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Linux bcc tools使用总结（持续更新） - 操作系统(内核) - 清泛网 - 专注C++内核技术
...e/bcc/tools/execsnoop -t
TIME(s) PCOMM PID PPID RET ARGS
0.996 head 12101 6578 0 /usr/bin/head -v -n 8 /proc/meminfo
0.996 head 12102 6578 0 /usr/bin/head -v -n 2 /proc/stat /proc/version /proc/uptime /proc/loadavg /proc/sys/fs/file-nr /proc/s...
Linux bcc tools使用总结（持续更新） - 操作系统(内核) - 清泛网移动版 - ...
...e/bcc/tools/execsnoop -t
TIME(s) PCOMM PID PPID RET ARGS
0.996 head 12101 6578 0 /usr/bin/head -v -n 8 /proc/meminfo
0.996 head 12102 6578 0 /usr/bin/head -v -n 2 /proc/stat /proc/version /proc/uptime /proc/loadavg /proc/sys/fs/file-nr /proc/s...
Linux bcc tools使用总结（持续更新） - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...e/bcc/tools/execsnoop -t
TIME(s) PCOMM PID PPID RET ARGS
0.996 head 12101 6578 0 /usr/bin/head -v -n 8 /proc/meminfo
0.996 head 12102 6578 0 /usr/bin/head -v -n 2 /proc/stat /proc/version /proc/uptime /proc/loadavg /proc/sys/fs/file-nr /proc/s...
Linux bcc tools使用总结（持续更新） - 操作系统(内核) - 清泛网移动版 - ...
...e/bcc/tools/execsnoop -t
TIME(s) PCOMM PID PPID RET ARGS
0.996 head 12101 6578 0 /usr/bin/head -v -n 8 /proc/meminfo
0.996 head 12102 6578 0 /usr/bin/head -v -n 2 /proc/stat /proc/version /proc/uptime /proc/loadavg /proc/sys/fs/file-nr /proc/s...
Linux bcc tools使用总结（持续更新） - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...e/bcc/tools/execsnoop -t
TIME(s) PCOMM PID PPID RET ARGS
0.996 head 12101 6578 0 /usr/bin/head -v -n 8 /proc/meminfo
0.996 head 12102 6578 0 /usr/bin/head -v -n 2 /proc/stat /proc/version /proc/uptime /proc/loadavg /proc/sys/fs/file-nr /proc/s...
pandas dataframe columns scaling with sklearn
...;> scaler = MinMaxScaler()
>>> dfTest = pd.DataFrame({'A':[14.00,90.20,90.95,96.27,91.21],
'B':[103.02,107.26,110.35,114.23,114.68],
'C':['big','small','big','small','small']})
>>> dfTest[['A', 'B']] = scaler.fit_transform(...
How to assign string to bytes array
...ices in Go is using a slice of bytes []byte and not a set array of bytes [20]byte when converting a string to bytes... Don't believe me? Check out Rob Pike's answer on this thread
– openwonk
Feb 14 '16 at 0:44
...
Is object empty? [duplicate]
...n-zero value
// that that property is correct.
if (obj.length > 0) return false;
if (obj.length === 0) return true;
// If it isn't an object at this point
// it is empty, but it can't be anything *but* empty
// Is it empty? Depends on your application.
if (typeof...
How to add an extra column to a NumPy array
...lution and faster to boot is to do the following:
import numpy as np
N = 10
a = np.random.rand(N,N)
b = np.zeros((N,N+1))
b[:,:-1] = a
And timings:
In [23]: N = 10
In [24]: a = np.random.rand(N,N)
In [25]: %timeit b = np.hstack((a,np.zeros((a.shape[0],1))))
10000 loops, best of 3: 19.6 us per ...
How do you round a floating point number in Perl?
... and floor()?
Trig functions?
Remember that int() merely truncates toward 0. For rounding to a certain number of digits, sprintf() or printf() is usually the easiest
route.
printf("%.3f", 3.1415926535); # prints 3.142
The POSIX module (part of the standard Perl distribution) implement...