Date: Thu, 11 Aug 2016 09:36:21 -0700 From: Adrian Chadd <adrian.chadd@gmail.com> To: Ben RUBSON <ben.rubson@gmail.com> Cc: FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: Unstable local network throughput Message-ID: <CAJ-VmongwvbY3QqKBV%2BFJCHOfSdr-=v9CmLH1z=Tqwz19AtUpg@mail.gmail.com> In-Reply-To: <7DD30CE7-32E6-4D26-91D4-C1D4F2319655@gmail.com> References: <3C0D892F-2BE8-4650-B9FC-93C8EE0443E1@gmail.com> <bed13ae3-0b8f-b1af-7418-7bf1b9fc74bc@selasky.org> <3B164B7B-CBFB-4518-B57D-A96EABB71647@gmail.com> <5D6DF8EA-D9AA-4617-8561-2D7E22A738C3@gmail.com> <BD0B68D1-CDCD-4E09-AF22-34318B6CEAA7@gmail.com> <CAJ-VmomW0Wth-uQU-OPTfRAsXW1kTDy-VyO2w-pgNosb-N1o=Q@mail.gmail.com> <B4D77A84-8F02-43E7-AD65-5B92423FC344@gmail.com> <CAJ-Vmo=Mfcvd41gtrt8GJfEtP-DQFfXt7pZ8eRLQzu73M=sX4A@mail.gmail.com> <7DD30CE7-32E6-4D26-91D4-C1D4F2319655@gmail.com>
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Hi! mlx4_core0: <mlx4_core> mem 0xfbe00000-0xfbefffff,0xfb000000-0xfb7fffff irq 64 at device 0.0 numa-domain 1 on pci16 mlx4_core: Initializing mlx4_core: Mellanox ConnectX VPI driver v2.1.6 (Aug 11 2016) so the NIC is in numa-domain 1. Try pinning the worker threads to numa-domain 1 when you run the test: numactl -l first-touch-rr -m 1 -c 1 ./test-program You can also try pinning the NIC threads to numa-domain 1 versus 0 (so the second set of CPUs, not the first set.) vmstat -ia | grep mlx (get the list of interrupt thread ids) then for each: cpuset -d 1 -x <irq id> Run pcm-memory.x each time so we can see the before and after effects on local versus remote memory access. Thanks! -adrian
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