I***a
发帖数: 704 | 1 1.14 [10/10/20/20] <1.10> Your company has just bought a new dual Pentium
processor,
and you have been tasked with optimizing your software for this processor.
You will run two applications on this dual Pentium, but the resource
requirements
are not equal. The first application needs 80% of the resources, and the
other only
20% of the resources.
a. [10] <1.10> Given that 40% of the first application is parallelizable,
how
much speedup would you achieve with that application if run in isolation?
... 阅读全帖 |
|
w*r
发帖数: 2421 | 2 let's say you have a abstract class and it will be inherited by
some other classes in the same package, here is a abstract function that
all extended class should have to make it work .As you can read from the
following example, all vehicles should have mechanism to speedup and slow
down , however, speedup and slowdown are two "internal" mechanisms, which
each type of vehicle may carry differnet public function to trigger speedup
or slowdown, such as applyMoreGas() for car, peddleFaster() for bi |
|
b****g
发帖数: 4933 | 3 此文由 moshido 发表：
从网友前线看到的:
去年的时候，凯迪总舵主牧沐的一个国粉朋友在台湾旅游拍照，被诬为间谍遭逮捕
。于是他在凯迪发帖为声援朋友说明其人情况，结果凯迪众接受不了任何对WW民煮的一
丁点抹黑，纷纷表示信任WW的结论，信任WW的做法，柿油的就是好的，真相一定是牧沐
那朋友一定是隐藏的共谍，甚至更质疑牧沐此举转弯抹角遮掩点是上当，赤裸的说就是
背叛了柿油民煮。
最后牧沐愤怒之下，说了句大意是中国人在国外的名声就是你们这帮自虐
狂给虐出来的，这下可捅了马蜂窝，牧沐成了大中国沙文主义者（猫眼众里罪恶莫过于
此，祖国？它们需要祖国干嘛？提祖国即愚民即落后即不够pussy即被抛弃中国劣根论
丑陋的中国人方是正道），过去的种种被数落出来论证牧沐此举是对柿油民煮潜意识里
的抵制，共产主义民族主义思想尾巴割得不过，大有要对其进行思想拯救的架势。对这
群状若疯狗的逗士，牧沐本人只好狼狈败退了。
此文由 klonoa1121 发表：
本贴由【speedup】于2010-05-09 12:20:27发表。该贴仅代表【speedup |
|
i******r
发帖数: 1175 | 4 鱉完成的這量子計算模擬落後有10年了吧。量子計算領先梯隊裏沒有中國團隊。沒有一
樣重要研究成果是中國人的。
Timeline[edit]
Main article: Timeline of quantum computing
In 1959 Richard Feynman in his lecture "There's Plenty of Room at the Bottom
" states the possibility of using quantum effects for computation.
In 1980 Paul Benioff described quantum mechanical Hamiltonian models of
computers[57] and the Russian mathematician Yuri Manin motivated the
development of quantum computers.[58]
In 1981, at a conference co-organized by MIT and IBM, physicist ... 阅读全帖 |
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s******d
发帖数: 9806 | 5 能介绍一下speedup的方法么，谢谢啦！
speedup |
|
h*******6
发帖数: 3228 | 6 才知道俺买的老陈醋都是假的， 如图左边的那瓶。 好像Portland的亚洲超市卖的都是
图左一样的老陈醋。
【 以下文字转载自 NewJersey 讨论区 】
发信人: orientcrazy (SpeedUp), 信区: NewJersey
标 题: 在555发现假山西老陈醋 (转载)
发信站: BBS 未名空间站 (Sat Sep 29 21:34:24 2012, 美东)
发信人: orientcrazy (SpeedUp), 信区: Food
标 题: 在555发现假山西老陈醋
发信站: BBS 未名空间站 (Sat Sep 29 21:32:51 2012, 美东)
今天打开刚买的醋吃饺子, 起初发现在碗里颜色看起来比较淡.
没多想夹着饺子蘸起来就吃, 我立马就被呛了一下. 我还没意识到有问题, 以为是太
贪了吃得太快.
夹第二个饺子进嘴之前闻到一股刺鼻的味道, 觉得有问题.
然后和以前一瓶剩下的比一比, 觉得这瓶有问题, 立马狂喝水把家里能喝的水全喝完了.
第一,想起大家提一个醒.
