hdparm优化，dma设置不成功(已解决)

benkude

我不知道是那里处理问题，清帮我看看。
我也不太懂我的这快硬盘有那些应该优化，那些不应该，该有优化的最好优化到什么程度？
我在网上搜了一些帖子，外加看了hdparm的帮助，下面是我硬盘的一些信息，和我的操作，清帮我看看我的问题在那里？

1. 
   
2. # dmesg|grep hda:|more
   
3. hda: ST380011A, ATA DISK drive
   
4. hda: max request size: 128KiB
   
5. hda: 156301488 sectors (80026 MB) w/2048KiB Cache, CHS=65535/16/63
   
6. hda: cache flushes supported
   
7. hda: hda1 hda2 hda3 < hda5 hda6 hda7 hda8 >
   

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1. 
   
2. # lspci|grep -i ide
   
3. 00:09.0 IDE interface: nVidia Corporation nForce2 IDE (rev a2)
   

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1. 
   
2. # hdparm -I /dev/hda
   
3. 
   
4. /dev/hda:
   
5. 
   
6. ATA device, with non-removable media
   
7.         Model Number:       ST380011A
   
8.         Serial Number:      5JV8V08L
   
9.         Firmware Revision:  3.04
   
10. Standards:
    
11.         Used: ATA/ATAPI-6 T13 1410D revision 2
    
12.         Supported: 6 5 4 3
    
13. Configuration:
    
14.         Logical         max     current
    
15.         cylinders       16383   16383
    
16.         heads           16      16
    
17.         sectors/track   63      63
    
18.         --
    
19.         CHS current addressable sectors:   16514064
    
20.         LBA    user addressable sectors:  156301488
    
21.         device size with M = 1024*1024:       76319 MBytes
    
22.         device size with M = 1000*1000:       80026 MBytes (80 GB)
    
23. Capabilities:
    
24.         LBA, IORDY(can be disabled)
    
25.         bytes avail on r/w long: 4      Queue depth: 1
    
26.         Standby timer values: spec'd by Standard
    
27.         R/W multiple sector transfer: Max = 16  Current = 16
    
28.         Recommended acoustic management value: 128, current value: 254
    
29.         DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5
    
30.              Cycle time: min=120ns recommended=120ns
    
31.         PIO: pio0 pio1 pio2 pio3 pio4
    
32.              Cycle time: no flow control=240ns  IORDY flow control=120ns
    
33. Commands/features:
    
34.         Enabled Supported:
    
35.            *    READ BUFFER cmd
    
36.            *    WRITE BUFFER cmd
    
37.            *    Host Protected Area feature set
    
38.            *    Look-ahead
    
39.            *    Write cache
    
40.            *    Power Management feature set
    
41.                 Security Mode feature set
    
42.                 SMART feature set
    
43.            *    Mandatory FLUSH CACHE command
    
44.            *    Device Configuration Overlay feature set
    
45.            *    Automatic Acoustic Management feature set
    
46.                 SET MAX security extension
    
47.            *    DOWNLOAD MICROCODE cmd
    
48.            *    SMART self-test
    
49.            *    SMART error logging
    
50. Security:
    
51.                 supported
    
52.         not     enabled
    
53.         not     locked
    
54.         not     frozen
    
55.         not     expired: security count
    
56.         not     supported: enhanced erase
    
57. HW reset results:
    
58.         CBLID- below Vih
    
59.         Device num = 0 determined by CSEL
    
60. Checksum: correct
    

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1. 
   
2. # hdparm -Tt /dev/hda
   
3. 
   
4. /dev/hda:
   
5. Timing cached reads:   1516 MB in  2.00 seconds = 757.67 MB/sec
   
6. Timing buffered disk reads:   10 MB in  3.40 seconds =   2.94 MB/sec
   

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1. 
   
2. # hdparm -m16 /dev/hda
   
3. 
   
4. /dev/hda:
   
5. setting multcount to 16
   
6. multcount    = 16 (on)
   
7. 
   
8. # hdparm -Tt /dev/hda
   
9. 
   
10. /dev/hda:
    
11. Timing cached reads:   1452 MB in  2.00 seconds = 725.79 MB/sec
    
12. Timing buffered disk reads:   10 MB in  3.02 seconds =   3.31 MB/sec
    
13. 
    

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1. 
   
2. # hdparm -c1 /dev/hda
   
3. 
   
4. /dev/hda:
   
5. setting 32-bit IO_support flag to 1
   
6. IO_support   =  1 (32-bit)
   
7. 
   
