Berkeley CSUA MOTD:Entry 44943
Berkeley CSUA MOTD
 
WIKI | FAQ | Tech FAQ
http://csua.com/feed/
2024/11/27 [General] UID:1000 Activity:popular
11/27   

2006/10/24-26 [Computer/HW/CPU] UID:44943 Activity:nil
10/24   Why does hyperthreading slow things down?  I can imagine why it may not
        be faster than a one-thread CPU (maybe too many bottlenecks), but how
        can it be even slower than a one-thread CPU?
        \_ When two procs are doing the same thing, they'll gain no benefit
           from HT and HT simply adds overhead.  Two dissimilar procs will do
           well.
           \_ (Where pp says 'proc', read 'process', not 'processor')
        \_ Useless overhead.
           \_ Did Intel not test its own design before releasing it to the
              market?
              \_ Of course they did.  In most circumstances HT is worth using
                 but for some applications it is just overhead and should be
                 disabled.  *In general* HT is good for applications where UI
                 responsiveness is more important than shaving over a few
                 microseconds or increasing FPS by 1.5.  It is bad for a
                 situation where your single threaded application is cpu
                 bound and the only process running on a machine.  There are
                 many other in between cases of course and YMMV but overall
                 HT is a good thing and should be turned on unless you know
                 it will hurt your use.  Profile and test if you care.
                 \_ We found the opposite. We found that in most instances
                    HT hurt performance and so by default we turn it off.
                    YMMV.
                    \_ What was Intel thinking???
2024/11/27 [General] UID:1000 Activity:popular
11/27   

You may also be interested in these entries...
2009/8/6-14 [Computer/SW/OS/OsX] UID:53250 Activity:moderate
8/5     Why is Mac OS 10.6 $29 and 10.5.6 $129? Is it a typo?
        \_ $29 for existing users.
           \_ it doens't even support ppc does it.
              \_ who cares about ppc anymore? Everything is Intel based
                 \_ I have a PPC mini at home that I use.
                 \_ I have a quad core G5 ppc.
	...
2009/6/1-3 [Computer/HW/CPU] UID:53068 Activity:high
5/31    History of winners and losers by *popularity*:
        VHS > Beta Max
        USB2 > Firewire
        x86 > PowerPC > Everything Else > DEC Alpha > Itanium
        BlueRay > HDDvd
        \_ It's too early to tell RE: "Blue"Ray. They may both turn out to be
	...
2009/5/26-30 [Computer/HW/CPU] UID:53045 Activity:nil
5/26    Engineering is HOT man! Super hot co-inventor of USB at Intel:
        http://www.youtube.com/watch?v=jqLPHrCQr2I
	...
2009/1/16-23 [Computer/HW/CPU] UID:52404 Activity:nil
1/16    AMD to layoff 9%, suspend 401(k) match, cut engineer salaries 10%
        \_ Awwww, too bad                                       -Intel
           \_ My heart bleeds for you. --transmeta.
              \_ Wait, another sodan worked there? --ex-transmeta
                 \_ Hello transmeta-coward, meet another transmeta-coward.
  http://www.theregister.co.uk/2009/01/16/amd_q1_2009_job_cuts_wage_reductions
	...
2008/12/4-10 [Computer/HW/CPU, Computer/HW/Drives] UID:52163 Activity:nil
12/4    A question to you old crufy alumni: So lately we've suggested
        VMs, and been asked why it's necessary. We've suggested top-of-the-line
        hardware and been told we don't need that much power. So I'd like to
        ask -- what exactly do you think the CSUA is supposed to _be_?
        \_ Noone said VMs weren't needed.  They suggested you use the
        \_ No one said VMs weren't needed.  They suggested you use the
	...
2008/12/4-10 [Computer/HW/Memory, Computer/HW/Drives] UID:52172 Activity:nil
12/5    What would you guys think of this?
        TYAN Tank barebone
        http://tyan.com/product_barebones_detail.aspx?pid=353
        2x Intel Quad Xeon E5420
        http://www.newegg.com/Product/Product.aspx?Item=N82E16819117147
        16GB ram
	...
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
	...
2008/11/12-26 [Computer/Companies/Google, Finance/Investment] UID:51948 Activity:low
11/12   Intel warns.  Q4 revenue forecast down 10%.  At 1996 levels.
        GOOG afterhours at 285.  Time to buy?
        \_ I think GOOG is a buy under $300 and I bought. --GOOG h8ter
           \_ how long are you holding for?  will you buy more if it gets
              cheaper?
              \_ I'll hold until I need the money, however long that
	...
2008/11/14-26 [Computer/SW/Languages/Java, Computer/SW/OS/Solaris] UID:51970 Activity:moderate
11/13   http://sfgate.com/cgi-bin/article.cgi?f=/n/a/2008/11/14/financial/f051352S72.DTL
        http://preview.tinyurl.com/6nngpm
        Sun Microsystems Inc. plans to cut up to 6,000 jobs, or 18 percent of
        its global work force, as sales of its high-end computer servers have
        collapsed.  The drastic move announced Friday highlights Sun's
        desperation to cut costs and survive as an independent company. Sun's
	...