Date: Fri, 21 Mar 2014 11:49:26 -0300 From: Christopher Forgeron <csforgeron@gmail.com> To: Markus Gebert <markus.gebert@hostpoint.ch> Cc: FreeBSD Net <freebsd-net@freebsd.org>, Rick Macklem <rmacklem@uoguelph.ca>, Jack Vogel <jfvogel@gmail.com> Subject: Re: 9.2 ixgbe tx queue hang Message-ID: <CAB2_NwCYtFD1hkYwO-aC%2BuyUGjU_UopExsc0Kq8afuefiSdGtA@mail.gmail.com> In-Reply-To: <34491192-F8EC-45C1-A7C8-61C3EBE5CFBD@hostpoint.ch> References: <CAB2_NwB=21H5pcx=Wzz5gV38eRN%2BtfwhY28m2FZhdEi6X3JE7g@mail.gmail.com> <1543350122.637684.1395368002237.JavaMail.root@uoguelph.ca> <CAB2_NwCGsAHdMFPoST05azb9K_O-K_khk3Bi1sF2om3puCcyCw@mail.gmail.com> <CAB2_NwC3on1xP3UAutkQa-3zu_JhK0%2B-ZjVb6_3NVemw2Or-KQ@mail.gmail.com> <CAB2_NwBSc3KWPYD-xbWYpRFTxpsKnXEr4V1ySP5g83aZM59MvQ@mail.gmail.com> <D1B4320A-DFFD-4647-8A43-238A088D7EF1@hostpoint.ch> <CAB2_NwAq-5N53hVPxOqc__kBi_QCQ0iy4fiwQJW0FTRqueN0YQ@mail.gmail.com> <34491192-F8EC-45C1-A7C8-61C3EBE5CFBD@hostpoint.ch>
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Ah, I understand the difficulties of testing production systems. However, if you can make a spare tester of the same hardware, that's perfect - And you can generate all the load you need with benchmark software like iometer, large NFS copies, or perhaps a small replica of your network. Synthetic load is easier to control, and thus easier to reproduce the issue and speed testing. Heck, you may be able to do it all by looping through your two ix adapters and never using an external client. It's a bit of a pain to setup, but it's worth the effort imo.
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