mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > Software

Reply
 
Thread Tools
Old 2015-03-13, 05:41   #1
Dale Mahalko
 
Mar 2015

2 Posts
Talking HTML5 prime number searching?

I am a school tech support employee, and occasionally I get people bringing in broken Chromebooks where they say "it's slow" "it's crashing" etc, but then when I use it I can't find anything wrong.

I need some way to torture the CPU and memory in Chromebooks to force it to crash, and Prime95 has been very helpful in the past when dealing with unstable Windows computers.

Is it possible to implement a prime number worker in HTML5 so I can make these poor weak little Chromebook CPUs cry out for mercy?
Dale Mahalko is offline   Reply With Quote
Old 2015-03-13, 10:26   #2
paulunderwood
 
paulunderwood's Avatar
 
Sep 2002
Database er0rr

23×491 Posts
Default

http://www.mersenneforum.org/showpos...5&postcount=73 has my HTML/JavaScript program, but maybe better would be a tight floating point loop

Last fiddled with by paulunderwood on 2015-03-13 at 10:30
paulunderwood is offline   Reply With Quote
Old 2015-03-15, 00:10   #3
tului
 
Jan 2013

1048 Posts
Default

Couldn't you chroot some Linux and run mprime?
tului is offline   Reply With Quote
Old 2015-03-15, 01:41   #4
Dale Mahalko
 
Mar 2015

2 Posts
Default

The problem is that I am trying to diagnose what's wrong with a Chromebook "as-is" without extensively modifying the system. It may end up running an entirely different OS version when the flash is erased and switched to the developer mode OS.

Imagine having to wipe out Windows 7 on a device and having to format the drive and load say Debian to do stress testing. The test environment is now completely different from where we started and may not even be a valid comparison vs running with Windows 7.

Google is annoying in this regard because they provide absolutely nothing for hardware diagnostics and monitoring when a Chromebook is running in the default dumbed-down OS mode.
Dale Mahalko is offline   Reply With Quote
Old 2015-03-15, 06:18   #5
Jayder
 
Jayder's Avatar
 
Dec 2012

27810 Posts
Default

I have never used a chromebook so I'm not quite sure what will do the trick for you. Do you know about crosh and its memtest? Is it very effective? If not, would loading (and tiling) 20 tabs of high resolution 3D models test it in the way you want it to?

As for CPU, what came to my mind was this folding@home browser app. Does it even work on your chromebooks?

I apologise if none of this is of any use to you.

Last fiddled with by Jayder on 2015-03-15 at 06:19
Jayder is offline   Reply With Quote
Old 2015-03-15, 14:29   #6
EdH
 
EdH's Avatar
 
"Ed Hall"
Dec 2009
Adirondack Mtns

3×372 Posts
Default

If you're interested in stress testing the hardware, can you simply create a Live USB of linux with mprime and run that? That would not touch the local OS.
EdH is offline   Reply With Quote
Old 2015-03-16, 17:08   #7
henryzz
Just call me Henry
 
henryzz's Avatar
 
"David"
Sep 2007
Cambridge (GMT/BST)

5×1,187 Posts
Default

Quote:
Originally Posted by EdH View Post
If you're interested in stress testing the hardware, can you simply create a Live USB of linux with mprime and run that? That would not touch the local OS.
Also possible with windows:
http://lifehacker.com/how-to-run-a-p...dri-1565509124
henryzz is offline   Reply With Quote
Old 2015-03-21, 19:55   #8
clarke
 
Feb 2009

22·7 Posts
Default

You can't boot Chromebook from a USB drive without switching it into dev mode first. Switching is accompanied with powerwash. Though all the user profile data is stored at Google and restored back after sign-in to the account.
So, testing Chromebook includes:
1) switch to dev mode with auto powerwash
2) enabling booting from USB
3) loading live OS and testing
4) switching back from dev mode and auto powerwash (boot from USB will be switched off after this)
clarke is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Elementary Literature on probabilistic aspects of prime searching hhh Math 7 2014-03-18 14:37
Question about multi-core prime searching. Trilo Riesel Prime Search 33 2013-09-19 21:21
Fermat number and Modulo for searching divisors CyD Factoring 4 2011-05-31 11:24
idea for twin prime searching Mini-Geek Twin Prime Search 8 2011-01-30 00:18
Searching for user BlueSoda (no its not a prime) ltd Prime Sierpinski Project 3 2006-03-23 19:27

All times are UTC. The time now is 11:45.


Sat Nov 27 11:45:33 UTC 2021 up 127 days, 6:14, 0 users, load averages: 0.77, 1.08, 1.14

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.