s*****w
发帖数: 1527 | 1 【 以下文字转载自 Programming 讨论区 】
发信人: somehow (要像蟑螂一样的坚强), 信区: Programming
标 题: 大家帮我看看如何设计OS profiling/tracing
发信站: BBS 未名空间站 (Mon Aug 30 21:38:00 2010, 美东)
简单说，要log一下createThread( ), contextSwitch( ),...要花多少时间。
我的想法是
#ifdef LOG
#define createThread createThreadLog
#else
#define createThread _createThread
#end |
|
b*******b
发帖数: 613 | 2 vs2005 new user looking for some helps here. thanks in advance.
i'm trying to debug a program in vs2005. when a break point was hit, i canno
t trace any variable values in "autos" window. i've tried to drag some vars
into "watch" window, there error info comes as "symbol xxx not found". |
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h**********c
发帖数: 4120 | 3 多线程多进程，随机事件
你怎么trace
只能一边tail log, 一边打色子 |
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w***x
发帖数: 105 | 4 log就是app把事件保存到磁盘上，没啥好说的；我理解的trace是send一个message到系
统中去，通常是个ring buffer，在内存中折腾，直到用户有需要才dump到磁盘上... |
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t**********o
发帖数: 124 | 5 a pc(winNT) seems infected by some virus:
Each time when I launch the IE, it will automatically open an Java Applet and
then call a js code(I can see these from the IE status bar). After you close
the browser, Norton prompts: virus found,
C:\winnt\profiles\tutu\.plugin140.trace.
I searched the internet, but found nothing about it.
From the java console, I can see part of code, it has sth. about modifying the
registry values.
Now I can only config the Norton to delete that file each time it finds |
|
kb
发帖数: 73 | 6
You can use tracert to trace it. And you should report it to Verizon. |
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j***y
发帖数: 2074 | 7 anyone knows which gnu tool in unix can trace the function flow (A() calls
B(), B() calls C(), ...) in a C project?
i know VC can make it, but it is in windows.
thanks, |
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b****y
发帖数: 105 | 8 how do you know the machine that you traced to was non-existent instead of
just down or not responding?
Thanks very much |
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d*******d
发帖数: 1341 | 9 ecoli表达蛋白用的，网上的配方有的加trace elements，有的不加。我觉得如果加了
效果应该会好一些？ |
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m******t
发帖数: 109 | 10 我正在做lineage tracing，所有的trans gene都在，可就是染不出蓝色，同时的
positive control是蓝的。各位高手，是否有次类似经验？原因为河？如何解决。 多
谢了。 |
|
m***i
发帖数: 2013 | 11 最近听说有人搞出了一种病毒，可以Anterograde tracing并穿透synapse到达靶细胞。
有没有童鞋知道具体的信息，比方说这是神马病毒？哪个实验室在做？哪里有供应？多
谢多谢！ |
|
v****m
发帖数: 26 | 12 When I run my code, I got a memory dump error. The erroe message is Trace/BPT
trap(coredump). What does it mean? What place could be wrong? Thanks a lot for
your enlighting. |
|
n*******l
发帖数: 2911 | 13 You need some knowledge about those Sobolev spaces to understand the
definition of trace. |
|
H****h
发帖数: 1037 | 14 答案都是肯定。
Trace在正交相似变换下不变。所以你可以假设A是对角矩阵。
A的对角线元素都是非负数。B也是如此。
如果A是满秩，那么A的对角线元素都是正值。
如果B的对角元素都是0，那么检验对角二阶子矩阵，B的其它元素必须都是0。 |
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s*******d
发帖数: 1027 | 15 比如就像determinant是算volume一样， trace是表达一个什么样的概念呢？ |
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m*******s
发帖数: 3142 | 16 线性代数里头有个基本结论，对任意矩阵A和B，有tr(AB)=tr(BA)成立
量子力学的教科书也多处使用该性质，只不过把矩阵换成了算符，而且还推广到多个算
符的情况。
很多时候这个性质对解决问题很重要，可是也有明显不适用的时候。
比如很基本的commutator [x,p]=i\hbar,
展开就是xp-px=i\hbar,两边同时取trace，右边肯定不是0，从而说明tr(xp)≠tr(px)。
我的问题就是当A,B是算符的时候，tr(AB)=tr(BA)成立的充分条件是什么？
请高手帮忙。谢谢！ |
|
w**k
发帖数: 320 | 17 基本上条件就是AB是trace class的就差不多了
)。 |
|
w*******y
发帖数: 60932 | 18 Today I downloaded a bunch of free apps, and the 3 below are the ones I
liked and will keep.
