Date: Mon, 29 Oct 2018 05:16:13 +0000 From: Rick Macklem <rmacklem@uoguelph.ca> To: Andrew Vylegzhanin <avv314@gmail.com>, "freebsd-infiniband@freebsd.org" <freebsd-infiniband@freebsd.org>, "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: Re: NFS + Infiniband problem Message-ID: <YTOPR0101MB11620EA85EB06C0F2623E7CCDDF30@YTOPR0101MB1162.CANPRD01.PROD.OUTLOOK.COM> In-Reply-To: <CA%2BBi_YiHoxFc3wsEPnMeBHWgW-nh6sXQCEgBTb=-nD6-XcjZ%2Bg@mail.gmail.com> References: <CA%2BBi_YiHoxFc3wsEPnMeBHWgW-nh6sXQCEgBTb=-nD6-XcjZ%2Bg@mail.gmail.com>
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[stuff related to slow performance snipped] Try disabling TSO, that is the most common cause of NFS RPC transport issues. # sysctl net.inet.tcp.tso=3D0 will do it, if you can't do it for the interface. (Also, try disabling LSO, LRO if the interface will let you do so.) You can also try mounting with "rsize=3D8192,wsize=3D8192" and if that work= s fairly well, then just keep doubling it until it no longer works well. I know nothing about InfiniBand, so if the above doesn't help, hopefully someone familiar with InfiniBand can help. Good luck with it, rick
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