hikoma

3 Concurrent Objects （並行オブジェクト）

この章では並行オブジェクトの correctness と progress を規定する様々な方法を学ぶ。

correctness の3つタイプ

• Quiescent consistency
  • 弱い制約。ハイパフォーマンスを必要とするシステムに使える
• Sequential consistency

hikoma

@set CHAINLP_DIR=C:\ChainLP40b12
@set CHAINLP=%CHAINLP_DIR%\ChainLP.exe
@set SETTING=%CHAINLP_DIR%\%~n0.ini
@set OUTPUT_DIR=%~dp0

@for %%f in (%*) do "%CHAINLP%" -b -ini "%SETTING%" -i %%f -o "%OUTPUT_DIR%\%%~nf.cbz"

hikoma

import java.io.IOException;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;

hikoma

-- http://dev.mysql.com/doc/refman/5.5/en/partitioning-linear-hash.html
DELIMITER $$
DROP FUNCTION IF EXISTS linearHashing$$
CREATE FUNCTION linearHashing(value INT, num INT) RETURNS INT DETERMINISTIC
BEGIN
  SET @v := POWER(2, CEILING(LOG(2, num)));
  SET @n := value & (@v - 1);
  IF @n >= num THEN
    SET @v := CEILING(@v / 2);
    SET @n := @n & (@v - 1);

hikoma

DROP TABLE IF EXISTS t;
CREATE TABLE t (
  id INT NOT NULL AUTO_INCREMENT,
  x INT NOT NULL,
  y INT NOT NULL,
  z INT NOT NULL,
  PRIMARY KEY (id)
) ENGINE=InnoDB ROW_FORMAT=DYNAMIC;

DELIMITER $$

hikoma

#!/bin/bash                                                                                                                           

threshold=${1-95}
now=$(date '+%Y-%m-%d %H:%M:%S')
cache=()

jps -q | xargs ps hH k -pcpu o pid,lwp,pcpu,args \
  | awk "\$3 >= $threshold" | while read line; do

  array=($(echo "$line"))