一个小玩意PHP-Valgrind的介绍

作者: Laruence( ) 本文地址: http://www.laruence.com/2013/08/14/2899.html 转载请注明出处

首先, 太久不更新博客了, 容我先啰嗦几句.

我一直以为人总是会挤出时间写博客的, 但现在看来我错了. 博客很久不更新, 倒不是说没有内容可以分享. 而是这一年来确实忙了很多, 本身工作上的事情就很多, 业余时间也被PHP项目上的事情, Zend的事情填满. 再加上一些小感悟也都在微博上牢骚了… 所以….

Anyway, 很感谢各位经常来我博客的朋友, 不过我建议大家如果是提问的话, 不要在留言里, 有的时候会被博客当做SPAM, 有一些小问题, 可以来微博At我 @laruence

言归正传, 今天分享个前天刚刚做的小工具, 代码可以在我的github上找到: php-valgrind. 这个工具主要是为PHP脚本提供了可以在脚本中开启Valgrind(严格说是Callgrind)的Profile能力.

一般来说, 我们用Callgrind的时候, 如果要分析某一个函数, 可以通过toggle-collect=”函数名”, 来告诉Callgrind在进入这个函数的时候开始Profile. 但是这样没有办法分析具体某一段代码..

其实Callgrind提供了一个机制, 可以让我们在代码中控制何时开启: CALLGRIND_TOGGLE_COLLECT

比如:

#include <stdio.h>
#include <valgrind/callgrind.h>

void foo(int a[100]) {
    int i = 0;
}

int main (int argc, char **argv) {
    int i, a[100];

    CALLGRIND_START_INSTRUMENTATION;
    CALLGRIND_TOGGLE_COLLECT;
    for (i=0; i<100; i++) {
        a[i] = 2;
    }
    CALLGRIND_TOGGLE_COLLECT;
    CALLGRIND_STOP_INSTRUMENTATION;
    return;
}

然后, 编译成a.out以后, 我们就可以分析具体的这个循环代码断的相关Profile信息:

$ valgrind --tool=callgrind --collect-atstart=no --instr-atstart=no ./a.out

之后生成的callgrind.out就可以被callgrind_annotate, kcachegrind等工具来分析了

$callgrind_annotate callgrind.out.27538
//OUTPUT:
--------------------------------------------------------------------------------
 Ir
---------------------------------------
617  PROGRAM TOTALS

---------------------------------------
 Ir  file:function
---------------------------------------
617  test.c:main [***dev/a.out]

是不是很方便呢?

但是呢, 有的时候, 比如我们做扩展, 或者其他的一类内部的性能分析的时候. 需要在PHP脚本也能做这样的触发. 就没有办法了. 于是我就写了这个小工具php-valgrind, 装好这个扩展以后, 来看个例子:

<?php
$a = array();
callgrind_toggle();
for ($i=0;$i<1000;$i++) {
    $a[$i] = 2;
}
callgrind_toggle();

然后我们开始分析:

$valgrind --tool=callgrind --collect-atstart=no --instr-atstart=no php /tmp/1.php

然后我们分析下输出:

-------------------------
       Ir
--------------------------
2,361,260  PROGRAM TOTALS

//以下省略

然后让我们用qcachegrind(带gui的callgrind分析工具), 来看看:

可见, PHP要实现同样的功能需要的各种代码数相比C语言来说, 那可是多了N倍的(所以当然要比C慢了.. 嘿嘿, 再次申明: “C语言是最好的语言, 没有之一!”)

好了工具介绍完毕, 大家有兴趣的可以去玩玩, 这个工具还可以用来让我们了解, 我们的一个PHP代码, 会触发调用那些底层的函数, 或者系统调用等等, Enjoy~

