mysqlslap

mysql_real_connect (mysql=0x7ffff0000a10, host=0x7fffffffe74c "127.0.0.1", user=0x7fffffffe740 "root",
    passwd=0x975610 "", db=0x482322 "mysqlslap", port=3306, unix_socket=0x0, client_flag=2147680256)
    at /root/mysql-5.6.27/sql-common/client.c:3824
3824        mysql_close_free(mysql);
(gdb)
3825        if (!(client_flag & CLIENT_REMEMBER_OPTIONS))
(gdb)
3828      DBUG_RETURN(0);
(gdb)
3829    }
(gdb)
slap_connect (mysql=0x7ffff0000a10) at /root/mysql-5.6.27/client/mysqlslap.c:2274
2274        my_sleep(connection_retry_sleep);
(gdb) bt
#0  slap_connect (mysql=0x7ffff0000a10) at /root/mysql-5.6.27/client/mysqlslap.c:2274
#1  0x000000000040f181 in run_task (p=0x7fffffffdcb0) at /root/mysql-5.6.27/client/mysqlslap.c:1872
#2  0x0000003d9fa07851 in start_thread () from /lib64/libpthread.so.0
#3  0x0000003d9f6e767d in clone () from /lib64/libc.so.6

http://blog.sina.com.cn/s/blog_4d3ff0eb0102uzz8.html