[9fans] Plan 9 demos for 4+ CPUs?

[9fans] Plan 9 demos for 4+ CPUs?

[Andrew Hudson]

Has anyone given any thought to using Plan 9 as an OS vehicle for a
4-CPU or 8-CPU dog and pony show?

I ask because AMD and Intel are in a big race to show that multi-core
CPU's are cool and that people should buy them. AMD and Intel need
SMP-capable software to show that their new CPU's and server
architectures are relevant.

This in turn helps make Plan 9 more relevant.

First of all has anyone done 2X, 4X, or 8X benchmarks against Linux,
Windows, or any other OS's?

Second of all, does anyone have any demos to show off Plan 9's SMP
capabilities? Something with suitable flashing lights? 8-)

Thanks,
Andrew

Re: [9fans] Plan 9 demos for 4+ CPUs?

[geoff]

My favourite demo was ripping and compressing an entire CD in 5
minutes on an 8-processor machine by giving each CPU one track to
compress (with PAC encoding).

RE : [9fans] Plan 9 demos for 4+ CPUs?

[Frederic Bonfanti]

I ran multiple full compilations of /sys/src on a Dell Poweredge bipro in less than 7 minutes, which was *VERY* impressive both in terms of noise and light (stats -lscimE)

+F

Re: RE : [9fans] Plan 9 demos for 4+ CPUs?

[andrey mirtchovski]

i took this screenshot on monday:

http://pages.cpsc.ucalgary.ca/~mirtchov/screenshots/p9-servers.jpg

we plan to have more than a 100 of nodes like the one to the right.
i'm sure we'll make noise if they turn out to be more than just room
warmers.

RE : RE : [9fans] Plan 9 demos for 4+ CPUs?

[Frederic Bonfanti]

Andrey, your file server was the 1st machine (Plan9) right? I'm asking this because your load remains very low while your interrupt level is likely to be what occurs when storage consumes most of them.

> http://pages.cpsc.ucalgary.ca/~mirtchov/screenshots/p9-servers.jpg

Re: RE : RE : [9fans] Plan 9 demos for 4+ CPUs?

[andrey mirtchovski]

On 7/27/06, Frederic Bonfanti <f.bonfanti@freesurf.fr> wrote:
> Andrey, your file server was the 1st machine (Plan9) right? I'm asking this because your load remains very low while your interrupt level is likely to be what occurs when storage consumes most of them.

you are correct, though in this case i believe the load was caused by
a lot of ethernet traffic, not the file server itself.

Re: Re: RE : RE : [9fans] Plan 9 demos for 4+ CPUs?

[andrey mirtchovski]

> you are correct, though in this case i believe the load was caused by
> a lot of ethernet traffic, not the file server itself.
>

i mean interrupt load, not system load

RE : Re: RE : RE : [9fans] Plan 9 demos for 4+ CPUs?

[Frederic Bonfanti]

> i mean interrupt load, not system load

That was my understanding ;)

Do you use GBE? My servers were connected to HP Gigabit copper + Layer 3 switches and I must admit that 9P transfers were damn fast.

Re: RE : Re: RE : RE : [9fans] Plan 9 demos for 4+ CPUs?

[andrey mirtchovski]

yes, we use the intel gbe adapters.

> Do you use GBE? My servers were connected to HP Gigabit copper + Layer 3 switches and I must admit that 9P transfers were damn fast.
>
>

Re: [9fans] Plan 9 demos for 4+ CPUs?

[erik quanstrom]

is there any information avaliable on PAC encoding?  the best i can come up with
is a european patent.

- erik

On Thu Jul 27 17:35:22 CDT 2006, geoff@collyer.net wrote:
> My favourite demo was ripping and compressing an entire CD in 5
> minutes on an 8-processor machine by giving each CPU one track to
> compress (with PAC encoding).

Re: Re: [9fans] Plan 9 demos for 4+ CPUs?

[Anthony Sorace]

PAC was always internal-only. if i remember right, it became the basis
for the audio encoding in MPEG-4, though. it provided better
bitrate/quality and quality/cost-to-decompress ratios than mp3, but if
you can do, say, AAC, you're even with or ahead of where PAC was.

Re: Re: [9fans] Plan 9 demos for 4+ CPUs?

[Charles Forsyth]

> PAC was always internal-only.

it was spun out with Elemedia, but it was later brought back into Lucent

Re: Re: [9fans] Plan 9 demos for 4+ CPUs?

[erik quanstrom]

okay, so what is the plan 9 audio format? ☺

- erik

On Fri Jul 28 03:03:40 CDT 2006, forsyth@terzarima.net wrote:
> > PAC was always internal-only.
> 
> it was spun out with Elemedia, but it was later brought back into Lucent