| tobert@spaceghost /sys/devices/system/clocksource/clocksource0 $ cat /proc/cpuinfo |grep 'model name' |head -n 1 | |
| model name : Intel(R) Xeon(R) CPU E31270 @ 3.40GHz | |
| tobert@spaceghost /sys/devices/system/clocksource/clocksource0 $ cat /proc/version | |
| Linux version 3.11.4-gentoo (root@sysresccd) (gcc version 4.6.4 (Funtoo 4.6.4) ) #1 SMP Mon Oct 7 05:33:55 | |
| tobert@spaceghost /sys/devices/system/clocksource/clocksource0 $ cat available_clocksource | |
| tsc hpet acpi_pm | |
| tobert@spaceghost /sys/devices/system/clocksource/clocksource0 $ cat current_clocksource | |
| tsc | |
| tobert@spaceghost /sys/devices/system/clocksource/clocksource0 $ echo hpet |sudo tee current_clocksource | |
| hpet |
| url = 'https://www.zhihu.com/people/fan-hai-wai-yao-yan/pins/posts' | |
| headers = {'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.90 Safari/537.36'} | |
| r = requests.get(url, headers=headers) | |
| document = lxml.html.fromstring(r.text) | |
| data = document.get_element_by_id('data') | |
| content = json.loads(html.unescape(data.get('data-state'))) | |
| pattern = '<html lang="zh"><head data-reactid="2"><meta charset="utf-8" data-reactid="3"/><body>%s</body></html>' |
To limit a CPU to a certain C-state, you can pass the processor.max_cstate=X option in the kernel line of /boot/grub/grub.conf.
Here we limit the system to only C-State 1:
kernel /vmlinuz-2.6.18-371.1.2.el5 ... processor.max_cstate=1
On some systems, the kernel can override the BIOS setting, and the parameter intel_idle.max_cstate=0 may be required to ensure sleep states are not entered:
The GCC distributed with CentOS 6 is 4.4.7, which is pretty outdated. I'd like to use gcc 4.8+. Also, when trying to install Linuxbrew you run into a dependency loop where Homebrew's gcc depends on zlib, which depends on gcc. Here's how I solved the problem.
Note: Requires sudo privileges.
| //ignore being compatible with C++99 and other warnings | |
| { | |
| "cmd": ["clang++","-std=c++11", "-w", "-stdlib=libc++", "-Weverything", "${file}", "-o", "${file_path}/${file_base_name}"], | |
| "file_regex": "^(..[^:]*):([0-9]+):?([0-9]+)?:? (.*)$", | |
| "working_dir": "${file_path}", | |
| "selector": "source.c, source.c++", | |
| "variants": | |
| [ | |
| { |
| [HTTP server by using Python only](http://coolshell.cn/articles/1480.html) | |
| 如果你急需一个简单的Web Server，但你又不想去下载并安装那些复杂的HTTP服务程序，比如：Apache，ISS等。那么， Python 可能帮助你。使用Python可以完成一个简单的内建 HTTP 服务器。于是，你可以把你的目录和文件都以HTTP的方式展示出来。佻只需要干一件事情，那就是安装一个Python。 | |
| 实际上来说，这是一个可以用来共享文件的非常有用的方式。实现一个微型的HTTP服务程序来说是很简单的事情，在Python下，只需要一个命令行。下面是这个命令行：（假设我们需要共享我们的目录 /home/haoel 而IP地址是192.168.1.1） | |
| 1 | |
| 2 | |
| $ cd /home/haoel | |
| $ python -m SimpleHTTPServer |
| /* | |
| * Copyright 2014 Google Inc. | |
| * Author: willemb@google.com (Willem de Bruijn) | |
| * | |
| * Test software tx timestamping, including | |
| * | |
| * - SCHED, SND and ACK timestamps | |
| * - RAW, UDP and TCP | |
| * - IPv4 and IPv6 | |
| * - various packet sizes (to test GSO and TSO) |
| // avoid error::bind address already in use | |
| // set socket can be reuse | |
| int on = 1; | |
| setsockopt( sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on) ); |
| /* | |
| * This program demonstrates how the various time stamping features in | |
| * the Linux kernel work. It emulates the behavior of a PTP | |
| * implementation in stand-alone master mode by sending PTPv1 Sync | |
| * multicasts once every second. It looks for similar packets, but | |
| * beyond that doesn't actually implement PTP. | |
| * | |
| * Outgoing packets are time stamped with SO_TIMESTAMPING with or | |
| * without hardware support. | |
| * |
| import xlrd | |
| def main(): | |
| datafile = xlrd.open_workbook('datafile.xls') | |
| sheet_names = datafile.sheet_names() | |
| for sheet_name in sheet_names: | |
| sheet = datafile.sheet_by_name(sheet_name) | |
| sheet.col_values(col_index, row_index_begin, row_index_end) | |
| if __name__ == '__main__': |