mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 1000
Search took 0.45 seconds.
Search: Posts Made By: ewmayer
Forum: Mlucas 2021-01-14, 00:09
Replies: 68
Views: 16,480
Posted By ewmayer
-DUSE_THREADS is needed to enable multithreaded...

-DUSE_THREADS is needed to enable multithreaded build mode; without it you get a single-threaded build, which would only be useful if all you ever wanted to do is run one such 1-thread job per core....
Forum: Mlucas 2021-01-12, 21:02
Replies: 68
Views: 16,480
Posted By ewmayer
@pvn: The self-tests are intended to do two...

@pvn:

The self-tests are intended to do two things:

[1] Check correctness of the compiled code;

[2] Find the best-performing combination of radices for each FFT length on the user's...
Forum: Hardware 2020-12-30, 06:22
Replies: 156
Views: 22,050
Posted By ewmayer
Interesting, but ugh - that kind of...

Interesting, but ugh - that kind of nonportability is only worth it if it offers huge performance benefits for one's application.

Brief update re. Mlucas-on-M1: Laurent Desnogues has a...
Forum: Hardware 2020-12-23, 20:03
Replies: 156
Views: 22,050
Posted By ewmayer
You'll need to be specific as to what you man by...

You'll need to be specific as to what you man by "toy". If you mean Mlucas, it's had Arm64 128-bit SIMD assembly support since 2017. I no longer run it my little Odroid because that is too slow, only...
Forum: GpuOwl 2020-12-23, 19:49
Replies: 2,686
Views: 196,826
Posted By ewmayer
MattL, how many watts-at-wall (above system...

MattL, how many watts-at-wall (above system baseline) is the system pulling with the R7 Pro running?
Forum: Math 2020-12-15, 23:30
Replies: 16
Views: 561
Posted By ewmayer
@OP: Suggest you try a tiny M(p) example: n =...

@OP: Suggest you try a tiny M(p) example: n = M(11) = 2^11-1 = 23*89. The 2 prime factors have p-1 decompositions:

p = 23: p-1 = 2*11
q = 89: q-1 = 2^3*11

So taking E = 2*11 in p-1 stage 1...
Forum: Mlucas 2020-12-11, 21:41
Replies: 68
Views: 16,480
Posted By ewmayer
@pvn: Sorry for belated reply - that warning...

@pvn: Sorry for belated reply - that warning message is more common for larger threadcounts, it's basically telling you that part of the FFT code needs the leading (leftmost in the "Using complex FFT...
Forum: Hardware 2020-12-02, 20:33
Replies: 149
Views: 11,023
Posted By ewmayer
Just did a reboot and had a look at the CPU...

Just did a reboot and had a look at the CPU Configuration menu in the BIOs:

o CPU freq = 1.4GHz and not BIOS-adjustable (nor the min.max ratios), L1 = 4352KB (4.25MB), L2 = 34816KB (34MB),

o...
Forum: Hardware 2020-12-02, 03:38
Replies: 149
Views: 11,023
Posted By ewmayer
Yes, I took 'onboard' to mean in the CPU package...

Yes, I took 'onboard' to mean in the CPU package proper, because for it to be used to imply 'on the (mother)board' would be inane - as opposed to 'onshore'? - but apparently the mobo manual's usage...
Forum: Hardware 2020-12-01, 22:29
Replies: 149
Views: 11,023
Posted By ewmayer
From the mobo manual, I've bolded the relevant...

From the mobo manual, I've bolded the relevant snip:

"Memory Frequency
Use this feature to set the maximum memory frequency for onboard memory modules. The options are Auto, 1600, 1867, 2133, and...
Forum: Hardware 2020-12-01, 20:32
Replies: 21
Views: 1,710
Posted By ewmayer
I misspoke re. number-of-GPRs-available above ......

I misspoke re. number-of-GPRs-available above ... there are in fact 32, my Mlucas macros only ever use ones from the bottom 16, x0-x15. Laurent sent me a link to the Apple Developer page Writing...
Forum: Hardware 2020-12-01, 20:20
Replies: 149
Views: 11,023
Posted By ewmayer
First performance-tweak I tried was fiddling with...

First performance-tweak I tried was fiddling with the onboard-memory frequency. The mobo User Manual uses a quite stupid scheme for indicating submenu levels, right arrows of slightly differing sizes...
Forum: Hardware 2020-11-30, 22:11
Replies: 149
Views: 11,023
Posted By ewmayer
I found some useful perforated-metal-sheet...

