From: Chris McGee <sirnewton_01@yahoo.ca>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] Go on Plan 9?
Date: Wed, 13 Apr 2016 09:08:18 -0400 [thread overview]
Message-ID: <6590113E-4E0B-4230-95B3-DCC51263FCEB@yahoo.ca> (raw)
In-Reply-To: <69a9850fdb5870df2b5be63be82f2130@hamnavoe.com>
Thanks Richard for doing the go port to plan9/arm. I was going to start on that myself until I found out it was already done. :-)
I didn’t realize that Go was so virtual memory hungry. I wonder why stats didn’t show me a large peak of memory consumption before the go compiler died? Perhaps it allocates a huge chunk of virtual memory on startup.
I’ll check for that kernel change in my kernel source. If it’s not there I’ll recompile and give it a shot. Are these changes going to make it into the official kernel source? Any reason why everyone, even non Go users, wouldn’t want the changes?
I believe that my rpi only has the 512MB of RAM so I’ll add swap. I didn’t realize that Go programs were so heavy weight. What do embedded Go users have to do to make things work on other platforms like Linux?
Cheers,
Chris
> On Apr 13, 2016, at 5:10 AM, Richard Miller <9fans@hamnavoe.com> wrote:
>
>> I tried a bootstrapped version on my RPi but it fails with a "fork/exec ... virtual memory allocation failed” error when I try to compile anything.
>
> Go needs a lot of virtual memory - it won't even pass the installation test suite
> if you give it less than a gigabyte. That was the reason for the change to the
> definition in /sys/src/9/bcm/mem.h mentioned earlier:
>
> < #define USTKTOP 0x20000000 /* user segment end +1 */
> ---
>> #define USTKTOP 0x40000000 /* user segment end +1 */
>
> Are you running a 9pi kernel built with this change? There are newer kernel binaries
> in /n/sources/contrib/miller/9pi* with this and other tweaks applied. If you are
> using an older pi with 512MB of ram, you'll need to activate swap(8).
>
> The plan9_arm version of go is expected to be in the 1.7 release. It is already
> self hosting: if you look at the builder dashboard in http://build.golang.org
> which tracks updates being built and tested on all platforms, the "plan9 arm"
> column at the far right is a Raspberry Pi 3 managed by David du Colombier.
> It doesn't keep up with every update because a complete build and test suite
> run takes a bit over an hour.
>
>
next prev parent reply other threads:[~2016-04-13 13:08 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-12 0:59 Chris McGee
2016-04-12 19:01 ` Skip Tavakkolian
2016-04-12 19:21 ` Chris McGee
2016-04-12 19:50 ` Dave MacFarlane
2016-04-12 21:26 ` Skip Tavakkolian
2016-04-13 0:18 ` Chris McGee
2016-04-12 21:44 ` sl
2016-04-13 2:50 ` Skip Tavakkolian
2016-04-13 2:59 ` Chris McGee
2016-04-13 7:27 ` lucio
2016-04-13 9:10 ` Richard Miller
2016-04-13 9:10 ` Richard Miller
2016-04-13 13:08 ` Chris McGee [this message]
2016-04-13 13:46 ` Richard Miller
2016-04-13 14:00 ` Chris McGee
2016-04-13 14:32 ` Kenny Lasse Hoff Levinsen
2016-04-13 14:32 ` Charles Forsyth
2016-04-13 14:39 ` Richard Miller
2016-04-13 14:42 ` Charles Forsyth
2016-04-13 14:46 ` Richard Miller
2016-04-13 14:46 ` Charles Forsyth
2016-04-13 14:52 ` lucio
2016-04-13 16:12 ` Richard Miller
2016-04-13 7:21 ` lucio
2016-04-13 7:34 ` lucio
2016-04-13 20:38 ` Skip Tavakkolian
-- strict thread matches above, loose matches on Subject: below --
2016-01-26 21:52 sl
2016-01-26 22:03 ` Kenny Lasse Hoff Levinsen
2016-01-26 22:29 ` sl
2016-01-26 22:38 ` David du Colombier
2016-01-27 1:29 ` Matthew Veety
2016-01-26 21:44 Sean Caron
2016-01-26 22:05 ` Skip Tavakkolian
2016-01-26 22:16 ` Sean Caron
2016-01-26 22:32 ` David du Colombier
2016-01-26 22:40 ` David du Colombier
2016-01-27 1:40 ` Sean Caron
2016-01-27 1:52 ` Skip Tavakkolian
2016-01-27 2:24 ` Sean Caron
2016-01-27 4:04 ` lucio
2016-01-27 6:25 ` David du Colombier
2016-01-27 13:45 ` Charles Forsyth
2016-01-26 22:19 ` David du Colombier
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