第二,想问一问有没有若何鉴别真假货的方法. 美国超市里有没有可靠的替代产品? 我
怀... 阅读全帖 |
|
y**b
发帖数: 10166 | 7 很有意思，比如12 cores的工作站，运行多线程的计算：
1. HT enabled -> 24 logical processors:
运行多线程的单程序，给12 threads达到最大speedup，给24 threads反而变慢。
2. HT disabled -> 12 logical processors:
运行多线程的单程序，给12 threads, speedup比上面略低，而且基本无法运行其他程
序。
如果运行多个多线程程序，HT的优势更明显。 |
|
y**b
发帖数: 10166 | 8 8节点的小模拟简单比较过，speedup=4, efficency=0.5，这个也没太大意义，主要是计
算量相对通讯量还不够大，纯粹测试计算稳定性用的。
1000节点的唯一一次运算的输出没有串行时间比的信息，而且运算量/通讯量的比值随着
进度增加很大，现在还很难估算，我估摸scaled speedup能到800以上。 |
|
|
s******u
发帖数: 501 | 10 72个核心，然后每个核心是4个线程，硬件上只有一个instruction dispatcher，但是
有四个data dispatcher，所以理论上对SIMD还是能有不错的并行度。这样子总共280个
线程，怎么的我也指望能有100-140x之间的speedup吧
我用来测试的是PIC算法里面的charge deposition，32核心的CPU，MPI可以到30x。
BlueGeneQ，20000个核心基本可以到80-90%的效率，差不多16000x的speedup |
|
t*s
发帖数: 10 | 11 MMX provide some special instructions to fast small
integer operation. The design is mostly following
VLIW (very large instruction width). One shortcut
Intel take is use the 64 floating point register,
therefore it can execute four short integer ops
in one cpu cycle (the maximum speedup).
You should be able to find these information from
INTEL, there are some papers regarding the speedup
of MMX tech in term of MMX application. Not very
impressive, average 30% fast, some even suffer. |
|
t******a
发帖数: 408 | 12 我在
http://www.mitbbs.com/article_t/MedicalCareer/31531335.html
中提到如何搞定病理, 比较Pathoma 和 RRP, 以及使用的策略.
下面是另一部分体会:
2.关于题库 (try to master the principle)
3.考试的一些考点
学习题库
(1). UW qbank – online [教训!!!!!, 只完成了70%, ~ 74% correct -----get
refund for the unused 30% from UW]
(2). USMLERx qbank – online [汗, 只完成了75%,]
1. UW 题库 ----一定要尽早开始做.
如果能重来一次, 我会学习一章/科, 做UW对应一章/科的题目(分科做), 这是第一遍.
待全部学完一遍后, 用timed+mixed 评估学习+检测漏洞.
我的教训是没有早做UW. UW在它的欢迎页上就写得一清二楚 ----- UW目的是为了提高
你的学习水准. 是用来教你学习的题库. 很遗憾我(也许还有其他同学)没有早明白这一
点. U... 阅读全帖 |
|
t******a
发帖数: 408 | 13 我在
http://www.mitbbs.com/article_t/MedicalCareer/31531335.html
中提到如何搞定病理, 比较Pathoma 和 RRP, 以及使用的策略.
下面是另一部分体会:
2.关于题库 (try to master the principle)
3.考试的一些考点
学习题库
(1). UW qbank – online [教训!!!!!, 只完成了70%, ~ 74% correct -----get
refund for the unused 30% from UW]
(2). USMLERx qbank – online [汗, 只完成了75%,]
1. UW 题库 ----一定要尽早开始做.
如果能重来一次, 我会学习一章/科, 做UW对应一章/科的题目(分科做), 这是第一遍.
待全部学完一遍后, 用timed+mixed 评估学习+检测漏洞.
我的教训是没有早做UW. UW在它的欢迎页上就写得一清二楚 ----- UW目的是为了提高
你的学习水准. 是用来教你学习的题库. 很遗憾我(也许还有其他同学)没有早明白这一
点. U... 阅读全帖 |
|
|
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s*x
发帖数: 8041 | 16 Their claimed speedup over classical algorithms appears to be based on a
misunderstanding of a paper my colleagues van Dam, Mosca and I wrote on "The
power of adiabatic quantum computing." That speed up unfortunately does not
hold in the setting at hand, and therefore D-Wave's "quantum computer" even
if it turns out to be a true quantum computer, and even if it can be scaled
to thousands of qubits, would likely not be more powerful than a cell phone. |
|
S********a
发帖数: 359 | 17 高速上超速被抓，80/65，警察说只给parking ticket，plea not guilty后，收到信说要我去法庭。
那个抓我的警察会出庭吗？
见了法官我要说的如下：
I was driving on left lane at 70. The SUV behind me was very fast and stayed close to me, I felt not comfortable and speedup to change to the right lane, that is the moment I was caught. The police understood my situation and said that he would give me a parking ticket.
