Linux Cache

腾讯云主机最低配置CPU信息 Xeon X3440 2.53Ghz主频 4MB缓存

[root@VM_27_135_centos ~]# cat /proc/cpuinfo
 processor : 0
 vendor_id : GenuineIntel
 cpu family : 6
 model : 30
 model name : Intel(R) Xeon(R) CPU X3440 @ 2.53GHz
 stepping : 5
 cpu MHz : 2526.998
 cache size : 4096 KB
 physical id : 0
 siblings : 1
 core id : 0
 cpu cores : 1
 apicid : 0
 initial apicid : 0
 fpu : yes
 fpu_exception : yes
 cpuid level : 11
 wp : yes
 flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc up arch_perfmon rep_good unfair_spinlock pni ssse3 cx16 sse4_1 sse4_2 popcnt hypervisor lahf_lm
 bogomips : 5053.99
 clflush size : 64
 cache_alignment : 64
 address sizes : 40 bits physical, 48 bits virtual
 power management:

阿里云主机最低配置CPU信息
[root@AY1405192126447871b3Z ~]# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 45
model name : Intel(R) Xeon(R) CPU E5-2430 0 @ 2.20GHz
stepping : 7
cpu MHz : 2200.095
cache size : 15360 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush mmx fxsr sse sse2 ht syscall nx lm up rep_good unfair_spinlock pni ssse3 cx16 sse4_1 sse4_2 popcnt aes hypervisor lahf_lm
bogomips : 4400.19
clflush size : 64
cache_alignment : 64
address sizes : 46 bits physical, 48 bits virtual
power management:

[root@AY1405192126447871b3Z ~]#

查看demsg确认使用的虚拟化技术平台
[root@VM_27_135_centos ~]# dmesg |grep xen
[root@VM_27_135_centos ~]# dmesg |grep kvm
kvm-clock: Using msrs 4b564d01 and 4b564d00
kvm-clock: cpu 0, msr 0:1c257c1, boot clock
kvm-clock: cpu 0, msr 0:22167c1, primary cpu clock
kvm-stealtime: cpu 0, msr 220e880
Switching to clocksource kvm-clock
[root@VM_27_135_centos ~]#
[root@AY1405192126447871b3Z ~]# dmesg |grep xen
CPU: CPU feature rdtscp disabled on xen guest
CPU: CPU feature constant_tsc disabled on xen guest
xen-platform-pci 0000:00:03.0: PCI INT A -> GSI 28 (level, low) -> IRQ 28
[root@AY1405192126447871b3Z ~]# dmesg |grep kvm
[root@AY1405192126447871b3Z ~]#

[root@VM_27_135_centos ~]#

腾讯云主机为单网卡，主机无公网IP绑定
[root@VM_27_135_centos ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 52:54:00:D3:AD:AD
inet addr:10.142.27.135 Bcast:10.142.27.255 Mask:255.255.255.0
inet6 addr: fe80::5054:ff:fed3:adad/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:25968 errors:0 dropped:0 overruns:0 frame:0
TX packets:21664 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:190788488 (181.9 MiB) TX bytes:10550093 (10.0 MiB)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:200 (200.0 b) TX bytes:200 (200.0 b)

[root@VM_27_135_centos ~]#

阿里云主机为双网卡，分别绑定公网IP和私网IP(阿里云北京节点)
[root@AY1405192126447871b3Z ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:16:3E:00:3B:C0
inet addr:10.162.222.113 Bcast:10.162.223.255 Mask:255.255.240.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:83246285 errors:0 dropped:0 overruns:0 frame:0
TX packets:81922830 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:25346599332 (23.6 GiB) TX bytes:25324814074 (23.5 GiB)
Interrupt:165

eth1 Link encap:Ethernet HWaddr 00:16:3E:00:3B:C2
inet addr:182.92.x.xx Bcast:182.92.11.255 Mask:255.255.252.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:131305480 errors:0 dropped:0 overruns:0 frame:0
TX packets:793230 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:6117093526 (5.6 GiB) TX bytes:270508082 (257.9 MiB)
Interrupt:164

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:68664 errors:0 dropped:0 overruns:0 frame:0
TX packets:68664 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:5239997 (4.9 MiB) TX bytes:5239997 (4.9 MiB)

[root@AY1405192126447871b3Z ~]#
默认CentOS6.3 x86_64系统 默认内核版本和执行yum update后的内核版本
[root@VM_27_135_centos ~]# uname -ar
Linux VM_27_135_centos 2.6.32-279.el6.x86_64 #1 SMP Fri Jun 22 12:19:21 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
[root@VM_27_135_centos ~]#

[root@VM_27_135_centos ~]# uname -ar
Linux VM_27_135_centos 2.6.32-431.20.3.el6.centos.plus.x86_64 #1 SMP Thu Jun 19 23:04:15 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
[root@VM_27_135_centos ~]#
在本地本机ping www.qq.com的延时（深圳电信100M光纤ADSL）
harveymei@linux-7zyd:~> ping -c 6 www.qq.com
PING www.qq.com (14.17.32.211) 56(84) bytes of data.
64 bytes from 14.17.32.211: icmp_seq=1 ttl=55 time=2.16 ms
64 bytes from 14.17.32.211: icmp_seq=2 ttl=55 time=3.60 ms
64 bytes from 14.17.32.211: icmp_seq=3 ttl=55 time=3.57 ms
64 bytes from 14.17.32.211: icmp_seq=4 ttl=55 time=3.72 ms
64 bytes from 14.17.32.211: icmp_seq=5 ttl=55 time=4.98 ms
64 bytes from 14.17.32.211: icmp_seq=6 ttl=55 time=3.03 ms