I found some useful perforated-metal-sheet product listings here (https://www.amazon.com/Perforated-Metal-Sheets/s?k=Perforated+Metal+Sheets), but those are building-supply-oriented, few fine-mesh...
Forum: Hardware 2020-11-30, 20:00
Replies: 149
Views: 11,023
Posted By ewmayer
Yeah, that was a rather shoddy job w.r.to PSU...

Yeah, that was a rather shoddy job w.r.to PSU securement. Does your system also have the power plug which likes to disconnect at the slightest jiggling of the case?


It will support both - as I...
Forum: Hardware 2020-11-29, 23:22
Replies: 149
Views: 11,023
Posted By ewmayer
Spoke too soon - I neglected to mention that...

Spoke too soon - I neglected to mention that temperature was with the case side panel on the CPU side of the mobo removed - I put the panel back on last night and the temp quickly rose by over 10C...
Forum: Hardware 2020-11-29, 23:20
Replies: 149
Views: 11,023
Posted By ewmayer
My old Haswell system has an old non-modular PSU...

My old Haswell system has an old non-modular PSU with just a single 8-pin PCIe ... I manage to host 2 Radeon VIIs in it by ganging together the 2 6-pin PCI connectors into another 8-pin, then using...
Forum: Hardware 2020-11-29, 21:00
Replies: 21
Views: 1,710
Posted By ewmayer
Laurent PMed me results of a clang/llvm Mlucas...

Laurent PMed me results of a clang/llvm Mlucas build attempt. Most of the source files compiled fine, but there is a subset which failed, all due to clang reporting "error: inline assembly requires...
Forum: Hardware 2020-11-28, 03:17
Replies: 149
Views: 11,023
Posted By ewmayer
@Paul: 'yum list available >& pkgs.txt' gives a...

@Paul: 'yum list available >& pkgs.txt' gives a 5285-line file, a bzip2 of which is attached. Of especial interest to me - you already noted the first one:

gmp-devel.x86_64
lm_sensors.x86_64
...
Forum: Hardware 2020-11-27, 22:10
Replies: 21
Views: 1,710
Posted By ewmayer
Hi, Laurent - the Mlucas-for-ARM-128-bit-SIMD...

Hi, Laurent - the Mlucas-for-ARM-128-bit-SIMD binaries I posted via the README are alas for Linux (e.g. Raspberry Pi, Odroid, Android phones with suitable CPUs), but hopefully the same build...
Forum: Hardware 2020-11-26, 22:56
Replies: 149
Views: 11,023
Posted By ewmayer
See my edit to the above post - transient wifi...

See my edit to the above post - transient wifi outage, it seems.

Installed gcc (it grabs 8.3.1) and gdb ... ssh is clearly already working, and python3 also there. One yum no-package-found does...
Forum: Hardware 2020-11-26, 22:28
Replies: 149
Views: 11,023
Posted By ewmayer
One more Q re. remote access: "hostname -I" gives...

One more Q re. remote access: "hostname -I" gives no fewer than 3 IPs:

192.168.0.89 192.168.0.84 192.168.221.1 [ssh-key stuff]

Tried sshing in from laptop using alternately each of those 3 IPs,...
Forum: Hardware 2020-11-26, 22:00
Replies: 149
Views: 11,023
Posted By ewmayer
Alas, pressing - either quickly or...

Alas, pressing - either quickly or hold-for-a-while - that button only resets the WPS, LED blinks for a few seconds and then relights solid green. Ah, well, maybe later will figure out a way to...
Forum: Hardware 2020-11-26, 19:57
Replies: 149
Views: 11,023
Posted By ewmayer
It's a standard-issue Netgear modem router,...

It's a standard-issue Netgear modem router, designed to be compatible with my Comcast cable+internet service - I bought it a few months after moving into my current place, to replace the Comcast...
Forum: Hardware 2020-11-26, 02:54
Replies: 149
Views: 11,023
Posted By ewmayer
Question Update: - sofa moved, ethernet cable hooked...

Update:
- sofa moved, ethernet cable hooked into router
- on plugging other end ito KNL and activating the connection, /etc/resolv.conf now shows the same nameservers I see on my Mac's airport...
Forum: Hardware 2020-11-25, 23:47
Replies: 149
Views: 11,023
Posted By ewmayer
It's there, 'nameserver 192.168.2.1' ... per my...

It's there, 'nameserver 192.168.2.1' ... per my Mac wifi details, my router is 192.168.0.1, but using the shared connection, from the KNL I was unable to successfully ping ...0.1 and ...1.1, but ping...
Showing results 1 to 25 of 1000

 
All times are UTC. The time now is 15:43.

Fri Jan 15 15:43:41 UTC 2021 up 43 days, 11:55, 0 users, load averages: 1.56, 1.73, 1.74

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.