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OpenSuSE 安装bpftrace - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...o_nanosleep { printf("PID %d sleeping...\n", pid); }'
trace processes calling sleep
bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @[comm] = count(); }'
count syscalls by process name
--End--bpftrace bpf
【iOS】有关苹果iOS App的一些进展、BluetoothLE蓝牙拓展等 - App Inventor...
...hallenge here is that Apple has restricted access somewhat to what I would call "classic" Bluetooth due to energy consumption concerns. They do allow use of Bluetooth low energy without issue, which we do plan to implement full support for. Knowing what kind of Arduino you use and which Bl...
Specifying Maven's local repository location as a CLI parameter
... The local repository must be an absolute path, maven.apache.org/guides/mini/guide-configuring-maven.html.
– luka5z
Dec 28 '16 at 16:21
3
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What is meant by Ems? (Android TextView)
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android:ems or setEms(n) sets the width of a TextView to fit a text of n 'M' letters regardless of the actual text extension and text size. See wikipedia Em unit
but only when the layout_width is set to "wrap_content". Other layo...
How to escape a pipe char in a code statement in a markdown table?
... As of March 2019, in Gitlab Wikis, you still need to use "|" inside the markup code.
– knb
Mar 22 '19 at 13:52
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Get Unix Epoch Time in Swift
...you have to account for networking delays and check for connectivity. I decided to just use Foundation...
– Chase Roberts
Dec 9 '16 at 20:23
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Python way of printing: with 'format' or percent form? [duplicate]
...atting expression is deprecated.However,as stated before the format method call is a tad more powerful.
Also note that the % expressions are bit more concise and easier to code.Try them and see what suits you best
share
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git: difference between “branchname” and “refs/heads/branchname”
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See, branchName needs to be fully resolved before GIT can actually identify it. The fully resolved name will be refs/heads/branchName.
One of the famous commandsgit checkout branchName actually automatically resolves it fully to identify where you want to checkout. Note that it does it aut...
MySQL CONCAT returns NULL if any field contain NULL
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For those wonder, as I did, what the COALESCE function does: it returns the first non-NULL value parameter passed to it (or NULL if all parameters are NULL). By passing an empty string as the second parameter, you are guaranteeing it will not return...
How do you use window.postMessage across domains?
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
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