机器在淘宝买的
安装win7和ubuntu 14.04LTS双系统，win7盗版的被反盗版后用不了，很久没用了
ubuntu安装的时候我不记得有没有设置swap分区了
在ubuntu下，用chrome的时候，打开标签多了，就容易卡，有时候还会变灰色死十几秒，几十秒的
用eclipse java开发就更卡了
但是top命令看进程占CPU或者mem情况，发现并不大

刚刚在ubuntu下将home下的10几G的文件复制到windows分区的D盘下
发现速度才6-8M/s
这个速度是不是太慢了？

是不是硬盘有问题所以导致卡？
或者没有设置SWAP分区（这个如何查看是否设置了？）？
或者其他问题？譬如CPU啥的
如何检测啊？

谢谢

估计就是硬盘太慢了导致的
你可以使用dstat命令，看“wait”那一列的数值是不是很高，那一列基本就是等待硬盘的cpu，我用的ssd，“wait”基本为0

你说的 wait 是指 total cpu usage 下面的wai 吗？

----total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system--
usr sys idl wai hiq siq| read writ| recv send| in out | int csw

你是退出所有运行的程序后再运行这个命令？
多大数值表示硬盘很差？

附件里的磁盘实用工具，可以测试一下硬盘的性能，参考： http://teliute.org/linux/TeUbt/lesson25/lesson25.html

GSmartControl output是这样, 磁盘有啥问题吗？

smartctl 6.5 2016-01-24 r4214 [x86_64-linux-4.4.0-38-generic] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family: Western Digital Blue Mobile
Device Model: WDC WD5000LPVX-08V0TT5
Serial Number: WD-WX31A3416253
LU WWN Device Id: 5 0014ee 6af2489b9
Firmware Version: 05.01A05
User Capacity: 500,107,862,016 bytes [500 GB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 5400 rpm
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-2 (minor revision not indicated)
SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Wed Oct 5 07:44:55 2016 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status: (0x00) Offline data collection activity
was never started.
Auto Offline Data Collection: Disabled.
Self-test execution status: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: ( 9120) seconds.
Offline data collection
capabilities: (0x7b) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
command.
Offline surface scan supported.
Self-test supported.
Conveyance Self-test supported.
Selective Self-test supported.
SMART capabilities: (0x0003) Saves SMART data before entering
power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x01) Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 104) minutes.
Conveyance self-test routine
recommended polling time: ( 5) minutes.
SCT capabilities: (0x7035) SCT Status supported.
SCT Feature Control supported.
SCT Data Table supported.

SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail Always - 0
3 Spin_Up_Time 0x0027 154 151 021 Pre-fail Always - 1266
4 Start_Stop_Count 0x0032 099 099 000 Old_age Always - 1678
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0
7 Seek_Error_Rate 0x002f 200 200 051 Pre-fail Always - 0
9 Power_On_Hours 0x0032 086 086 000 Old_age Always - 10233
10 Spin_Retry_Count 0x0032 100 100 000 Old_age Always - 0
11 Calibration_Retry_Count 0x0032 100 100 000 Old_age Always - 0
12 Power_Cycle_Count 0x0032 099 099 000 Old_age Always - 1550
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 0
193 Load_Cycle_Count 0x0032 199 199 000 Old_age Always - 4858
194 Temperature_Celsius 0x0022 098 082 000 Old_age Always - 45
196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0
197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0030 100 253 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 0
240 Head_Flying_Hours 0x0032 087 087 000 Old_age Always - 10171

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Short offline Completed without error 00% 2608 -

SMART Selective self-test log data structure revision number 1
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Not_testing
2 0 0 Not_testing
3 0 0 Not_testing
4 0 0 Not_testing
5 0 0 Not_testing
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.

插个正常的USB硬盘试试速度?
HOME下复制一份看速度如何?(怀疑是不同文件系统导致的速度下降)
有些情况下用GUI也会导致速度缓慢,可以试试用命令行来代替图形界面复制功能,看是否有所改善?

硬盘速度太几M肯定不对劲啦，你啥配置都不说

$ cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c
4 Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz


$ sudo dmidecode |grep -A 8 "System Information"
System Information
Manufacturer: LENOVO
Product Name: 62771W4
Version: ThinkPad Edge E431
Serial Number: PF1P5HX
UUID: DA69F281-52F6-11CB-9DC9-AB4A08EFD878
Wake-up Type: Power Switch
SKU Number: LENOVO_MT_6277_BU_Think_FM_ThinkPad Edge E431
Family: ThinkPad Edge E431


$ sudo dmidecode -t memory|grep Size
Size: No Module Installed
Size: 4096 MB

sudo dmidecode |grep -A16 "Memory Device$"
Memory Device
Array Handle: 0x000B
Error Information Handle: Not Provided
Total Width: Unknown
Data Width: Unknown
Size: No Module Installed
Form Factor: DIMM
Set: None
Locator: ChannelA-DIMM0
Bank Locator: BANK 0
Type: Unknown
Type Detail: None
Speed: Unknown
Manufacturer: Not Specified
Serial Number: Not Specified
Asset Tag: None
Part Number: Not Specified
--
Memory Device
Array Handle: 0x000B
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 4096 MB
Form Factor: SODIMM
Set: None
Locator: ChannelB-DIMM0
Bank Locator: BANK 2
Type: DDR3
Type Detail: Synchronous
Speed: 1600 MHz
Manufacturer: Samsung
Serial Number: 161F4DA1
Asset Tag: None
Part Number: M471B5173QH0-YK0

关闭所有程序时，



然后打开chrome，wait时间陡然上升

esolve, 很明显你这个wait已经把cpu吃完了。。。赶紧换ssd吧