5个月前还有一次高速上超速，当时就认罪付钱了，4年多驾照那是第一次被抓超速。从此后就很小心，这次是挺倒霉的。以前的超速历史会不会让法官不相信我这次呢？第一次出庭，请大家帮我看看，谢谢 |
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a**********m
发帖数: 2098 | 18 parking ticket?
not speeding ticket?
说要我去法庭。
stayed close to me, I felt not comfortable and speedup to change to the
right lane, that is the moment I was caught. The police understood my
situation and said that he would give
从此后就很小心，这次是挺倒霉的。以前的超速历史会不会让法官不相信我这次呢？第
一次出庭，请大家帮我看看，谢谢 |
|
D****r
发帖数: 309 | 19 Could be like this:
The truck was on the left fast lane, but the FOCUS behind was not patient to
wait, it just choose to take over from right lane, but at the moment, the
track decided to give way to FOCUS and shifting to right.
Meanwhile, focus was speeding up to change lane. So its driver side crash
into the right back corner of the truck. The tragedy happened.
Just back from a long trip in Italy. Truck drivers are sometimes very
aggressive during longtime driving, They don't even give you the... 阅读全帖 |
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发帖数: 1 | 20 Senior IOS/Android Software Engineer
Job Description
Recruiting highly qualified Senior IOS/Android Software Engineers to
help in the continued expansion of our AI/AR applications. We are looking
for intelligent, enthusiastic engineers, with Bachelor’s degree in computer
science or computer engineering, or equivalent experience. Your primary
focus will be the development of IOS/Android applications and their
integration with different AI/AR services. You will be working alongside
other engin... 阅读全帖 |
|
A******y
发帖数: 2041 | 21 Only the last step (USCIS Processes H-1B Petition) can be speedup. You are
looking at 3 months minimum.
流。 |
|
h***r
发帖数: 726 | 22 下面这个有线性解吧。
对原体来说，可能应该对长度循环： total time complexity O(n log^2 n). assume
tree
is balanced.
长度为1： 退化为search, trival, O(logn)
长度为2：
let's say the input is x, we use t.v, t.left.v t.right.v for the value at
node t, t.left, t.right
从根遍历树(using a queue)，但是加上下面的一些speedup:
init: q.push_back(root), t = q.pop()
a = t.v + t.left.v
b = t.v + t.right.v
if (x < a) {
push_back(t.left);
} else if (x == a) {
output this path;
push_back(t.left.right);
} else if (x betwen a, b) {
pus |
|
y****n
发帖数: 579 | 23 既然不是学cs的，不必知道什么‘cat /proc/cpuinfo’。
写个multithreading的程序，用speedup估计? |
|
j********x
发帖数: 2330 | 24 1. Comp. Arch., An app takes 20% transferring data and 80%
time do the computing. What is the maximum possible speedup
if we can find new machine.
2. Given a struct of "employee" sort them according to their
years of joining the company.
3. What is hash table.
4. how to handle collision in a hash table.
5. Given a hash table of 16 buckets, inserting 8 items,
what's the probability that the last element gets no
collision.
6. Design a class for quantum bit. 这个很麻烦，没太听懂这个
quntum bit怎么工作的。。。
最后问了一下要几... 阅读全帖 |
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g*********s
发帖数: 1782 | 25 i don't see speedup by your approach. |
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f********1
发帖数: 24 | 26 最近电面的R&D部门的一道题目。题目很简单。和大牛们讨论下。
optimize the following code to speedup.
for(i=0;i
a[i] += c*b[i];
电面的人说有好些优化的办法，比如SIMD。
SIMD不懂，其他的优化也没有想到。大牛们说下用SIMD怎么优化，其它优化办法呢？ |
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d*****1
发帖数: 263 | 27
我不要求数学原理，最简单的做除法，用个while就行。（有点儿小tricky可以speedup
些）
或者你给个hashmap我也认了。
一个老白，就是没有思路。只会用if else。
问题是这样，我提前告诉老白了，题目会很简单， 就像is power of 2.
