2008/5/2-8 [Computer/SW/Compilers] UID:49874 Activity:low | 5/2 How do I get the L1/L2 cache size and cache line size on my machine?
Can I find this stuff out at compile time somehow?
\_ You aren't planning on running your code on any other processors?
\_ May I ask what it is you want to achieve ultimately? If you don't
know your architecture and want to find out dynamically, there are
tools that can peek/poke to give you definitive answers, plus you get
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2006/7/24-28 [Computer/HW/CPU] UID:43781 Activity:nil | 7/24 http://csua.org/u/gin (amd.com)
AMD releases new price list, effective today
FYI, Conroe is launching Thursday, but it's unclear when inventory
can satisfy demand, especially for the E6600 "sweet spot".
\_ I want the E6600, bitch, hands off! It's the nerd equivalent of
"tickle-me-Elmo"
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2006/3/1-2 [Computer/HW/CPU] UID:42039 Activity:high | 2/28 So this new Intel Mac Mini... didn't the old one have better
graphics and also cost less?
\_ I think Apple is overcharging for it, since the new model is $100
more from the last base priced model. As components go down in
price, so should the unit, or the specs should go up with a flat
price. However, keep in mind you do get 256MB more ram ($75),
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2005/3/15-16 [Computer/HW/CPU] UID:36695 Activity:high | 3/15 It's been a while since I bought a notebook. Is there any reason to
pay extra $100 to upgrade from XP Home to XP Professional? How about
Intel Pentium M Processor 7x5, do they run at decent speed relative
to say, P4? And what's the difference between 1) Crystal View XGA TFT
and 2) SXGA+ non-crystal view TFT? ok thx
\_ You definitely want a Pentium M for the power savings.
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2000/4/23-24 [Computer/HW/CPU] UID:18086 Activity:insanely high | 4/22 Ultra 10 440Mhz UltraSparc-IIi, 256MB DRAM, 2MB L2 Cache, 9GB disk,
floppy,cdrom,Creator3D Graphics,keybd/mouse/etc. for $3200 brand new
from Sun. Thinking of buying one, for personal use. What do you think?
\_ I'm so pleased that you asked. This machine gets 18.1 SPECint95,
22.7 SPECfp95. For $3500, you could get a dual
Pentium-III/750E, which gets something like 36 SPECint95 per CPU,
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1999/11/20-22 [Computer/HW/CPU] UID:16930 Activity:moderate | 11/19 Anyone have a link to a description of where the cache is on the
celeron vs. where it is on the pentium ][? A friend of mine is
trying to argue that the celeron's is not on the CPU, but is for the
pentium. That's just wrong, but I want definitive proof to fuck him up.
\_ I believe in early editions of the celeron, your friend is right.
However, in later editions of the celeron, they added a
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1999/9/8 [Computer/HW/Memory] UID:16482 Activity:moderate | 9/7 As a general rule, do mobile celerons outperform mobile pentium 2s?
\_ I wouldn't think so, since the general appeal of celerons seems
to be their ability to take massive overclocking, and in a
laptop you probably won't be able to fit the requisite cooling.
\_ mobile celery has 128k L2 on die, mobile p2 has 256k L2 on die,
and are pretty much the same else where, which do u think is
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1999/8/19-20 [Computer/SW/Security] UID:16348 Activity:high | 8/19 Is it possible to disrupt GPS signal? Can Russians/Chinese send
a satellite that sends false signal?
\-well i guess i am now the gps "expert". well, yes, of course
the system/signal can be disrupted. whether it can be spoofed
is a trickier question ... because that is a detection-evasion
issue. the answer depends on what scenario you are looking at.
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1999/7/5-6 [Computer/HW/CPU] UID:16071 Activity:very high | 7/4 Does anyone know how processor-intensive MP3 decoding generally is?
My Celeron 300 is claiming to consume only 0.1% of the CPU according
to top but my PentiumMMX 150 could barely keep up.
\_ this doesn't answer the question, but I bet FPU, MMX, OS, and
player all could have contributed to your results
\_ pMMX150 256k L2 win95 winamp 3 >50% CPU vs.
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1999/4/28 [Computer/HW/Memory] UID:15712 Activity:high | 4/27 Is the cache expansion port on different brands of PC motherboards
compatible? ie, can i take a cache module from one motherboard and
plug it into another to increase cache memory to 512k?
\_ Absolutely yes, unless the modules are not compatible.
\_ how many computers have you built?? there's no place to
add the L2 cache on most MBs. Plus most pentium/I/II (non-xeon)
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1998/10/5-6 [Computer/HW/Memory, Computer/HW/CPU] UID:14734 Activity:insanely high | 10/5 overclocked my Celeron 300A to 450 MHz. ~jctwu/pub/mendocino.
