package net.openhft.collections.fromdocs.pingpong_latency;
import net.openhft.affinity.AffinitySupport;
import net.openhft.collections.SharedHashMap;
import net.openhft.collections.SharedHashMapBuilder;
import net.openhft.collections.fromdocs.BondVOInterface;
import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import static net.openhft.lang.model.DataValueClasses.newDirectReference;
/* on an i7-4500 laptop.
PingPongLEFT: Timing 1 x off-heap operations on /dev/shm/RDR_DIM_Mock
#0: compareAndSwapCoupon() 50/90/99%tile was 41 / 52 / 132
#1: compareAndSwapCoupon() 50/90/99%tile was 40 / 56 / 119
#2: compareAndSwapCoupon() 50/90/99%tile was 39 / 48 / 54
#3: compareAndSwapCoupon() 50/90/99%tile was 39 / 48 / 56
#4: compareAndSwapCoupon() 50/90/99%tile was 39 / 48 / 54
#5: compareAndSwapCoupon() 50/90/99%tile was 39 / 48 / 54
#6: compareAndSwapCoupon() 50/90/99%tile was 39 / 48 / 55
#7: compareAndSwapCoupon() 50/90/99%tile was 39 / 48 / 55
#8: compareAndSwapCoupon() 50/90/99%tile was 39 / 48 / 54
#9: compareAndSwapCoupon() 50/90/99%tile was 39 / 48 / 54
*/
public class PingPongCASLeft {
public static void main(String... ignored) throws IOException {
SharedHashMap<String, BondVOInterface> shm = PingPongCASLeft.acquireSHM();
playPingPong(shm, 4, 5, true, "PingPongCASLEFT");
}
static void playPingPong(SharedHashMap<String, BondVOInterface> shm, double _coupon, double _coupon2, boolean setFirst, final String desc) {
BondVOInterface bond1 = newDirectReference(BondVOInterface.class);
BondVOInterface bond2 = newDirectReference(BondVOInterface.class);
BondVOInterface bond3 = newDirectReference(BondVOInterface.class);
BondVOInterface bond4 = newDirectReference(BondVOInterface.class);
shm.acquireUsing("369604101", bond1);
shm.acquireUsing("369604102", bond2);
shm.acquireUsing("369604103", bond3);
shm.acquireUsing("369604104", bond4);
System.out.printf("\n\n" + desc + ": Timing 1 x off-heap operations on /dev/shm/RDR_DIM_Mock\n");
if (setFirst) {
bond1.setCoupon(_coupon);
bond2.setCoupon(_coupon);
bond3.setCoupon(_coupon);
bond4.setCoupon(_coupon);
}
int timeToCallNanoTime = 30;
int runs = 1000000;
long[] timings = new long[runs];
for (int j = 0; j < 10; j++) {
for (int i = 0; i < runs; i++) {
long _start = System.nanoTime(); //
while (!bond1.compareAndSwapCoupon(_coupon, _coupon2)) ;
while (!bond2.compareAndSwapCoupon(_coupon, _coupon2)) ;
while (!bond3.compareAndSwapCoupon(_coupon, _coupon2)) ;
while (!bond4.compareAndSwapCoupon(_coupon, _coupon2)) ;
timings[i] = (System.nanoTime() - _start - timeToCallNanoTime) / 4;
}
Arrays.sort(timings);
System.out.printf("#%d: compareAndSwapCoupon() 50/90/99%%tile was %,d / %,d / %,d%n",
j, timings[runs / 2], timings[runs * 9 / 10], timings[runs * 99 / 100]);
}
}
static SharedHashMap<String, BondVOInterface> acquireSHM() throws IOException {
// ensure thread ids are globally unique.
AffinitySupport.setThreadId();
String TMP = System.getProperty("java.io.tmpdir");
return new SharedHashMapBuilder()
.generatedValueType(true)
.entries(16)
.entrySize(64).file(new File(TMP + "/BondPortfolioSHM")).kClass(String.class).vClass(BondVOInterface.class).create();
}
}