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Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网移动版 - ...
...D COMM FD ERR PATH
4235 head -1 2 tls/x86_64/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/libc.so.6
4235 head -1 2 x86_64/x86...
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网 - 专注C++内核技术
...D COMM FD ERR PATH
4235 head -1 2 tls/x86_64/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/libc.so.6
4235 head -1 2 x86_64/x86...
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网移动版 - ...
...D COMM FD ERR PATH
4235 head -1 2 tls/x86_64/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/libc.so.6
4235 head -1 2 x86_64/x86...
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网 - 专注C++内核技术
...D COMM FD ERR PATH
4235 head -1 2 tls/x86_64/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/libc.so.6
4235 head -1 2 x86_64/x86...
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网移动版 - ...
...D COMM FD ERR PATH
4235 head -1 2 tls/x86_64/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/libc.so.6
4235 head -1 2 x86_64/x86...
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...D COMM FD ERR PATH
4235 head -1 2 tls/x86_64/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/libc.so.6
4235 head -1 2 x86_64/x86...
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...D COMM FD ERR PATH
4235 head -1 2 tls/x86_64/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/libc.so.6
4235 head -1 2 x86_64/x86...
Linux bpftrace学习笔记（持续更新） - 操作系统(内核) - 清泛网移动版 - ...
...D COMM FD ERR PATH
4235 head -1 2 tls/x86_64/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/x86_64/libc.so.6
4235 head -1 2 tls/libc.so.6
4235 head -1 2 x86_64/x86...
Ternary operator is twice as slow as an if-else block?
...
To answer this question, we'll examine the assembly code produced by the X86 and X64 JITs for each of these cases.
X86, if/then
32: foreach (int i in array)
0000007c 33 D2 xor edx,edx
0000007e 83 7E 04 00 cmp dword ptr [esi+4],0
000000...
rgdal package installation
...a Fedora 21 system using R-3.2.0, the following worked:
yum install gdal.x86_64 gdal-devel.x86_64 gdal-libs.x86_64
yum install proj.x86_64 proj-devel.x86_64
yum install proj-epsg.x86_64 proj-nad.x86_64
Obviously this was the result of repeated tries to get:
install.packages("rgdal")
to work. Y...