Comments

2013/08/14, 秋风 writes: 终于更新了，试试！2013/08/14, 夜丶有雪 writes: 前排留名、广告位招租 C语言是最好的语言, 没有之一!2013/08/14, pakey writes: 没有抢到沙发2013/08/14, 微历史 writes: 保持更新很重要2013/08/14, 风逐蓝天 writes: PHP 是最好的语言~~~2013/08/14, php230 writes: V52013/08/14, 我叫张大熊 writes: 微博私信问了你一个问题 可是还没有得到回答 求回答啊2013/08/14, 我叫张大熊 writes: 微博私信问了你一个问题 可是还没有得到回答 求回答啊2013/08/15, eagle writes: 需要另行安装Callgrind吗？2013/08/15, eagle writes: 需要另行安装Callgrind吗？2013/10/14, wclssdn writes: 我也在微博问过大牛好几个问题.. 就是不理我... 汗... 还有. 类似大牛的这个工具可以用xhprof.. 有图片展示方式... 太直观了... 数据表格也更丰富...2013/12/18, goodboy writes: “C语言是最好的语言” ......2014/02/19, Winona writes: I was curious if you ever thought of changing the page layout of your website? Its very well written; I love what youve got to say. But maybe you could a little more in the way of content so people could connect with it better. Youve got an awful lot of text for only having one or two pictures. Maybe you could space it out better?2014/02/27, real estate preview writes: Ԝe're a ցroup օf volunteers and starting a brand new scheme in ߋur community. Your web site provided us with uѕеful information to work on. You have done a formidable job and ouг whole groսp can be thankful to you. Ңere iѕ my blog: real estate preview2014/09/10, computer repairs, apple mac pro reviews, cell phone repair, computer support,mercadolibre writes: Its 23-inch screen is already written on Apple's website because "Discontinued. As a result, the smaller sized or thinner the notebook, the lesser the capabilities in view that they are pressured to go out some ports. Feel free to visit my web blog: computer repairs, apple mac pro reviews, cell phone repair, computer support,mercadolibre2014/10/17, Nigel writes: 模板大神而来~~~~~2016/01/14, security cameras mod 1.7.10 writes: These activities while using people is frequently followed and also non-compliant recreation can readily be monitored. Like other kinds of cameras, IP cameras could be configured based on the protection demands of any business. security cameras mod 1.7.10 camera zoom night vision Kathryn Dawson writes articles for Traders Warehouse, a store from the UK selling a wide range of surveillance camera and equipment systems. Article Source: Brook can be a pro in reviewing the technical gadgets, specifically in Security Camera Systems of latest trends. The device has features an increased-quality camera allowing the users to capture precious moments of the lives inside a different way.2016/01/16, weed writes: Wine needs being stored with a temperature around 58 degrees Fahrenheit correctly to keep properly. The recommended vitamin to utilize would offer the ingredient inside the B-12 vitamin, called methylcobalamin. Eggs In many cases, the company could be restricted to borrowing a compact sum they had intended. Keeping the bananas faraway from the heat or sunlight will extend their lifespan. Easter eggs usually stay outside in the refrigerator for under 2 hours, therefore your Easter egg hunt lasted all afternoon, your eggs won't be safe to nibble on. Therefore what people could possibly be reading might stop fresh news. Weed weed Various forms of newspapers exist for conveying this news of each activity.2016/01/16, underwater camera comparison writes: For instance, you can find extremely small surveillance cameras that are used for spying, night viewing, are vandal resistant and that are specifically generated for indoor or outdoor uses. The Diana can be a prized camera which includes the power to tell any narrative. Latest underwater camera comparison camera Always keep memory card inside protective case it came in, never allow it to go lie loose inside your drawer or camera case. Now the professional digital camera has just about caught up with the film camera. Installation of a wireless home security system requires someone that's trained inside the cameras and receivers, and knows the newest tips and tricks on you get one to work properly too.2016/01/17, plug in dildo me writes: Another concern is most men finish earlier, don't control their erection to get a longer period and for that reason on. This is definitely an advanced move that requires someone to flex your PM about 3-5 seconds before orgasm. Best pocket pussy 2015 This toys males have turn out to get the new must have males whether or otherwise they have partners. Photography is often a great way for just a child to unleash their creativity and prepare them for that future. The wholesaler gains advantage from added contact with their products plus a greater retail base marketing their items which produces a mutually beneficial arrangement. A neutral viewpoint with this stage can help gather information. Making flesh light plug in dildo me Terrorism removed from Latest World news is but one face of their violence.2016/01/17, Security First writes: Most importantly, these cameras need for being moisture, dust and smoke proof to work with an efficient manner. No wonder, wireless home security camera systems have gained huge popularity in this particular arena, because of these varied qualities and hassle-free setting. Security First cameras training Never hightail it with a concept that because your home security camera system worked once, it'll forever are very effective in future. Although these cameras use radio signals to send out their video data into