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tcp加速技术解决方案 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...的性能提升。
1
getsockopt(fd, SOL_SOCKET, SO_INCOMING_CPU, &cpu, &len);
SO_ATTACH_REUSEPORT_EBPF和SO_ATTACH_REUSEPORT_CBPF
如上述SO_INCOMING_CPU需要应用程序调正处理逻辑， 那有没办法直接在reuseport选择lis...
What is the rationale for fread/fwrite taking size and count as arguments?
... one.
Consider this:
int intArray[10];
fwrite(intArray, sizeof(int), 10, fd);
If fwrite accepted number of bytes, you could write the following:
int intArray[10];
fwrite(intArray, sizeof(int)*10, fd);
But it is just inefficient. You will have sizeof(int) times more system calls.
Another poin...
How do I create a message box with “Yes”, “No” choices and a DialogResult?
...re documentation can be found at http://msdn.microsoft.com/en-us/library/ba2a6d06.aspx
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How do I write stderr to a file while using “tee” with a pipe?
...our log file very hackish and cludgy. Notice how you need to keep an exra FD and do cleanup afterward by killing it and technically should be doing that in a trap '...' EXIT.
There is a better way to do this, and you've already discovered it: tee.
Only, instead of just using it for your stdout, h...
Is there any way to close a StreamWriter without closing its BaseStream?
...en parameter after StreamWriter was created?
– c00000fd
Oct 19 '18 at 5:16
@c00000fd: Not that I'm aware of.
...
How to redirect output of an entire shell script within the script itself?
...
For saving the original stdout and stderr you can use:
exec [fd number]<&1
exec [fd number]<&2
For example, the following code will print "walla1" and "walla2" to the log file (a.txt), "walla3" to stdout, "walla4" to stderr.
#!/bin/bash
exec 5<&1
exec 6<&am...
Looping through the content of a file in Bash
...ned up with the process exits. An explicit close can be done to reuse the fd number. To close a fd, use another exec with the &- syntax, like this: exec 4<&-
– Stan Graves
Oct 5 '09 at 21:09
...
Is there a way for multiple processes to share a listening socket?
...ndeed two process id's listening:
$ lsof -i :8888
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
Python 26972 avaitla 3u IPv4 0xc26aa26de5a8fc6f 0t0 TCP localhost:ddi-tcp-1 (LISTEN)
Python 26973 avaitla 3u IPv4 0xc26aa26de5a8fc6f 0t0 TCP localhost:ddi-...
C# listView, how do I add items to columns 2, 3 and 4 etc?
...iewItem item2 = new ListViewItem("Something2");
item2.SubItems.Add("SubItem2a");
item2.SubItems.Add("SubItem2b");
item2.SubItems.Add("SubItem2c");
ListViewItem item3 = new ListViewItem("Something3");
item3.SubItems.Add("SubItem3a");
item3.SubItems.Add("SubItem3b");
item3.SubItems.Add("SubItem3c");
...
Python subprocess.Popen “OSError: [Errno 12] Cannot allocate memory”
...
I'd appreciate a simple diagnostic, e.g. following /proc/fd/maps to determine if overcommitted memory is in fact the issue
– Dima Tisnek
May 14 '15 at 7:01
a...