Dark Nova::
http://itunes.apple.com/app/dark-nova/id311548871?mt=8
A cool game that reminds me of a mix of Eve and those old drug dealer
games where you buy low and sell high at various cities. Pretty addictive.
I'm sure other people would be able to compare this to other similar games,
but I'm new to this genre, but I'd give this at least a 3.5/5 rating. Free
today. Previously 5.99.
Tap Trace Pro: |
|
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r******l
发帖数: 10760 | 20 不一样，ray casting每条ray碰到物体就停止了，而ray tracing碰到物体后会产生新
的reflectiong ray和rafraction ray继续走。
看看教科书就应该明白了吧。:) |
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z**o
发帖数: 114 | 21 I see, thanks :) 或者说ray casting 是递归为1的ray tracing? |
|
f**d
发帖数: 768 | 22 这是一本计算神经科学的优秀著作，全文拷贝这里（图和公式缺），有兴趣的同学可以
阅读
如需要，我可以分享PDF文件（－－仅供个人学习，无商业用途）
From Computer to Brain
William W. Lytton
From Computer to Brain
Foundations of Computational Neuroscience
Springer
William W. Lytton, M.D.
Associate Professor, State University of New York, Downstato, Brooklyn, NY
Visiting Associate Professor, University of Wisconsin, Madison
Visiting Associate Professor, Polytechnic University, Brooklyn, NY
Staff Neurologist., Kings County Hospital, Brooklyn, NY
In From Computer to Brain: ... 阅读全帖 |
|
发帖数: 1 | 23 QUANTUM SPACE ELEMENTS (QSE)
INTRODUCTION
This is a non-mathematical proposal introducing a cosmological model that is
cyclic, deterministic and infinity-free. For the purpose of achieving this
objective a number of new concepts are introduced. The framework of this
proposal is structured over a number of assumptions, leading to various
considerations of cosmological concerns. Furthermore, verification methods
are suggested of both, observational and mathematical nature.
ASSUMPTIONS
Space is dis... 阅读全帖 |
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p**p
发帖数: 742 | 24 暴力递归解法：
public List> printFactors(int n) {
List> result = new ArrayList>();
if(n <= 0) {
return result;
}
List trace = new ArrayList();
printFactorsHelper(n, trace, result);
return result;
}
private void printFactorsHelper(int n, List trace, List
Integer>> result) {
List list = new ArrayList(trace);
if(list.isEmpt... 阅读全帖 |
|
d**********o
发帖数: 1321 | 25 最终版本的compiler测试结果
=================================================
Output of Building User Code
Explode the tar
c-.l
c-.y
scanType.h
makefile
symtab.h
symtab.cpp
emitCode.h
emitCode.cpp
20131214164956-huang-CS445-F13-A5.tar: POSIX tar archive (GNU)
Tests: directory
c-.l: lex description text
c-.y: lex description text
emitCode.cpp: ASCII C++ program text
emitCode.h: ... 阅读全帖 |
|
d**********o
发帖数: 1321 | 26 最终版本的compiler测试结果
=================================================
Output of Building User Code
Explode the tar
c-.l
c-.y
scanType.h
makefile
symtab.h
symtab.cpp
emitCode.h
emitCode.cpp
20131214164956-huang-CS445-F13-A5.tar: POSIX tar archive (GNU)
Tests: directory
c-.l: lex description text
c-.y: lex description text
emitCode.cpp: ASCII C++ program text
emitCode.h: ... 阅读全帖 |
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j*****n
发帖数: 1545 | 27 // A is a list
def f(A):
A[-1] 怎么怎么样....
// call f
f ( trace[1:] )
我觉得这个函数调用就是只调用一次吧，不过那程序的意思好像是 调用n次。
第一次是 f[ trace[0] ]
第二次是 f[ [trace[0], trace[1]] ]
第三次是 f[ [trace[0], trace[1], trace[2]] ]
....
python 有什么好的 tutorial 啊， 我从 java c++ 转过去的。 |
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N*n
发帖数: 456 | 28 谢谢。。找了点code在看。。
public class StackTraceExample
{
//private static final Logger logger = Logger.getLogger(StringReplace.class.