a receiver of DVR, they still need to be supplied with lv Direct Current (DC) power. The images become muddled if whatsoever apparent inside the lowered light.2016/01/17, garmin golf gps maps writes: You need the very best motorcycle GPS (global positioning system) you are able to afford. When you acquire a Garmin GPS device, you simply need to pay the purchase price so you would no longer must shoulder any setup charges as well as subscription fees. He said, overall, the Garmin Montana 650t handheld GPS was a superlative product. Four: Gather information - You want to gather all the information since you can about the forms of GPS units that you are interested in. Best deals on garmin golf gps maps gps systems Specific Garmin 1350LMT is essentially an upgrade to the excellent Device 1350T.2016/01/17, What does lawl mean writes: Rather than carrying around a wad of papers, you could use the PC to keep up with inventory and manage everything on screen. Fortune 500 companies as well as other SME's still practice SWOT analysis for crafting strategies which assist them in grabbing a competitive position locally as well as globally. Quotes about how much someone means to you The standard deviation is the spread of how far they deviate from the average of 43. After drinking more, you'll feel a tasteful sweetness that reminds you of succulent fruits like peach and mango. You can continue to keep a record from the conversation by sending the playback quality directly for your email. What does swag mean What does lawl mean You could have a few different alternatives for scrolling via your i - Phone's contact checklist.2016/01/17, things writes: Don't allow the name fool you: home security systems aren't just for the property. If you are within the market for a security systems system you should go online and visit The Home Security Store. Home security hardware products There are many ways to shield your home but the top way to protect it's with a security camera surveillance system. Article Source: Reiner is really a business owner and professional blogger that enjoys writing on subject matter in connection with lifestyle, do-it-yourself, security etc. You should ask any and questions you've got to make sure you are able to make the best decision as which security monitoring company is right for you personally. The press is socially obliged to protect yourself from spreading material depicting gratuitous violence, and inciting religious, racial, or ethnic hatred. Home security benefits things Carlson then noted that lots of African American Democrats often observe the Republican party as "racist," that Jackson agreed.2016/01/17, cost home alarm system writes: Although, regular alarms sometiems takes the perfect time to install and price hours and cash, making it more recommend to utilize this wireless cost home alarm system security system to protect your house and your familly. When you work with a gas alarm as part of your boat, it can alert you in the earliest about any LPG and deadly carbon monoxide leakage from the environment. Cheap alarm system for home The continuity produced because of the reed switch keeps the transistor BC547 switched OFF and hence the full system remains silent. As a runner you must pay special attention to your kind of personal protection alarm you buy. There certainly are a couple of circumstances to remember when choosing an invisible security system.2016/01/18, Hublot watches Big Bang he writes: Creation watches portfolio caters into a wide selection of audience and dominates the online watch market. At now, with costs for production being strategy to high, Wilsdorf obtained and gone after Geneva fulltime, where it absolutely was established since the Rolex Watch Company. Brand Hublot watches Big Bang he copy The reviews tell of your impressive watch, from Omega Seamaster enthusiasts. Whatever they purchase, it needs being the best possible, abdominal muscles finest, specimen of the company's kind. It may seem to me which the comedy magician have to do only two things.2016/01/20, usually writes: We wanted to ensure that an individual experience became functional and great launching initially on i - Phones i - Pads. Conveniently located on the list of lush greenery on Kaas plateau, Sahyadri mountain ranges, this health resort provides ample oxygen supply for better oxygenation. Beauty tips hindi mai She worked very difficult at combining her skill that has a technical idea that's earning a living for everyone ' using You - Tube. Both were blended together to 'make a soft mushroom matte smoky eye. Make some changes to your diet plan to increase your complexion as well as your figure. The very worthwhile thought process that comes from the mind may be the intelligence volume of our scientists that exceeds the expectations. usually beauty tips before bed While the trading community may prove to become profitable as it can be, you might also need to tap the entire world of creating foreign exchange exchange news.2016/01/20, netgear router extender writes: Failure to reset the wireless adapter might cause an IP conflict inside wireless netgear router extender regardless if it is really a Dynex you aren't. Each of such luxury hotels in Buenos Aires will place you inside downtown district, within just a short distance