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What is thread contention?
... or more threads over a shared resource. Resource can be a lock, a counter etc. Competition means "who gets it first". The more threads the more contention. The more frequent access to a resource the more contention.
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Groovy executing shell commands
...ommand with env vars: envVars = ["P4PORT=p4server:2222", "P4USER=user", "P4PASSWD=pass", "P4CLIENT=p4workspace"]; workDir = new File("path"); cmd = "bash -c \"p4 change -o 1234\""; proc = cmd.execute(envVars, workDir);
– Noam Manos
Nov 5 '13 at 9:39
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Multithreading: What is the point of more threads than cores?
...ore than 4 threads running at a time? Wouldn't they just be stealing time (CPU Resources) from each other?
17 Answers
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Node.js on multi-core machines
...pling between processes, have more sophisticated load-balancing decisions, etc.), but it is definitely more work to set up and the built-in cluster module is a low-complexity alternative that works for most people.
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Why does Android use Java? [closed]
...ill be exploitable themselves. No buffer-overruns, mistakes with pointers, etc...
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淘宝大秒系统设计详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...系统，文章主要介绍大秒系统以及这种典型读数据的热点问题的解决思路和实践经验。一些数据
大家还记得2013年的小米秒杀吗？三款小米手机各11万台开卖，走的都是大秒系统，3分钟后成为双十一第一家也是最快破亿的旗舰店...
linux下iptables配置详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...成DROP的话)
允许loopback!(不然会导致DNS无法正常关闭等问题)
IPTABLES -A INPUT -i lo -p all -j ACCEPT (如果是INPUT DROP)
IPTABLES -A OUTPUT -o lo -p all -j ACCEPT(如果是OUTPUT DROP)
下面写OUTPUT链,OUTPUT链默认规则是ACCEPT,所以我们就写需要DROP(放弃)...
Static linking vs dynamic linking
...g it all before it can be used (emptying most of the caches, hitting TLBs) etc. There was a time when this was considered slow.
So you would not have any benefit anymore.
I do not recall what OS (Solaris or FreeBSD) gave me problems with my Unix build system because I just wasn't doing this and w...
Linux反编译全攻略 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...48000=0x988，我们按 return 键，打开 go to 窗口，输入 0x988 ，定位到08048988处，改代码为e830000000。改完后，“ ./cm2 ”运行程序，OK。出现 crackme 窗口了。
第二个任务，找出正确的注册码。
为保持本文一个苗条的身材及加大本文所...
Best approach to remove time part of datetime in SQL Server
...es on internal storage
it extends to work out first day of month, tomorrow etc by changing "0" base
Edit, Oct 2011
For SQL Server 2008+, you can CAST to date i.e. CAST(getdate() AS date). Or just use date datatype so no time to remove.
Edit, Jan 2012
A worked example of how flexible this is: Ne...