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bpftrace教程【官方】 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...过滤条件，则只能探测每次read()调用的结束时间，而不是now-start。
delete(@start[tid]): 释放变量。.
8. 统计进程级别的事件
# bpftrace -e 'tracepoint:sched:sched* { @[probe] = count(); } interval:s:5 { exit(); }'
Attaching 25 probes...
@[tracepoint:sched:s...
LoaderManager with multiple loaders: how to get the right cursorloader
... It works with Loader.getID()! I've doublechecked this right now. Great!
– Kay Gladen
Oct 31 '11 at 20:20
2
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Python Requests and persistent sessions
...less than 30 minutes old
lastModification = (datetime.datetime.now() - time).seconds
if lastModification < self.maxSessionTime:
with open(self.sessionFile, "rb") as f:
self.session = pickle.load(f)
wasReadFromCache = ...
How can you iterate over the elements of an std::tuple?
... overloads for every type the tuple might contain. This works best if you know all the tuple elements will share a common base class or something similar.
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Adding git branch on the Bash command prompt
...'
}
export PS1="\u@\h \W\[\033[32m\]\$(parse_git_branch)\[\033[00m\] $ "
Now, start the new terminal window, and try entering to any git-repo. The current branch would be shown, with the prompt.
4 More Info - MAC/Linux
sh...
What are '$$' used for in PL/pgSQL
...ACE FUNCTION update_ts() RETURNS TRIGGER AS $BODY$ BEGIN NEW.updated_at = NOW(); RETURN NEW; END; $BODY$ LANGUAGE plpgsql - I don't see body defined anywhere. I really have no idea what is going on here
– Growler
Feb 2 '17 at 3:55
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drag drop files into standard html file input
...
D'oh, a bit late then :) Right now im just using simple user agent checks in JS. Of course you have to test for MSIE , Trident/ (IE11) and Edge/ (IE12)...
– jlb
Aug 17 '16 at 12:56
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How to override Backbone.sync?
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I know this answer is a bit too late, and the answer from @Raynos is great, but I did it a bit differently, and maybe it would be useful for you or for any other person trying to use an API with Backbone.
Instead of overriding ...
How to get git diff with full context?
...
I know this is old, but I also dislike hard-coded solutions, so I tested this:
git diff -U$(wc -l MYFILE)
Using -U seems to be the only way to approach the issue, but using a line count promises that it will work for even a s...
How to clear the interpreter console?
...mport os
def cls():
os.system('cls' if os.name=='nt' else 'clear')
# now, to clear the screen
cls()
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