of countless famous attractions and sights. Fortunately there are good wireless options including 3G, 4G and satellite. Once you've done this all you've to do is place a new "extender" or "repeater" in the window that lets you get your Wi - Fi reception and presto. Hawking hw2r1 review In the initial block of options you are going to find Wi-Fi, which is right under Airplane Mode and right above Notifications.2016/01/20, 100 grams sugar to cups writes: After it has been dried, the plants are tied into four inch bundles. What it means is that parents need to be mindful of the sugars their families consume. Silver conversion 100 grams sugar to cups to ounces2016/01/21, led light bar off road again writes: You may also be treated to some incremental improvements in Friend - Stream, the contacts bar and dialer. It had lots of plant life, too a waterfall that led into a lagoon, where she loved to visit swimming. Xtreme led light bar off road again headlights Once the files are saved in the folder specified by you, it's possible to unzip them later after you've installed your app. But, in spite of their small size you'll find quite a number of features packed into advanced mini light bars, that is what means they are so reliable and useful. One other journey we wanted to make sure to ride early was called Stunt Fall, an exceptional reversing looper with two vertical towers nearby the front with the park.2016/01/21, cobra cxt 1035r we writes: Interesting facts to understand, isn't it Let me help you using this. You should use a nice reward as well as a bit of the reputation boost using the NCR. Uv-5r On the plus side, you are able to change out CB antennas and fix something much bigger. A powerful web presence has become one part from the vital ingredients of the branding strategy. Baofeng uv5ra vs uv5r When people sleep side-by-side, everyone is influenced by the other person's disruptive movements and sounds, including breathing and snoring. High quality handheld transceiver HAM radio set-ups might be bought for around $400. Even though subscribing to stock news in simple, it is going to greatly allow you to a lot to generate rightful changes according to your market. cobra cxt 1035r we baofeng promo code With language come various significant things like literature, history, culture, science and lifestyle.2016/01/21, http://brooklynatlantis.poly.Edu/View_profile.Php?userid=44471 writes: Though the latest celebrity gossip makes for an excellent entertainment package but these gossips have ruined the house of several stars. Generally speaking, local and international artists are pretty much aware that stepping in the celebrity industry means that media and press would enter their private lives and broadcast it to the public. Watch online episodes gossip girl However, with all the security features Lucky Nugget Casino has to offer, it is most certain that this casino is scam-free. the other day and it strongly resonated with this desire to pare back; to simplify; to become more real as a participant in this world and begin operating in a more authentic way. Xem online gossip girl season 1 vietsub To understand this a bit more we need to look at the "feel good factor". Viewed as one of the most famous video games for reducing weight, Zumba Fitness has managed to offer positive results for numerous women world-wide. Previous bans on short selling yielded a similar kind of effects on share prices, Mr. Watch online gossip girl the return of the ring Theyre (http://brooklynatlantis.poly.Edu/View_profile.Php?userid=44471) Amar Ujala is trusted for grounded news whilst still being known because of its Honesty and Authenticity.2016/01/26, Whirlpool cabrio Platinum Gas dryer writes: If you might be saving a lot of cash a year with this machine, can it balance out inside end. Whirlpool cabrio Platinum Gas dryer ld error Overall, this Whirlpool Cabrio WGD7600XW Gas Dryer is surely an excellent purchase. Get yours just a little greener with these tips from Anna Rosemann of Eco - Consulting LA. If you don't know what meaning, than ask a buddy, or perhaps your mother, and they will be more than thrilled to tell you.2017/04/27, example writes: This is really fascinating, You're an excessively skilled blogger. I've joined your rss feed and sit up for searching for extra of your fantastic post. Additionally, I have shared your web site in my social networks2017/04/28, example writes: I do not even know the way I stopped up right here, however I believed this post used to be great. I don't understand who you are but definitely you're going to a famous blogger in the event you aren't already. Cheers!2017/04/28, example writes: Thanks for sharing your thoughts on callgrind. Regards2017/10/01, seanrex writes: http://www.visionsoftomorrowcrm.org/2017/10/08, versage writes: http://www.xebeclounge.com/

Related posts:

注意PHP对字符串的递增运算GCC优化引起的一个”问题”记录一场没有胜利的局部战斗让你的PHP7更快之HugepageCopyright © 2010 风雪之隅 版权所有, 转载务必注明. 该Feed只供个人使用, 禁止未注明的转载或商业应用. 非法应用的, 一切法律后果自负. 如有问题, 可发E-mail至my at laruence.com.(Digital Fingerprint: 73540ba0a1738d7d07d4b6038d5615e2)

Related Posts:

GCC优化引起的一个”问题”HTTPOXY漏洞说明让你的PHP7更快(GCC PGO)在PHP中使用协程实现多任务调度记录一场没有胜利的局部战斗Curl的毫秒超时的一个”Bug”Weibo LAMP演变 – 6月在上海分享的PPTPHP浮点数的一个常见问题的解答Yaf and Phalcon, which is faster?Yar – 并行的RPC框架(Concurrent RPC framework)