Date: Mon, 13 Nov 2017 20:54:05 -0700 From: Warner Losh <imp@bsdimp.com> To: Larry McVoy <lm@mcvoy.com> Cc: "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org>, Scott Long <scottl@netflix.com>, Kevin Bowling <kbowling@llnw.com>, Drew Gallatin <gallatin@netflix.com> Subject: Re: small patch for numactl. Comments? Message-ID: <CANCZdfriHqRAfmtU-PXc_fAFQPiYRUYK=aw6LpDBOeMnQEGF_Q@mail.gmail.com> In-Reply-To: <20171114020138.GA18863@mcvoy.com> References: <20171114020138.GA18863@mcvoy.com>
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On Mon, Nov 13, 2017 at 7:01 PM, Larry McVoy <lm@mcvoy.com> wrote:
> Hi folks, some CDN people are dragging me out of retirement to work
> on FreeBSD. Which I have to say is sort of fun since I started my
> kernel hacking on SunOS 4.x which was a very very nice version of
> BSD. But FreeBSD has mostly caught up, so it's pleasant.
>
> I'm wacking LMbench to be numa aware and this patch would help me make
> sure that when you are a numa machine you could insist that people
> run the benchmark via numactl (imma gonna blog about numa, it sucks
> unless you are numa aware).
>
> I did some docs but I'm new to the FreeBSD man macros, would love
> feedback on how to do that right.
>
> --- numactl.1 2017-11-13 17:51:26.243473000 -0800
> +++ numactl.1.lm 2017-11-13 17:51:20.494596000 -0800
> @@ -107,6 +107,15 @@
> .El
> .Sh EXIT STATUS
> .Ex -std
> +.Sh ENVIRONMENT
> +.Nm
> +sets the environment variable
>
> +\fINUMACTL=YES\fP
>
.Va NUMACTL=YES
The rest looks good...
Warner
+before running
> +.Ar cmd ...
> +so that programs that know that they need to be run under
> +.Nm
> +can check.
> .Sh EXAMPLES
> Create a
> .Pa /bin/sh
> --- numactl.c 2017-11-13 16:18:36.134359000 -0800
> +++ numactl.c.lm 2017-11-13 16:18:28.530953000 -0800
> @@ -231,6 +231,7 @@
> (void) set_numa_domain_cpuaffinity(cpu_domain,
> CPU_WHICH_PID, -1);
>
> + putenv("NUMACTL=YES");
> errno = 0;
> execvp(*argv, argv);
> err(errno == ENOENT ? 127 : 126, "%s", *argv);
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