\_ YouGo Girl
\_ Hey, and I put nitrous in my Yugo!
\_ the new Celerons are very well-engineered and -fab'd. My bet
is that Intel had to cripple them to 66 MHz bus speed so as
not to compete with the Pentium 2. -jctwu
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2012/1/4-2/6 [Computer/HW/Drives] UID:54281 Activity:nil | 1/4 I want to test how my servers behave during a disk failure and
a RAID reconstruction so I want to simulate a hardware failure.
How can I do this in Linux without having to physically pull
a drive? These disks are behind a RAID card and run Linux. -ausman
\_ According to the Linux RAID wiki, you might be able to use mdadm
to do this with something like the following:
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2011/9/14-10/25 [Computer/HW/Drives] UID:54173 Activity:nil | 9/13 Thanks to Jordan, our disk server is no longer virtualized. Our long
nightmare of poor IO performance should hopefully be over. Prepare for
another long nightmare of poor hardware reliability!
...
Just kidding! (I hope)
In any case, this means that cooler was taken out back and shot, and
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2011/2/18-4/20 [Computer/SW/Unix] UID:54044 Activity:nil | 2/18 Why does the system seem so sluggish lately?
\_ Slow NFS is basically always the answer. --toulouse
\_ Any truth to the rumor that soda will be decommissioned this summer?
\_ Absolutely none. Soda might go down temporarily while disks are
reorganized and stuff so soda doesn't suffer from such shitty
performance nearly as much, but no, we've gotta maintain NFS and
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2009/7/28-8/6 [Computer/HW/Drives] UID:53216 Activity:nil | 7/28 Does it make sense to defragment disks on VMWare? My 80GB disk
on VMWare isn't really using 80GB, it just uses what it needs.
Will defragment do anything to it?
\_ If you want to speed up disk operation in your VM, it's best to
defragment the disks in your VM, then defragment the disk on your
host machine where the VM files are.
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2009/5/11-18 [Computer/SW/Security, Computer/HW/Drives] UID:52982 Activity:nil | 5/10 I have large spare disks on several machines, all on same net.
How can I combine them into one big visible network file system?
\_ you want either a clustered file system (eww expensive) or look into
smoething like a distributed file system (afs, global fs).
\_ The startup I work for makes a distributed NAS product that's free
for the first four terabytes if you'd like to try it.
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2009/5/2-6 [Computer/HW/Laptop, Computer/HW/Drives] UID:52933 Activity:kinda low | 5/2 I have a 1Gbps switch. It is connected to a SANS RAID-1 with
two WD Green 1T that takes 1Gbps connection, as well as a laptop
that is also 1Gbps. Online benchmarks show *sustained* transfer
rate of about 1/2 of 1Gbps with the WD Green... cool!!! But
in practice, I'm only getting 68Mbps (read SANS->PC file transfer),
far below what I expected. The switch says both devices are using
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2008/12/10-16 [Computer/HW/CPU, Computer/HW/Drives] UID:52220 Activity:moderate | 12/9 Another idea for the CSUA that lets you spend money and maybe get some
cool toys. Instead of buying a beefy server (like say, a massive server
with 20 386DX processors), buy a few cheap machines (like the ones
mentioned below) that have good disks and work on failover / load
balancing. A netscaler or other piece of hardware is complete overkill,
but maybe hacking an OpenBSD box could do the trick. The idea is that
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2008/12/3-8 [Computer/HW/CPU] UID:52157 Activity:kinda low | 12/3 Are any of you CSUA alums working at Intel? Is it possible that we
might be able to hit Intel up for donated/partially donated (reduced
price) Core i7 Xeons when they come out? Who would be a good person
to contact about something like that? We're of course willing to put
out for them - perhaps we'll tattoo an Intel logo on toulouse if that's
what they want :-p -- steven
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2008/11/29-12/6 [Computer/SW/OS/FreeBSD, Computer/SW/OS/VM] UID:52129 Activity:moderate | 11/29 I'm experimenting with virtualization, and as a poor college student
I'm wondering what the best alternatives for virtualization are, and
how best to cut my teeth on messing with non-linux platforms (or I
guess interesting stuff on Linux would work too). Right now I've got
FreeBSD7 running on KVM on my home computer (on a Core 2 Quad), and am
somewhat at a loss as to how to use it. (More details: bridged
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2008/11/11-26 [Computer/Domains, Computer/HW/Drives] UID:51909 Activity:nil | 11/11 I want a home nas so my laptops aren't always running out of space,
what's a good buy?
\_ I did a bunch of research and ended up with Dlink DNS-321. It
is newer than DNS-323 with less problems. It doesn't have as
much buffer as DNS-323, but if you're transfer files bigger
than 32 megs, the sustained rate for both are equivalent. I
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