dspezia

$ g++ --version
g++ (SUSE Linux) 4.5.0 20100604 [gcc-4_5-branch revision 160292]

$ g++ -std=c++0x -O2 main.cc
$ time ./a.out

real    0m33.838s
user    0m30.784s
sys     0m2.930s

dspezia

#include <iostream>
#include <tr1/unordered_map>
#include <map>
#include <set>

// 37 ms per intersection for Redis
// 29 ms per intersection for this C++ program

using namespace std;
using namespace std::tr1;

dspezia

> ~/tcp_redis_monitor.py 6379

       Timestamp     Nb     TX bytes     RX bytes           TX RMA           RX RMA
  1333983822.943      1            0            0            0.000            0.000
  1333983823.193      1            0            0            0.000            0.000
  1333983824.194      1            0            0            0.000            0.000
  1333983825.195      1            0            0            0.000            0.000
  1333983826.196      1            0            0            0.000            0.000

dspezia

#!/usr/bin/env python
# ---------------------------------------------------------

import redis

POOL = redis.ConnectionPool(host='localhost',port=6379,db=0)
   
# ---------------------------------------------------------

def main():

dspezia

/*
   Based on code provided by Sebastian Sito in stackoverflow question:
   http://stackoverflow.com/questions/9958589/async-redis-pooling-using-lib-event
*/

#include <stdlib.h>
#include <event2/event.h>
#include <event2/http.h>
#include <event2/buffer.h>
#include <hiredis/hiredis.h>

dspezia

OBJ = genload.o
BINS = genload

CC=g++
OPTIMIZATION?=-O3
CFLAGS?=$(OPTIMIZATION) $(ARCH) $(PROF) -I ../hiredis
CCLINK?=-pthread
LDFLAGS?=-L../hiredis -lhiredis -lm

OBJ = example.o

dspezia

/***************************************************************************
 *   Copyright (C) 2008 by Amadeus   *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *

dspezia

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# ----------------------------------------------------

import redis, random

POOL = redis.ConnectionPool(host='localhost', port=6379, db=0)

NUSERS = 10000
NTAGS = 500

dspezia

Dump of assembler code for function zslGetRank:

; Function prolog: save registers on the stack
   0x0000000000427fd0 <+0>:     push   %r14
   0x0000000000427fd2 <+2>:     push   %r13
   0x0000000000427fd4 <+4>:     mov    %rsi,%r13
   0x0000000000427fd7 <+7>:     push   %r12
   0x0000000000427fd9 <+9>:     push   %rbp
   0x0000000000427fda <+10>:    push   %rbx
   0x0000000000427fdb <+11>:    sub    $0x10,%rsp

dspezia

#include <iostream>
#include <vector>
#include <string>
#include <stdexcept>

#include <hiredis.h>

using namespace std;