linux-kernel - Re: [LKP] [lkp] [sctp] a6c2f79287: netperf.Throughput

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Message-ID: <ad074d65-52bd-7b6f-f0c3-b94abf288c9a@gmail.com>
Date:   Fri, 19 Aug 2016 04:19:39 -0300
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     Aaron Lu <aaron.lu@...el.com>, Xin Long <lucien.xin@...il.com>
Cc:     kernel test robot <xiaolong.ye@...el.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org,
        "David S. Miller" <davem@...emloft.net>,
        LKML <linux-kernel@...r.kernel.org>,
        "Chen, Tim C" <tim.c.chen@...el.com>,
        Huang Ying <ying.huang@...el.com>
Subject: Re: [LKP] [lkp] [sctp] a6c2f79287: netperf.Throughput_Mbps -37.2%
 regression

Hi,

Em 19-08-2016 02:29, Aaron Lu escreveu:
...
> It doesn't look insane and sctp_wait_for_sndbuf may actually have
> something to do with a larger sctp_chunk I suppose?
>
> The same perf record doesn't capture any sample for the good commit,
> which suggests the nerperf process doesn't sleep in sctp_wait_for_sndbuf.

Ahhh yes! It does, and then it would mean your txbuf is too small for 
the chunk sizes you're using (sctp tests option -m).

What's your netperf cmdline again please?

Regards,
Marcelo