch@...dia.com>
Cc: Petr Machata <petrm@...dia.com>, "netdev@...r.kernel.org"
 <netdev@...r.kernel.org>
Subject: Re: [TEST] gre_multipath_nh_res takes forever

On Mon, 19 Feb 2024 18:50:58 +0200 Ido Schimmel wrote:
> > I bumped the timeouts for forwarding tests with kernel debug enabled
> > yesterday, and gre_multipath_nh_res still doesn't finish even tho it
> > runs for close to 3 hours. On a non-debug kernel it takes around 30min.
> > 
> > You probably have a better idea how to address this than me, but it
> > seems to time out on the IPv6 tests - I wonder if using mausezahn 
> > instead of ping for IPv6 would help a bit?  
> 
> Converted from ping6 to mausezahn, but the test was still relatively
> slow because of the 1msec delay we pass the mausezahn. After converting
> to mausezahn and removing the delay the runtime dropped from ~350
> seconds to ~15 seconds on my system.

Great!

> I think I will parametrize the delay for platforms that might need it,
> but default it to 0 as it's not needed with veth. The same change is
> needed in other tests. Will submit it together with Petr's selftest
> changes.

SG, thanks!