软件背景
虽然很早就接触了HPC，也参与过一些项目，诸如电影动画渲染集群以及某博导老师的基因分析计算集群，但是对于跑超算的linpack，一直没时间上手玩。
Linpack是超算必测项目,也是考验优化能力的套件,很有意思，记录下安装过程。
要正常运行，主要需要安装3个部分组件：
- mpi ，这里使用MPICH2
- BLAS库，线性代数库 ，intel的还有自己的MKL库
- linpack程序本身
这三个组件，除了linpack本身是标准的外，MPI和BLAS都有多种版本不同的实现，各有千秋和应用场景或者优化的特点。当前主要为了跑通，所以mpi选用mipch2,BLAS选用openblas.
软件地址如下:
HPL - A Portable Implementation of the High-PerformanceLinpack Benchmark for Distributed-Memory Computers
https://netlib.org/benchmark/hpl/
xianyi (Zhang Xianyi) · GitHubxianyi has 36 repositories available. Follow their code on GitHub.
https://github.com/xianyi/openBLAS直接下release里面最新的版本就可以。
Downloads | MPICH
编译安装过程
mpich2
先安装配置mpi，mpich2安装配置和其他开源软件没啥不同就是解压，configure make make install 几步
tar zxf mpich-4.0.3.tar.gz
cd mpich-4.0.3
./configure --prefix=/usr/local/mpich2/
#需要提前安装好gfortran ,关于网上别的文章说的要添加--with-device=ch4:ofi 参数，我的configure的时候，是默认给我配置的这个，对于其他deivce类型，有需要优化的时候再慢慢看或者做测试吧。
make -j4
sudo make install 安装完成后需要配置环境变量,添加以下行变量到~/.bashrc末尾
export PATH=$PATH:/usr/local/mpich2/bin/
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/mpich2/lib
export MANPATH=$MANPATH:/usr/local/mpich2/share/man然后拷贝/usr/local/mpich2整个目录到集群其他节点对应的位置，如果机器太多建议还是nfs之类的共享吧，否则某个软件改一下，所有机器又要重新拷贝一遍。
再然后就是配置ssh互信了。
ssh-keygen -t rsa
ssh-copy-id uos@192.168.5.249
ssh-copy-id uos@192.168.5.230 #本机IP也要拷贝
#完成拷贝后，直接ssh 192.168.5.249 或者 ssh 192.168.5.230验证看是否能免密登陆
配置完成后，跑个mpich2自带的跑圆周率计算的程序
cd /home/uos/Downloads/mpich-4.0.3/examples
#注意每个节点的这个mpich的源码业要拷贝过去。
echo "192.168.5.230" >> nodes
echo "192.168.5.249" >> nodes
mpiexec -f nodes -n 2 ./cpiopenblas
下载的时候看了下，刚好这最后一版本还支持FT2000了，正好。
tar zxf OpenBLAS-0.3.21.tar.gz
cd OpenBLAS-0.3.21/
sudo make PREFIX=/usr/local/openblas/ installHPL
HPL的编译主要是mpi库和blas库的路径配置一下，设置下编译器，直接从解压的源码目录setup下面拷贝一个配置文件到源码根目录并改名为Make.FT2000-CBLAS做修改，这个名字后面编译需要用到，我修改后的配置如下：
#
# -- High Performance Computing Linpack Benchmark (HPL)
# HPL - 2.3 - December 2, 2018
# Antoine P. Petitet
# University of Tennessee, Knoxville
# Innovative Computing Laboratory
# (C) Copyright 2000-2008 All Rights Reserved
#
# -- Copyright notice and Licensing terms:
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions, and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# 3. All advertising materials mentioning features or use of this
# software must display the following acknowledgement:
# This product includes software developed at the University of
# Tennessee, Knoxville, Innovative Computing Laboratory.
#
# 4. The name of the University, the name of the Laboratory, or the
# names of its contributors may not be used to endorse or promote
# products derived from this software without specific written
# permission.
#
# -- Disclaimer:
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY
# OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# ######################################################################
#
# ----------------------------------------------------------------------
# - shell --------------------------------------------------------------
# ----------------------------------------------------------------------
#
SHELL = /bin/sh
#
CD = cd
CP = cp
LN_S = ln -s
MKDIR = mkdir
RM = /bin/rm -f
TOUCH = touch
#
# ----------------------------------------------------------------------
# - Platform identifier ------------------------------------------------
# ----------------------------------------------------------------------
#
ARCH = FT2000-CBLAS
#
# ----------------------------------------------------------------------
# - HPL Directory Structure / HPL library ------------------------------
# ----------------------------------------------------------------------
#
TOPdir = /home/uos/Downloads/hpl-2.3
INCdir = $(TOPdir)/include
BINdir = $(TOPdir)/bin/$(ARCH)
LIBdir = $(TOPdir)/lib/$(ARCH)
