qwwdfsad

package org.qwwdfsad.benchmarks;

import com.google.gson.Gson;
import org.openjdk.jmh.annotations.*;

import java.util.concurrent.TimeUnit;

@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@Threads(8)

qwwdfsad

32 stripes, 8u72, 32-cores Xeon with disabled hyper-threading

taskset -c 0-3 java -jar microbenchmarks.jar CountersBenchmark -bm avgt -tg 1,3
 
Benchmark                        (counterType)  Mode  Cnt    Score    Error  Units
CountersBenchmark.rw                AtomicLong  avgt   20  108.288 ±  9.195  ns/op
CountersBenchmark.rw:get            AtomicLong  avgt   20   27.755 ±  4.454  ns/op
CountersBenchmark.rw:inc            AtomicLong  avgt   20  135.132 ± 10.859  ns/op
CountersBenchmark.rw                 LongAdder  avgt   20   48.061 ±  1.584  ns/op
CountersBenchmark.rw:get             LongAdder  avgt   20   75.350 ±  3.876  ns/op

qwwdfsad

Code:
[Entry Point]
[Constants]
  # {method} {0x0000000125c23120} 'inc' '()V' in 'org/jctools/counters/FixedSizeStripedLongCounterV8'
  #           [sp+0x30]  (sp of caller)
  0x000000010c7de2a0: mov    0x8(%rsi),%r10d
  0x000000010c7de2a4: shl    $0x3,%r10
  0x000000010c7de2a8: cmp    %r10,%rax
  0x000000010c7de2ab: jne    0x000000010c6e6e20  ;   {runtime_call}
  0x000000010c7de2b1: data32 xchg %ax,%ax

qwwdfsad

package ru.qwwdfsad.benchmarks;

import org.apache.lucene.util.OpenBitSet;
import org.openjdk.jmh.annotations.*;

import java.util.BitSet;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.TimeUnit;

@BenchmarkMode(Mode.Throughput)

qwwdfsad

package ru.qwwdfsad.benchmarks;

import org.apache.lucene.util.OpenBitSet;
import org.openjdk.jmh.annotations.*;

import java.util.BitSet;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.TimeUnit;

@BenchmarkMode(Mode.Throughput)

qwwdfsad

diff --git a/src/share/vm/gc/g1/g1EvacFailure.cpp b/src/share/vm/gc/g1/g1EvacFailure.cpp
--- a/src/share/vm/gc/g1/g1EvacFailure.cpp
+++ b/src/share/vm/gc/g1/g1EvacFailure.cpp
@@ -216,14 +216,14 @@
   }
 
   bool doHeapRegion(HeapRegion *hr) {
-    bool during_initial_mark = _g1h->collector_state()->during_initial_mark_pause();
-    bool during_conc_mark = _g1h->collector_state()->mark_in_progress();
-

qwwdfsad

# Run complete. Total time: 00:04:12

Benchmark            (power)  Mode  Cnt   Score    Error  Units
PowBenchmark2.cross        2  avgt    5   3.318 ±  0.257  ns/op
PowBenchmark2.cross        3  avgt    5   3.929 ±  0.362  ns/op
PowBenchmark2.cross        4  avgt    5   5.105 ±  0.329  ns/op
PowBenchmark2.cross        5  avgt    5   6.392 ±  0.888  ns/op
PowBenchmark2.cross        6  avgt    5   6.109 ±  0.910  ns/op
PowBenchmark2.cross        7  avgt    5   6.497 ±  0.800  ns/op
PowBenchmark2.cross        8  avgt    5   6.791 ±  0.862  ns/op

qwwdfsad

package org.qwwdfsad.benchmarks

import org.openjdk.jmh.annotations.*
import java.util.concurrent.TimeUnit

/**
 * @author Tolstopyatov Vsevolod
 * @since 29/09/16
 */
@Fork(value = 2) //jvmArgsAppend = arrayOf("-XX:TieredStopAtLevel=1"))

qwwdfsad

package org.qwwdfsad.benchmarks;

import org.openjdk.jmh.annotations.*;

import java.util.concurrent.TimeUnit;
import java.util.stream.IntStream;

/**
 * @author Tolstopyatov Vsevolod
 * @since 01/10/16

qwwdfsad

import java.util.Arrays;
import java.util.List;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.TimeUnit;
import java.util.function.Supplier;


public class Main {

  volatile Object consumer;