getName());
public static void main(String args[])
{
//calling a method to print stack trace further down
first();
}
public static void first()
{
second();
}
private static void second()
{
third();
}
private static void third()
{
//If you want to print stack trace on console than use dumpStack() method
System.err.println("Stack trace of current thread using dumpStack() ... 阅读全帖 |
|
m*****3
发帖数: 13701 | 29 是吧，那你咋这么几天就开了这么老多帖子问涅？转向灯和AC修好了？
1 * tracing Aug 9 【包子】右转灯跳的快可能是啥坏了见视频
2 * tracing Aug 9 【包子】停车等红灯的时候车抖的厉害加速吃力是
啥情况
3 * tracing Aug 21 车读了一下代码有7个code
4 * tracing Aug 24 ABS灯亮了要修吗？
5 * tracing Aug 30 刚换了O2 sensor引擎灯又亮了个P0139
6 * tracing Aug 30 Right Front Wheel Speed Sensor 坏了要换吗 |
|
J*******g
发帖数: 8775 | 30 两个福音书中家谱的不同有很多讨论。你大可不必把自己知道的东西都说成别人不知道
的。然后开始贬低别人。我经常很奇怪这样做到底有什么意义呢？
NET bible:
1:2-6aIn tracing Jesus’ genealogy, why did Matthew begin with Abraham
rather than with Adam, as Luke did? Matthew wanted to show Jesus’ Jewish
heritage, and to do this he only needed to go back as far as Abraham, the
father of the Jewish race. Significantly, Matthew called him Abraham rather
than Abram. The longer name connotes the covenant privileges that God made
to Abraham when He changed his name.
The writer sepa... 阅读全帖 |
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m******l
发帖数: 613 | 31 我在用java写一格东东，有个算法不会写，只找到了别人用c写的代码
但转换的时候发现如下问题，想烦请各位高手指点一二
int* beam,*scp,*tmx;都是当数组用（我在java中定义了int beamidx, scpidx, tmxidx
）
1.beam += y + icm[y].offset;(icm是我自己定义的一个istate数组，offset是一个整型
元素)
2. *scp=*beam+*tmx;
3.trace类的构造，我构造tracestack开始的时候用如下代码
trace[] list=new trace[10];
然后再在tracestack的构造函数中写道：
for(int i=0; i<10; i++) list[i]=new trace();
但这样每次都会报错java.lang.stackoverflow,后来只好把这一句屏蔽掉
4。int[][][] amx
beam=amx[diff][0]+y+icm[y].offset; 这句话什么意思，怎么转换
trace定义如下
class trace {
public int emitl=0; |
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m*****n
发帖数: 1631 | 32 这个圣诞节，游戏卡市场乱七八糟，有AMD老版卡，女大老版卡，矿场退出来的女大二
手老版卡，矿场退出来的AMD二手老版卡，再就是女大的新版Turing卡。
过了年，老黄不至于还继续卖积压的Pascal卡，随着新版游戏陆续推出，应该是Turing
卡唱主角了。按摩店听说正在做7nm的新版卡，问题是，老黄的新卡有ray tracing，各游
戏商的新版游戏配合老黄用到ray tracing，苏妈的新版卡如果没ray tracing那就很难
卖了。老黄想用Turing的Ray Tracing给苏妈致命一击，把按摩店彻底挤出游戏卡市场
，直到按摩店把ray tracing做出来，这之前游戏卡市场只剩女大一家玩了，老黄够黑
。 |
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r*****e
发帖数: 7853 | 33 那老黄的q4 guidance为什么这么低？
[在 mexican (走神) 的大作中提到：]
:这个圣诞节，游戏卡市场乱七八糟，有AMD老版卡，女大老版卡，矿场退出来的女大二
:手老版卡，矿场退出来的AMD二手老版卡，再就是女大的新版Turing卡。
:过了年，老黄不至于还继续卖积压的Pascal卡，随着新版游戏陆续推出，应该是
Turing卡唱主角了。按摩店听说正在做7nm的新版卡，问题是，老黄的新卡有ray
tracing，各游
:戏商的新版游戏配合老黄用到ray tracing，苏妈的新版卡如果没ray tracing那就很
难卖了。老黄想用Turing的Ray Tracing给苏妈致命一击，把按摩店彻底挤出游戏卡市场
:，直到按摩店把ray tracing做出来，这之前游戏卡市场只剩女大一家玩了，老黄够黑
:。 |
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s*****o
发帖数: 1459 | 34 From youtube:
An elegiac song popular in the Soviet era. It is not a lament, it is rather
a song of wisdom looking back at its youth. "Everything leaves traces on
this earth, and our bygone youth is immortal. How young we were! How
earnestly we loved and believed in ourselves". The beauty and wisdom of
Russia lies in its peoples of all nationalities. This is why I chose
photographs of ordinary Russians to accompany this lovely song. Not
everything in the Soviet time was evil. Indeed, many young ... 阅读全帖 |
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w*******y
发帖数: 60932 | 35 Link:
http://www.amazon.com/Vibrant-Health-Green-Vibrance-Family/dp/B
$41.90 with Subscribe & Save - Free Shipping
The cheapest I've seen this for is the current price, which is 49.29, and
this is the first time I've seen it eligible for subscribe & safe... 25
billion probiotics per serving.