我都快哭了。真的不能再给他简单了。
后来给出了道2sum，人家直接放弃了。
人还是老板推荐的。面试时老板恰恰就在旁边。
老板本来想要的，被我坚决顶回去了。 |
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z***m
发帖数: 1602 | 28 一是local而且之前面过，表现还不错。第二可能是，刚面了其他对手公司，要求
speedup，跳过电面直接onsite。 |
|
发帖数: 1 | 29 Senior IOS/Android Software Engineer
Job Description
Recruiting highly qualified Senior IOS/Android Software Engineers to
help in the continued expansion of our AI/AR applications. We are looking
for intelligent, enthusiastic engineers, with Bachelor’s degree in computer
science or computer engineering, or equivalent experience. Your primary
focus will be the development of IOS/Android applications and their
integration with different AI/AR services. You will be working alongside
other engin... 阅读全帖 |
|
|
K****n
发帖数: 756 | 31 少去人多、空气不流通的公众场合，mall啊什么的，我ped说公园什么的ok，还有少让
陌生人接触，有咳嗽的一定要躲开。加州speedup了打百日咳疫苗了把，我们４个月就
打了第三针了。 |
|
g**k
发帖数: 26 | 32 0. 320GB HD.
1. disable all unnecessary services. Google tweak xp/xp speedup you'll know.
especially, task scheduler, themes, TVT Scheduler, Volume Shadow Copy
services, Java Quick Starter service.
2. Get rid of all Adobe software.
3. thinkpad services leaving only power management and HD protection.
4. Tried defrag C: -b. Shortened boot up Windows screen from 33.8 sec. to
about 18 sec.
5. • disabled unused drivers, (infrared, PCMCIA, extra monitors,
modems, ...)
• No page file. Set |
|
L*****y
发帖数: 4290 | 33 F回去仔细看. thx
0. 320GB HD.
1. disable all unnecessary services. Google tweak xp/xp speedup you'll know.
especially, task scheduler, themes, TVT Scheduler, Volume Shadow Copy
services, Java Quick Starter service.
2. Get rid of all Adobe software.
3. thinkpad services leaving only power management and HD protection.
4. Tried defrag C: -b. Shortened boot up Windows screen from 33.8 sec. to
about 18 sec.
5. • disabled unused drivers, (infrared, PCMCIA, extra monitors,
modems, ...)
• No pa |
|
k****a
发帖数: 4944 | 34 http://www.giveawayoftheday.com/?01/21
•One Day Only.
WinUtilities 9.3 Pro
WinUtilities is an award winning collection of tools to optimize and speedup
your system performance. This suite contains utilities to clean registry,
temporary files on your disks, erase your application and internet browser
history, cache and cookies.
WinX DVD Ripper Platinum
WinX DVD Ripper Platinum is proved to be the fastest DVD ripper software to
convert DVD movies to popular video and audio formats, including |
|
发帖数: 1 | 35 他说
ES is able
to achieve linear speedup in the number of CPU cores.
那用 GPU core 更好了 |
|
c******a
发帖数: 4400 | 36 女大 claims they can do faster than Moore's law growth for GPU computing in
the next decade. circa 1000 time speedup |
|
|
r****n
发帖数: 709 | 38 The processing time difference can be huge. Recently it seems that if you
file I140 and I485 together will speedup the processing. |
|
M******l
发帖数: 273 | 39 one has green card, the other is on H1b/485
was there any recent change of Greencard policy that would speedup the
spouse's application? thanks |
|
y**c
发帖数: 447 | 40 First of all, Thank you all !
Background:
phd:2009 US, now postdoc, cs
paper 12, citation > 30, review > 30, all in English, few first authored but almost all in alphabetical order due to the area convention. Have some conference talks and a patent pending and one paper used in a course. Four independent letters: 1 US, 3 abroad.
Hired a lawyer, claimed review, authorship and contribution
timeline:
efile+pp, 2/24
lud: 2/28,3/1,3/2
approved, 3/8
485 concerns:
my position will end in less than 4 mo... 阅读全帖 |
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y********t
发帖数: 122 | 41 cong
First of all, Thank you all !
Background:
phd:2009 US, now postdoc, cs
paper 12, citation > 30, review > 30, all in English, few first authored but
almost all in alphabetical order due to the area convention. Have some
conference talks and a patent pending and one paper used in a course. Four
independent letters: 1 US, 3 abroad.
