Messages

91

Blackbird / Re: Blackbird Cooling

« on: October 08, 2022, 05:15:37 pm »

I do think the case is a big part of the problem. I certainly wouldn't run even an 8-core in an mATX case. Even the 4-core in my mATX system probably runs the fans more often than I'd like.

Vikings is working on a liquid cooling setup and this might be an option for you when they get it up for sale.

There are no ambient sensors on the board that I know of, and the manual doesn't mention any. The manual adds, for what it's worth, "The C1P9S01 factory setpoint for CPU core temperature is 60°C, and the system will attempt to maintain the cores at that temperature even under light or no load. As a result, a lightly loaded system may not benefit from air drawn over the CPU heatsink(s), and mainboard / peripheral cooling predominantly comes from chassis fans in this situation. For this reason, it is important to connect at least one chassis fan providing airflow over the mainboard surface in order to provide cooling for memory modules and other active components."

92

Applications and Porting / Re: Interest in Porting Wasmtime & Cranelift

« on: October 08, 2022, 05:08:45 pm »

There's no work on Cranelift yet because I haven't gotten wasm fully working. It passes the tests but some apps inexplicably fail, and I suspect it's not handling int32s correctly which will require a non-trivial refactor.

What aspect of Wasm are you working on?

Well, "it." The Firefox code generator.

93

Applications and Porting / Re: Interest in Porting Wasmtime & Cranelift

« on: October 07, 2022, 11:24:16 pm »

There's no work on Cranelift yet because I haven't gotten wasm fully working. It passes the tests but some apps inexplicably fail, and I suspect it's not handling int32s correctly which will require a non-trivial refactor.

94

Firmware / Re: Messing with WOF Tables

« on: October 07, 2022, 11:21:05 pm »

Just wanted to say, big fan of ssheven.

Nice work on getting it ramped up, though you've already found out that the vregs on the Blackbird could get marginal with high load. Basically you have the 8-core that Raptor sells but with the paired cores still on (the 8-core they sell, two of which are in this T2, is more or less the same 16-core you have there with the paired cores fused off). Like ejfluhr, I'll be interested to hear how it works out long term with the components; my Blackbird is a little 4-core.

95

General CPU Discussion / Re: Asymmetric CPUs with the Same Core Count

« on: October 01, 2022, 01:12:02 pm »

Do you mean the timebase register? Not equivalent with the time-stamp counter on x86(_64) but should be usable for similar purposes.

https://www.gnu.org/software/libc/manual/html_node/PowerPC.html

96

Talos II / Re: Petitboot lock after Fedora 36 update

« on: September 27, 2022, 10:54:33 am »

Probably couldn't hurt, but this looks like the filesystem is corrupt enough to freak out the Petitboot kernel, so I'm not sure that would fix it.

97

Talos II / Re: Petitboot lock after Fedora 36 update

« on: September 26, 2022, 08:15:54 pm »

Firmware update??

98

GPU Compute / Accelerators / Re: Talos II GPU slot preference

« on: September 26, 2022, 10:49:43 am »

Interesting observation. I wonder how one could benchmark that.

99

Applications and Porting / Re: Firefox 91 ESR on void vs Firefox on Fedora 36

« on: September 25, 2022, 06:57:34 pm »

Yes, you can do this, though 91ESR is no longer supported. I've finally got spare cycles to finish pulling it up to 102ESR and then trying to get the last problems ironed out of it.

100

General CPU Discussion / Re: DD2.4?

« on: September 22, 2022, 06:24:28 pm »

My understanding is DD2.2 is no longer manufactured. Any that you buy are used or NOS.

I have not heard of a DD2.4 stepping and given IBM's current concentration on Power10 it doesn't seem likely.

101

General CPU Discussion / Re: Asymmetric CPUs with the Same Core Count

« on: September 20, 2022, 11:01:25 am »

I don't have a system that big, but I don't remember seeing anything like that with my dual-8. Are you sure Hostboot didn't guard anything out? (At a BMC root prompt, try `pflash -P GUARD -c` to ensure there are no guard entries in the PNOR.)

102

Applications and Porting / Re: Thunderbird not working Debian buster (1:68.12.0-1~deb10u1 & 1:78.4.0-1~deb10u1)

« on: September 20, 2022, 10:58:37 am »

Although I use my custom-built Firefox on Fedora, I use Fedora-built Thunderbird, and no problems.

103

General Discussion / Re: Samsung PM9A1 IcyBox IB-PCI208-HS not working in one Talos II, OK in the other

« on: September 14, 2022, 04:05:59 pm »

Do the new cards work in the first workstation? I couldn't tell.

104

Operating Systems and Porting / Re: [NEWS] Debian 11 is out

« on: September 14, 2022, 04:02:43 pm »

The SC732 is very similar, though I don't know if it takes the same power supplies. I'd say the power supply replacement was the biggest reduction, but even just getting rid of the rear fan and relying on the front fans helped.

105

Blackbird / Re: Stereo audio channels swapped?

« on: September 13, 2022, 11:13:38 am »

I don't recall this being a problem on the optical output (which I feed into a Denon receiver), but maybe I'm just not discriminating enough.