Excellent product - check out the reviews.
Green Vibranc
The Greatest Food on Earth
* The #1 Green Food in the Country!
* Nutritional Powerhouse
* Loaded with trace nutrients
* Supports healt... 阅读全帖 |
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l********e
发帖数: 4863 | 36 昨天去画画课接学了两年画画的老大，一夜回到解放前。。。。发现娃trace了一本个
仙女图。问题是家里一堆自己画的仙女，我觉得比描着画的好看多了。
娃说老师一个半小时指点了两次如何trace，其他在管别的孩子。课上大孩子小孩子混着一共也没几个。老师自己
说，trace也很练习呀，她trace的很专注，还可以学习构图。。
我郁闷,在家很多fairy书，自己trace不好么 |
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T*********I
发帖数: 10729 | 37 A new gun law proponents say helps law enforcement has driven Smith & Wesson
and Sturm Ruger out of California, and affirmed the suspicions of firearms
rights advocates that the measure is really about making handguns obsolete.
The two companies have announced they will stop selling their wares in the
nation's most populous state rather than try to comply with a law that
requires some handguns to have technology that imprints a tiny stamp on the
bullet so it can be traced back to the gun. The co... 阅读全帖 |
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s*****D
发帖数: 58 | 38 刚从一个州搬到另一个州, 要在新的州注册车。注册车要提供VIN的证明. 方法是用透
明纸(tracing paper) 和铅笔去制备一个VIN的 tracing. 我很迷惑, 因为找到的vin都
是印在一个平面上的. 所以想求教大牛应该如何制备这个VIN的 tracing? 多谢了！
关键字: VIN, tracing, registration |
|
S**I
发帖数: 15689 | 39 ☆─────────────────────────────────────☆
happymermaid (娆) 于 (Wed Apr 6 14:03:00 2011, 美东) 提到:
加recruiter一共6人
4个白男，午饭是一个组的经理 像是 土耳其／印度？ 人
除了最后一个都比较nice
另外每个人有时间都问一遍我RA做的项目，说到想吐
1. java keyword
实现浮点数的平方根，经提醒搞出来了。要考虑小于1的特殊情况； 还要想time
complexity，相对于小数点后精确位数算如何时间复杂度
2. paint fill (toggle)。关键是要考虑space complexity，主要是method stack实时
一共有多少
说了组里的相关一个问题，大概说说TRIE，有一个improvement方法不好答，他说的
用一个计算load balance function，我吐
午饭是其中一个经理，详细讲了下组里的东西，基本和我做的有点相关，感觉他们招人还是很看背景的
3. 给一个数据结构数组，（parent, child）， 重建二叉数，... 阅读全帖 |
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y********n
发帖数: 132 | 40 谢谢大家！查了中文网说
对延误行李进行赔偿的乘客至迟应当自托运行李交付给乘客之日起21天内向国航提交书
面索赔申请。 (我就剩下一两天)
诉讼必须在飞机抵达目的地（如抵达）后两年内结案，或在相关航班被撤消之前结案，
否则诉讼将被撤销。
行李延误的一次性赔偿金额为：经济舱300元人民币（或等值外币），公务舱400元（或
等值外币），头等舱500元（或等值外币）。
美国网站写
Baggage Tracing
Due to its limitations, the baggage tracing system can only recognize
English letters. So, if your baggage delivery address changes, please revise
your address in English. You can also call Air China’s baggage tracing
unit about the change.
