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Thu, 29 Jan 2015 06:19:00 GMT

#!/bin/bash
#date:2015-01-29
#author:zhangtao
#desc:stop the service by given service-name
######################################################
SERVICE_NAME=imgate
WATCHDOG_NAME=startimgate.sh
#######################################
function stopService()
{
        PROCESS_NAME=$1

        PIDS=`ps axu | grep $PROCESS_NAME | grep -v "grep" | awk '{print $2}'`
        PIDNUM=0

        for PID in $PIDS
        do
                echo "IsKilled : $PROCESS_NAME : $PID"
                kill -9 $PID
                let PIDNUM=$PIDNUM+1
        done

        if [ $PIDNUM == 0 ] ;then
                echo "NotFound : $PROCESS_NAME"
        else
                echo "FoundNum : $PROCESS_NAME : $PIDNUM"
        fi

        echo "-------"
        return
}
####################################
function printPrompt()
{
        read -p ">>>:you must input 'yes' to continue:" choice
        [ "$choice" != "yes" ] && echo ">>>: not yes,so exit" && exit 0
        echo ">>>:yes,continue"
}

#####################################
function main()
{
        printPrompt

        #set -x
        echo ""

        PROCESS_ARRAY=($WATCHDOG_NAME $SERVICE_NAME)
        echo "length of process_array :${#PROCESS_ARRAY[@]}"

        echo "============"
        for PROCESS in ${PROCESS_ARRAY[@]};
        do
                stopService $PROCESS
        done

        echo "---->finished"

}

main

长寿�?/a> 2015-01-29 14:19 发表评论

Tue, 20 Jan 2015 09:41:00 GMT

��试机：(x��) amd 两核�?�Q�客��L(f��ng)��与服务端都在本机上跑�?/span>

�|�络层：(x��)A�c�epoll�U�程处理accept的被动连接；

B�c�epoll�U�程处理connect的主动连接；

C�c�epoll�U�程把A或B�c�epoll�U�程得到的连接分配到某个�U�程�Q�专门处理send和recv操作�Q?/span>

D�cȝ��E�池处理C�c�L��出来的数据，处理完之后，再投递到C�cȝ��E�做send操作�?/span>

用ab��试短连�?/span>

ab -n 1000 -c 150 http://127.0.0.1:8090/

��试20�ơ之后，得到一个峰值tps=6000

用字节的写的��Z��数据echo��试的压力测试程序测试长�q�接�Q?/span>

client发出64字节数据�Q�echosvrd�q�回64字节�Q�client又发�?4字节�?/span>

每次传输�|�络传输数据�?4字节以下的情况下�Q?nbsp;

./stree_client 127.0.0.1 8090 100 得到tps=13851

./stree_client 127.0.0.1 8090 1000 得到tps=16641

./stree_client 127.0.0.1 8090 10000 得到tps=16600 service cpu跑到90%�Q�始�l�在90%以下�Q�stree_client的cpu跑到32%左右�Q?/span>

./stree_client 127.0.0.1 8090 20000 stree_client的cpu跑到100%告终

./stree_client 127.0.0.1 8090 15000 stree_client的cpu跑到100%告终

把日志的输出�U�别调到1�Q�此时基本无日志输出�Q?/span>

./stree_client 127.0.0.1 8090 10000 得到tps=29436 service cpu跑到70%�Q�stree_client的cpu跑到48%左右�Q?/span>

./stree_client 127.0.0.1 8090 15000 stree_client的cpu跑到100%告终

再把�|�络传输的字节调整�ؓ(f��)128字节左右�Q?/span>

./stree_client 127.0.0.1 8090 10000 得到tps=29179 service cpu跑到68%�Q�stree_client的cpu跑到45%左右�Q?/span>

�l�论�Q?/span>

在本机测试，��忽略了(ji��n)�|�络io时�g�Q�得到网�l�引擎cpu跑到100%时的tps�?不超�q?0000�Q�或者不偏离30000很远�Q?/span>

此时�q�发�q�接数在10000

长寿�?/a> 2015-01-20 17:41 发表评论

Sun, 09 Nov 2014 13:56:00 GMT

首先使用下面命��o(h��)获取�q�接本服务到的ip列表�?

netstat -anp|egrep 80|egrep "EST"|awk '{print $(NF-2)}' |cut -f 1 -d ":"

然后用python写一个脚本实现通过IP获取归属地�?br />

长寿�?/a> 2014-11-09 21:56 发表评论

Mon, 09 Jun 2014 13:11:00 GMT

�~�译Linux c++代码的几个问�?br />

1.c++��目�U�L��C��同版本的linux�q�_��Q�需要重新编译一�ơ。可能�ƈ不能��利地编译通过�Q?br /> 问题可能出现�Q�gcc�~�译器的版本�Q�较高版的，对语法的��(g��)查更加的严格�Q�遇到的问题是，
include文�g的依赖，template语法的声明，所依赖的系�l�库的缺失，�?4位系�l�下�~�译
32位程序等�{��?br />
2./usr/bin/ld: cannot find -lstdc++ 解决

sudo yum search "static" |grep "$libc\|stdc\+\+$"

��搜索到到包�Q�安装上��p��?ji��n)�?/p>

3.x86_64 Linux Error: gnu/stub-32.h

Fix for the RHEL/CentOS 5.x for GCC gnu/stub-32.h missing error
Type the following yum command:
# yum -y install glibc-devel.i386
Fix for the RHEL/CentOS 6.x for GCC gnu/stub-32.h missing error
Type the following yum command:
# yum -y install glibc-devel.i686 glibc-devel

��L(f��ng)��(ch��)引帮助文档：(x��)
http://www.cyberciti.biz/faq/x86_64-linux-error-gnustub-32h-missing-error-and-solution/

4. uuid/uuid.h 找不�?/p>

yum -y install libuuid-devel

长寿�?/a> 2014-06-09 21:11 发表评论

Thu, 24 Apr 2014 05:15:00 GMT

export LANG=zh_CN.UTF-8

长寿�?/a> 2014-04-24 13:15 发表评论

/usr/bin/ld: cannot find -lstdc++ 解决

Sat, 19 Apr 2014 16:51:00 GMT

sudo yum search "static" |grep "$libc\|stdc\+\+$"

��搜索到到包�Q�安装上��p��?ji��n)�?/div>

长寿�?/a> 2014-04-20 00:51 发表评论