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Formula to determine brightness of RGB color
...as: Y = (R<<1+R+G<<2+B)>>3 (thats only 3-4 CPU cycles on ARM) but I guess a good compiler will do that optimisation for you.
– rjmunro
Mar 11 '15 at 11:16
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What is the difference between PS1 and PROMPT_COMMAND
...e to get fancy with something waiting on a FIFO prior to calling $PS1 (and armed again at the end of $PS1); the \u \h might cause some trouble, particularly if you're using some fancy regex; but otherwise: one can accomplish anything PROMPT_COMMAND can by using command substitution within $PS1 (and,...
Limitations of Intel Assembly Syntax Compared to AT&T [closed]
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How about Intel syntax for ARM?
– ceving
May 11 '17 at 8:35
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show 1 more comment
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错误解决:Xcode not set up properly. You may need to confirm the licens...
... Xcode -> Preferences -> Locations - > Command Line Tools
#设置好xcode的安装位置
或
1
sudo -i xcode-select -switch /Applications/Xcode6-Beta6.app/Contents/Developer
根据具体路径：
（sudo xcode-select -switch...
Xenocode Postbuild 2010 for .NET程序混淆器(含序列号) - 软件下载 - 清泛...
...不支持64位OS）
《Xenocode Postbuild 2010 for .NET 混淆工具的详细使用步骤》
8.0.1112.2WinXP,Win7,Win8,Win109.74M
Linux bcc tools使用总结（持续更新） - 操作系统(内核) - 清泛网 - 专注IT技能提升
...后，手动Ctrl + C 结束统计，输出此段时间内各自耗时区间的IO事件个数。
默认微秒区间，-m 参数则是毫秒区间。
# /usr/share/bcc/tools/biolatency
Tracing block device I/O... Hit Ctrl-C to end.
^C
usecs : count distribution
...
Linux bcc tools使用总结（持续更新） - 操作系统(内核) - 清泛网 - 专注IT技能提升
...后，手动Ctrl + C 结束统计，输出此段时间内各自耗时区间的IO事件个数。
默认微秒区间，-m 参数则是毫秒区间。
# /usr/share/bcc/tools/biolatency
Tracing block device I/O... Hit Ctrl-C to end.
^C
usecs : count distribution
...
libunwind：记录程序崩溃堆栈 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...ed #编译成.so，否则默认静态.la
make
make install
记录堆栈的代码如下：
static void log_backtrace(void) {
char name[256];
unw_cursor_t cursor;
unw_context_t uc;
unw_word_t ip, sp, offp;
unw_getcontext(&uc);
unw_init_local(&cursor, &uc);
syslog(LOG_ERR, "--i...
Linux bcc tools使用总结（持续更新） - 操作系统(内核) - 清泛网移动版 - ...
...后，手动Ctrl + C 结束统计，输出此段时间内各自耗时区间的IO事件个数。
默认微秒区间，-m 参数则是毫秒区间。
# /usr/share/bcc/tools/biolatency
Tracing block device I/O... Hit Ctrl-C to end.
^C
usecs : count distribution
...
Linux bcc tools使用总结（持续更新） - 操作系统(内核) - 清泛网 - 专注IT技能提升
...后，手动Ctrl + C 结束统计，输出此段时间内各自耗时区间的IO事件个数。
默认微秒区间，-m 参数则是毫秒区间。
# /usr/share/bcc/tools/biolatency
Tracing block device I/O... Hit Ctrl-C to end.
^C
usecs : count distribution
...