Hired a lawyer, claimed review, authorship and contribution
timeline:
efile+pp, 2/24
lud: 2/28,3/1,3/2
approved, 3/8
485 concerns:
my position will end in less tha... 阅读全帖 |
|
l******t
发帖数: 2243 | 42 congrats. according to TSC's website, the processing time is July 24, 2010?
发信人: yacc (yacc), 信区: Immigration
标 题: eb1b+pp approved, no rfe, and 485 concerns
发信站: BBS 未名空间站 (Wed Mar 9 16:11:11 2011, 美东)
First of all, Thank you all !
Background:
phd:2009 US, now postdoc, cs
paper 12, citation > 30, review > 30, all in English, few first authored but
almost all in alphabetical order due to the area convention. Have some
conference talks and a patent pending and one paper used in a course. Four
... 阅读全帖 |
|
C*Y
发帖数: 679 | 43 cong！
First of all, Thank you all !
Background:
phd:2009 US, now postdoc, cs
paper 12, citation > 30, review > 30, all in English, few first authored but
almost all in alphabetical order due to the area convention. Have some
conference talks and a patent pending and one paper used in a course. Four
independent letters: 1 US, 3 abroad.
Hired a lawyer, claimed review, authorship and contribution
timeline:
efile+pp, 2/24
lud: 2/28,3/1,3/2
approved, 3/8
485 concerns:
my position will end in less th... 阅读全帖 |
|
|
l**h
发帖数: 893 | 45 Speedup PERM, let's do the following together:
1. Most importantly: Contact Dr. William L. Carlson and Senator Tom Harkin's
offices, explain why the delay and the increased audit rate are hurting us,
ask them if there is a room to improve. Better to use all the methods
including Call, Fax, Snail mail and Email if possible. Only sending out an
email is the easiest, but it's probably the least useful one.
Note: we want to give them some pressures, but definitely don't want to
offend them, so pleas... 阅读全帖 |
|
t*******t
发帖数: 225 | 46 看了lush发的这个petition的帖子
http://www.mitbbs.com/article_t/EB23/32066131.html
我也签了，而且看了后面的很多回复，说一点自己的想法
0.首先谢谢Speedup Perm发起这个petition，以及感谢所有支持的同仁，大家利用此机
会互相帮助。
1.这个petition就是最起码的民主平台，by law这是大家发出支持自我和同胞声音的合
理平台，所以无论PERM过还是没过，是否Audit，只要对这个Audit的制度有意见，请尽
量去发声
2.也因为这是一个民主的平台，涉及大家自身的利益和平台，请认真填写comment。我
不清楚是否每个comment都会被诉诸的人看到，但这代表我们的一个态度。
3.我看到很多人的comment里都是在投诉“audit很久了，很久了，不fair，不fair”。
对方看到这个反而乐了“呵呵没错，本来就不想让你们fair的..”再说两句官话，就把
大家打发了。现在你我不是消费者，对方不是客服，也不是慈善家。想发起petition，
要想办法击中所诉诸对象的痛点。我觉得需要说的是：
a. 我是个... 阅读全帖 |
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j*****g
发帖数: 37 | 47 find an American roommate
when you have say English in your daily life,
you will get speedup |
|
o*********y
发帖数: 65 | 48 【 以下文字转载自 Food 讨论区 】
发信人: orientcrazy (SpeedUp), 信区: Food
标 题: 在555发现假山西老陈醋
发信站: BBS 未名空间站 (Sat Sep 29 21:32:51 2012, 美东)
今天打开刚买的醋吃饺子, 起初发现在碗里颜色看起来比较淡.
没多想夹着饺子蘸起来就吃, 我立马就被呛了一下. 我还没意识到有问题, 以为是太
贪了吃得太快.
夹第二个饺子进嘴之前闻到一股刺鼻的味道, 觉得有问题.
然后和以前一瓶剩下的比一比, 觉得这瓶有问题, 立马狂喝水把家里能喝的水全喝完了.
第一,想起大家提一个醒.
第二,想问一问有没有若何鉴别真假货的方法. 美国超市里有没有可靠的替代产品? 我
怀疑这瓶新醋是被稀释后又加一些其它材料来增强其味道.
第三,那里做食品检验, 我想把这瓶醋拿去检验一下.
多谢! |
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