85 lines
2.6 KiB
Java
85 lines
2.6 KiB
Java
/**
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Copyright (C) powturbo 2013-2023
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GPL v2 License
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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- homepage : https://sites.google.com/site/powturbo/
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- github : https://github.com/powturbo
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- twitter : https://twitter.com/powturbo
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- email : powturbo [_AT_] gmail [_DOT_] com
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**/
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// icbench - "Integer Compression" Java Critical Native Interface
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/* Usage: (make java/jicbench)
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1 - generate header jic.h
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$ cd TurboPFor/java
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$ javah -jni jic
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$ cp jic.h ..
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2 - Compile jic and jicbench
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$ javac jic.java
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$ javac jicbench.java
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3 - compile & link a shared library
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$ cd ..
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$ gcc -O3 -w -march=native -fstrict-aliasing -m64 -shared -fPIC -I/usr/lib/jvm/default-java/include -I/usr/lib/jvm/default-java/include/linux bitpack.c bitunpack.c vp4c.c vp4d.c vsimple.c vint.c bitutil.c jic.c -o libic.so
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$ Search "/usr/lib/" for the file "jni.h" and replace the JDK name "default-java" if necessary (example by "java-8-openjdk-amd64").
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4 - copy "libic.so" to java library directory
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5 - start jicbench
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$java jicbench
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*/
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class jicbench {
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// Note: this is a simple interface test not a real benchmark
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public static void main(String args[]) {
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int bnum = 12500;
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jic ic = new jic();
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final int[] in = new int[bnum];
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final byte[] out = new byte[bnum*4];
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// final byte[] out = new byte[bnum*4*5/3+1024];
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final int[] cpy = new int[bnum];
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for (int i = 0; i < bnum; ++i) {
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in[i] = i;
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cpy[i] = 0;
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}
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long t0 = System.currentTimeMillis();
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ic.p4nenc32(in, bnum, out);
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long t = System.currentTimeMillis() - t0;
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System.out.println("encode time'" + t + "'");
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t0 = System.currentTimeMillis();
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ic.p4ndec32(out, bnum, cpy);
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t = System.currentTimeMillis() - t0;
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System.out.println("decode time'" + t + "'");
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for (int i = 0; i < bnum; ++i) {
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if(in[i] != cpy[i]) {
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System.err.println("Error at'" + i + "'");
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System.exit(1);
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}
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}
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System.out.println("check pass");
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}
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}
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