8. # hdparm -Tt /dev/hda
   
9. /dev/hda:
   
10. Timing cached reads:   1504 MB in  2.00 seconds = 751.74 MB/sec
    
11. Timing buffered disk reads:   20 MB in  3.05 seconds =   6.56 MB/sec
    
12. 
    

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1. 
   
2. # hdparm -d1 /dev/hda
   
3. 
   
4. /dev/hda:
   
5. setting using_dma to 1 (on)
   
6. HDIO_SET_DMA failed: Operation not permitted
   
7. using_dma    =  0 (off)
   
8. # hdparm -Tt /dev/hda
   
9. 
   
10. /dev/hda:
    
11. Timing cached reads:   1272 MB in  2.00 seconds = 634.83 MB/sec
    
12. Timing buffered disk reads:   20 MB in  3.07 seconds =   6.51 MB/sec
    
13. 
    

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是我内核不支持吗？

1. 
   
2. # grep DMA /usr/src/linux-2.6.18-gentoo-r4/.config |grep -v ^#
   
3. CONFIG_GENERIC_ISA_DMA=y
   
4. CONFIG_ISA_DMA_API=y
   
5. CONFIG_BLK_DEV_IDEDMA_PCI=y
   
6. CONFIG_IDEDMA_PCI_AUTO=y
   
7. CONFIG_BLK_DEV_IDEDMA=y
   
8. CONFIG_IDEDMA_AUTO=y
   

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MerkavaIV

搭车问一下，sata需要是用hdparm优化吗？

pointer

try
hdparm -c3 /dev/hda

freethirsty

前几天也遇到该问题，重编内核解决

benkude

2. # cat /boot/config-2.6.18-gentoo-r4-new | grep DMA
3. CONFIG_GENERIC_ISA_DMA=y
4. CONFIG_ISA_DMA_API=y
5. CONFIG_BLK_DEV_IDEDMA_PCI=y
6. # CONFIG_BLK_DEV_IDEDMA_FORCED is not set
7. CONFIG_IDEDMA_PCI_AUTO=y
8. # CONFIG_IDEDMA_ONLYDISK is not set
9. CONFIG_BLK_DEV_IDEDMA=y
10. # CONFIG_IDEDMA_IVB is not set
11. CONFIG_IDEDMA_AUTO=y
12. # DMA Engine support
13. # CONFIG_DMA_ENGINE is not set
14. # DMA Clients
15. # DMA Devices

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重编内核，还是不行

freethirsty

关键是要将主板芯片编入内核
dma。。。。availe yes（记不清了）

benkude

Post by freethirsty
关键是要将主板芯片编入内核
dma。。。。availe yes（记不清了）

还是不知道是那一项？
我的内核似乎没有编译成模块的，出了声卡，和网卡。

freethirsty

http://blog.donews.com/quickmouse/archive/2005/11/18/631168.aspx

freethirsty

Device Drivers---ATA/ATAPI/MFM/RLL support-----
<*>     generic/default IDE chipset support

     PCI IDE chipset support
<*>       Generic PCI IDE Chipset Support

       Generic PCI bus-master DMA support

         Use PCI DMA by default when available
<*>         Silicon Image chipset support(我的芯片组）

benkude

多谢freethirsty，问题已经解决

原来是主板芯片选错了，这个才是我的正确配置:

2. Device Drivers---ATA/ATAPI/MFM/RLL support-----
3. [*] PCI IDE chipset support
4. <*> Generic PCI IDE Chipset Support
5. [*] Generic PCI bus-master DMA support
6. [*] Use PCI DMA by default when available
7. <*> AMD and nVidia IDE support(我的芯片组)

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驱动正确安装以后，要用hdparm修改的参数都已经自动打开：

2. # hdparm -v /dev/hda
4. /dev/hda:
5. multcount    =  0 (off)
6. IO_support   =  1 (32-bit)
7. unmaskirq    =  1 (on)
8. using_dma    =  1 (on)
9. keepsettings =  0 (off)
10. readonly     =  0 (off)
11. readahead    = 256 (on)
12. geometry     = 65535/16/63, sectors = 156301488, start = 0

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原来startx超级慢，而且硬盘嘎嘎的之叫唤。现在机器反应速度明显提高了，startx非常快，硬盘也不和我抗议了，看看现在的速度:

2. # hdparm -tT /dev/hda
4. /dev/hda:
5. Timing cached reads:   1440 MB in  2.00 seconds = 718.74 MB/sec
6. Timing buffered disk reads:  150 MB in  3.02 seconds =  49.59 MB/sec

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