#
HPLlib = $(LIBdir)/libhpl.a
#
# ----------------------------------------------------------------------
# - Message Passing library (MPI) --------------------------------------
# ----------------------------------------------------------------------
# MPinc tells the C compiler where to find the Message Passing library
# header files, MPlib is defined to be the name of the library to be
# used. The variable MPdir is only used for defining MPinc and MPlib.
#
MPdir = /usr/local/mpich2
MPinc = -I$(MPdir)/include
MPlib = $(MPdir)/lib/libmpi.so
#
# ----------------------------------------------------------------------
# - Linear Algebra library (BLAS or VSIPL) -----------------------------
# ----------------------------------------------------------------------
# LAinc tells the C compiler where to find the Linear Algebra library
# header files, LAlib is defined to be the name of the library to be
# used. The variable LAdir is only used for defining LAinc and LAlib.
#
LAdir = /usr/local/openblas
LAinc = -I$(LAdir)/include
LAlib = $(LAdir)/lib/libopenblas_ft2000p-r0.3.21.a
#
# ----------------------------------------------------------------------
# - F77 / C interface --------------------------------------------------
# ----------------------------------------------------------------------
# You can skip this section if and only if you are not planning to use
# a BLAS library featuring a Fortran 77 interface. Otherwise, it is
# necessary to fill out the F2CDEFS variable with the appropriate
# options. **One and only one** option should be chosen in **each** of
# the 3 following categories:
#
# 1) name space (How C calls a Fortran 77 routine)
#
# -DAdd_ : all lower case and a suffixed underscore (Suns,
# Intel, ...), [default]
# -DNoChange : all lower case (IBM RS6000),
# -DUpCase : all upper case (Cray),
# -DAdd__ : the FORTRAN compiler in use is f2c.
#
# 2) C and Fortran 77 integer mapping
#
# -DF77_INTEGER=int : Fortran 77 INTEGER is a C int, [default]
# -DF77_INTEGER=long : Fortran 77 INTEGER is a C long,
# -DF77_INTEGER=short : Fortran 77 INTEGER is a C short.
#
# 3) Fortran 77 string handling
#
# -DStringSunStyle : The string address is passed at the string loca-
# tion on the stack, and the string length is then
# passed as an F77_INTEGER after all explicit
# stack arguments, [default]
# -DStringStructPtr : The address of a structure is passed by a
# Fortran 77 string, and the structure is of the
# form: struct {char *cp; F77_INTEGER len;},
# -DStringStructVal : A structure is passed by value for each Fortran
# 77 string, and the structure is of the form:
# struct {char *cp; F77_INTEGER len;},
# -DStringCrayStyle : Special option for Cray machines, which uses
# Cray fcd (fortran character descriptor) for
# interoperation.
#
F2CDEFS =
#
# ----------------------------------------------------------------------
# - HPL includes / libraries / specifics -------------------------------
# ----------------------------------------------------------------------
#
HPL_INCLUDES = -I$(INCdir) -I$(INCdir)/$(ARCH) $(LAinc) $(MPinc)
HPL_LIBS = $(HPLlib) $(LAlib) $(MPlib)
#
# - Compile time options -----------------------------------------------
#
# -DHPL_COPY_L force the copy of the panel L before bcast;
# -DHPL_CALL_CBLAS call the cblas interface;
# -DHPL_CALL_VSIPL call the vsip library;
# -DHPL_DETAILED_TIMING enable detailed timers;
#
# By default HPL will:
# *) not copy L before broadcast,
# *) call the BLAS Fortran 77 interface,
# *) not display detailed timing information.
#
HPL_OPTS = -DHPL_CALL_CBLAS
#
# ----------------------------------------------------------------------
#
HPL_DEFS = $(F2CDEFS) $(HPL_OPTS) $(HPL_INCLUDES)
#
# ----------------------------------------------------------------------
# - Compilers / linkers - Optimization flags ---------------------------
# ----------------------------------------------------------------------
#
CC = /usr/bin/gcc
CCNOOPT = $(HPL_DEFS)
CCFLAGS = $(HPL_DEFS) -fomit-frame-pointer -O3 -funroll-loops
#
# On some platforms, it is necessary to use the Fortran linker to find
# the Fortran internals used in the BLAS library.
#
LINKER = /usr/bin/gfortran
LINKFLAGS = $(CCFLAGS) -lpthread
#
ARCHIVER = ar
ARFLAGS = r
RANLIB = echo
#
# ----------------------------------------------------------------------
主要是修改TOPdir MPdir LAdir LINKER LINKFLAGS几个位置，编译的时候报错，LINKFLAGS 后面需要添加lpthread
修改完成后直接 make arch=FT2000-CBLAS ,编译完成后可执行程序在bin/FT2000-CBLAS/下，主要是xhpl HPL.dat 两个文件。做测试的时候调整的参数都在HPL.dat 文件里面。
可以不用修改直接运行测试跑一下，
cd bin/FT2000-CBLAS/
mpirun -n 4 ./xhpl如果没报错，说明安装正常。接下来绝大部分时间都需要慢慢调HPL.dat 里面的参数了，当然MPI以及BLAS库的优化业是必不可少的。
调参数未完待续
HPL Tuninghttps://netlib.org/benchmark/hpl/tuning.html
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