— www.qq.com ping statistics —
6 packets transmitted, 6 received, 0% packet loss, time 5005ms
rtt min/avg/max/mdev = 2.160/3.515/4.988/0.846 ms
harveymei@linux-7zyd:~>

在qcloud（腾讯云华南广州节点1Mbps）主机上ping www.qq.com的延时
[root@VM_27_135_centos ~]# ping -c 6 www.qq.com
PING www.qq.com (183.60.15.153) 56(84) bytes of data.
64 bytes from 183.60.15.153: icmp_seq=1 ttl=51 time=11.2 ms
64 bytes from 183.60.15.153: icmp_seq=2 ttl=51 time=11.2 ms
64 bytes from 183.60.15.153: icmp_seq=3 ttl=51 time=11.2 ms
64 bytes from 183.60.15.153: icmp_seq=4 ttl=51 time=11.2 ms
64 bytes from 183.60.15.153: icmp_seq=5 ttl=51 time=11.2 ms
64 bytes from 183.60.15.153: icmp_seq=6 ttl=51 time=11.2 ms

— www.qq.com ping statistics —
6 packets transmitted, 6 received, 0% packet loss, time 5018ms
rtt min/avg/max/mdev = 11.202/11.242/11.272/0.109 ms
[root@VM_27_135_centos ~]#

[root@VM_27_135_centos ~]# ping -c 6 www.qq.com
PING www.qq.com (14.17.32.211) 56(84) bytes of data.
64 bytes from 14.17.32.211: icmp_seq=1 ttl=50 time=10.6 ms
64 bytes from 14.17.32.211: icmp_seq=2 ttl=50 time=10.3 ms
64 bytes from 14.17.32.211: icmp_seq=3 ttl=50 time=10.5 ms
64 bytes from 14.17.32.211: icmp_seq=4 ttl=50 time=10.5 ms
64 bytes from 14.17.32.211: icmp_seq=5 ttl=50 time=10.5 ms
64 bytes from 14.17.32.211: icmp_seq=6 ttl=50 time=10.5 ms

— www.qq.com ping statistics —
6 packets transmitted, 6 received, 0% packet loss, time 5019ms
rtt min/avg/max/mdev = 10.391/10.549/10.639/0.154 ms
[root@VM_27_135_centos ~]#

在阿里云北京节点1Mbps主机上ping www.qq.com的延时
[root@AY1405192126447871b3Z ~]# ping -c 6 www.qq.com
PING www.qq.com (61.135.157.156) 56(84) bytes of data.
64 bytes from 61.135.157.156: icmp_seq=1 ttl=52 time=5.76 ms
64 bytes from 61.135.157.156: icmp_seq=2 ttl=52 time=5.55 ms
64 bytes from 61.135.157.156: icmp_seq=3 ttl=52 time=5.72 ms
64 bytes from 61.135.157.156: icmp_seq=4 ttl=52 time=5.69 ms
64 bytes from 61.135.157.156: icmp_seq=5 ttl=52 time=5.69 ms
64 bytes from 61.135.157.156: icmp_seq=6 ttl=52 time=5.62 ms

— www.qq.com ping statistics —
6 packets transmitted, 6 received, 0% packet loss, time 5014ms
rtt min/avg/max/mdev = 5.550/5.674/5.760/0.091 ms
[root@AY1405192126447871b3Z ~]#
可以ping通内部网络非本人账户下其他主机或设备
[root@VM_27_135_centos ~]# ping -c 2 10.142.27.136
PING 10.142.27.136 (10.142.27.136) 56(84) bytes of data.
From 10.142.27.135 icmp_seq=1 Destination Host Unreachable
From 10.142.27.135 icmp_seq=2 Destination Host Unreachable

— 10.142.27.136 ping statistics —
2 packets transmitted, 0 received, +2 errors, 100% packet loss, time 3000ms
pipe 2
[root@VM_27_135_centos ~]# ping -c 2 10.142.27.135
PING 10.142.27.135 (10.142.27.135) 56(84) bytes of data.
64 bytes from 10.142.27.135: icmp_seq=1 ttl=64 time=0.024 ms
64 bytes from 10.142.27.135: icmp_seq=2 ttl=64 time=0.028 ms

— 10.142.27.135 ping statistics —
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.024/0.026/0.028/0.002 ms
[root@VM_27_135_centos ~]# ping -c 2 10.142.27.134
PING 10.142.27.134 (10.142.27.134) 56(84) bytes of data.
64 bytes from 10.142.27.134: icmp_seq=1 ttl=64 time=1.15 ms
64 bytes from 10.142.27.134: icmp_seq=2 ttl=64 time=0.501 ms

— 10.142.27.134 ping statistics —
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 0.501/0.827/1.154/0.327 ms
[root@VM_27_135_centos ~]# ping -c 2 10.142.27.129
PING 10.142.27.129 (10.142.27.129) 56(84) bytes of data.
64 bytes from 10.142.27.129: icmp_seq=1 ttl=64 time=2.35 ms
64 bytes from 10.142.27.129: icmp_seq=2 ttl=64 time=0.699 ms

— 10.142.27.129 ping statistics —
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 0.699/1.529/2.359/0.830 ms
[root@VM_27_135_centos ~]#

阿里云香港节点基础电信运营商名气通新闻稿

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