“Enter “Global Baggage Tracing System”"然后查到这个网站说. 您所搭乘... 阅读全帖 |
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b******9
发帖数: 425 | 41 娃经常拿回来白天做的作业，很多都是trace字母，能看出来trace好的多半是老师给她
做示范，其他的都乱涂，惨不忍睹。
我们也不知道究竟多大的小孩应该学会trace，不过在当当上看到两三岁的小孩的描画
书，确实有很多trace的内容啊，所以以为是自己的娃太落后了：（ |
|
s*****D
发帖数: 58 | 42 刚搬到宾州, 要在宾州注册车。注册车要提供VIN的证明. 方法是用透明纸(tracing
paper) 和铅笔去制备一个VIN的 tracing. 我很迷惑, 因为找到的vin都是印在一个平
面上的. 所以想求教大家应该如何制备这个VIN的 tracing? 或者有什么替代方法? 多
谢了！
关键字: VIN, tracing, registration |
|
x*r
发帖数: 11073 | 43 Scan完了，我来跟同学们汇报一下结果：
1，Adware.Agent File
2, Trojan.Fake Alert File
3, Malware.Trace Folder
4, Malware.Trace File
5, Malware.Trace File
6, Malware.Trace File
然后remove selected是不是就可以了呢？还要做别的吗？ |
|
k****i
发帖数: 1072 | 44 1. For example:
public class BaseClass
{
public virtual void TraceSelf()
{
Trace.WriteLine("BaseClass");
}
}
public class SubClass:BaseClass
{
public override void TraceSelf()
{
Trace.WriteLine("SubClass");
}
}
BaseClass obj=new SubClass();
obj.TraceSelf(); //What's the output here?
public class BaseClass
{
public virtual void TraceSelf()
{
Trace.WriteLine("BaseClass");
}
}
public class SubClass:BaseClass
{
public new void TraceSelf()
{
Trace.WriteLine("SubClass");
}
}
BaseClass obj=new |
|
c**t
发帖数: 2744 | 45 在如下的代码中，finish try block, caught exception or in finally block 没有
一个
执行的．myEventDlg 倒是执行完毕．
try
{
Trace("in try block");
if( myEventDlg != null )
myEventDlg(this, myEventArgs);
Trace("finish try block");
}
catch(Exception ex)
{
Trace("caught exception: " + ex.ToString();
}
finally
{
Trace("in finally block");
}
．．．
public delegate void MyEventHandler( object sender, MyEventArgs e);
..
myObj.MyEventRaised += new MyEventHandler(this.MyEvent_Handler);
private void |
|
d**e
发帖数: 1124 | 46 【 以下文字转载自 EE 讨论区 】
【 原文由 dime 所发表 】
如何disable 那个恶心的 "trace-all", 问了个牛人, 他说
对wireless模拟没办法disable "trace-all"因为mobilenode.cc
里的implementation用到了trace.
可恶, 每次run的trace file都要900MB,不disable是没法用了.
谁有经验? 谢谢 |
|
s***n
发帖数: 373 | 47 程序结构大概是
读取trace，经过分析之后，存入postgresql 数据库。trace文件是2GB
现在的linux机器是8GB, 两个硬盘， trace 在一个硬盘上， db在另外一个。
程序运行起来分析了1GB之后就变的很慢，CPU占用率才不到3%, memeory也够用，还有4
个GB free呢。
这段程序以前在一个mac server上运行没有任何问题，分析2GB的trace也就1分钟而已。
可能的瓶颈会在哪里？ |
|
i**p
发帖数: 902 | 48 这是一个root了的Android手机.
3 parts of dmesg here, insmod, remove sd card, insert sd card:
--------------------------------------
insmod mysdio.ko (sd card is in, trace is from my printk. no probe trace
though I add prink to my_sdio_probe)
<7>[ 263.716249] (pid:728, cmd:insmod) my_sdio_driver.drv.name:CRYPTRmicro_
sdio
<7>[ 263.716316] (pid:728, cmd:insmod) my_sdio_driver.drv.bus:0x8049be80
<7>[ 263.716373] (pid:728, cmd:insmod) my_sdio_driver.drv.bus->name:sdio
<7>[ 263.716429] (pid:728, cmd:insm... 阅读全帖 |
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k**e
发帖数: 86 | 49 The BootVis utility traces boot time metrics and then displays the results in
a variety of graphs showing total boot time, CPU usage, disk I/O, driver
delays, and disk utilization. Download it from http://www.microsoft.com/hwdev/platform/performance/fastboot/BootVis.asp and extract it into its own folder. Go to the folder and double-click on BootVis.exe. To analyze how your system boots, choose Trace Next Boot. (Choose Trace Next Boot + Driver Delays if you want to trace delays caused by drive |
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