netdev - Re: [PATCH net-next] selftests/net: force synchronized GC for a test.

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Message-ID: <6b73aa09-b842-4bd0-abab-7011495e7176@gmail.com>
Date: Thu, 29 Feb 2024 09:39:44 -0800
From: Kui-Feng Lee <sinquersw@...il.com>
To: David Ahern <dsahern@...nel.org>, Jakub Kicinski <kuba@...nel.org>,
 Kui-Feng Lee <thinker.li@...il.com>
Cc: netdev@...r.kernel.org, ast@...nel.org, martin.lau@...ux.dev,
 kernel-team@...a.com, davem@...emloft.net, kuifeng@...a.com
Subject: Re: [PATCH net-next] selftests/net: force synchronized GC for a test.

On 2/23/24 19:15, David Ahern wrote:
> On 2/23/24 7:21 PM, Jakub Kicinski wrote:
>> On Fri, 23 Feb 2024 00:13:46 -0800 Kui-Feng Lee wrote:
>>> Due to the slowness of the test environment
>>
>> Would be interesting if it's slowness, because it failed 2 times
>> on the debug runner but 5 times on the non-debug one. We'll see.
> 
> hmmm... that should be debugged. waiting 2*N + 1 and then requesting GC
> and still failing suggests something else is at play

I did some tests, and found fib6_run_gc() do round_jiffies()
for the gc timer. So, gc_interval can increase 0.75 seconds in
some case. I am doing more investigation on this.