jdhao
/ gcc-5.4.0-install.sh
Last active
February 20, 2024 08:46
The script will install GCC 5.4.0 on your CentOS 7 system, make sure you have root right. See https://jdhao.github.io/2017/09/04/install-gcc-newer-version-on-centos/ for more details.
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| echo "Downloading gcc source files..." | |
| curl https://ftp.gnu.org/gnu/gcc/gcc-5.4.0/gcc-5.4.0.tar.bz2 -O | |
| echo "extracting files..." | |
| tar xvfj gcc-5.4.0.tar.bz2 | |
| echo "Installing dependencies..." | |
| yum -y install gmp-devel mpfr-devel libmpc-devel | |
| echo "Configure and install..." |
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| #! /bin/bash | |
| wget https://github.com/google/protobuf/releases/download/v2.6.1/protobuf-2.6.1.tar.gz | |
| tar xzf protobuf-2.6.1.tar.gz | |
| cd protobuf-2.6.1 | |
| sudo apt-get update | |
| sudo apt-get install build-essential | |
| sudo ./configure | |
| sudo make | |
| sudo make check | |
| sudo make install |
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| // Copyright (c) 2017 Ismael Celis | |
| // Permission is hereby granted, free of charge, to any person obtaining a copy | |
| // of this software and associated documentation files (the "Software"), to deal | |
| // in the Software without restriction, including without limitation the rights | |
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| // copies of the Software, and to permit persons to whom the Software is | |
| // furnished to do so, subject to the following conditions: | |
| // The above copyright notice and this permission notice shall be included in all |
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| Latency Comparison Numbers (~2012) | |
| ---------------------------------- | |
| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns 14x L1 cache | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
| Compress 1K bytes with Zippy 3,000 ns 3 us | |
| Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
| Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |