growisofs / system load / dma setting

growisofs / system load / dma setting

[Thomas Fritzsche]

Hi Linux-Hackers,

I posted this message first to the cdwriter mailing list (
http://www.mail-archive.com/cdwrite%40other.debian.org/msg07041.html )
but they told me this is a kernel problem, thus I post it here again.
Because I had this DVD-Device running without problem in 2.6.8 I can
exclude that it's a cabel/hw-problem.

Thanks and regards,
 Thomas Fritzsche
---------------------------------------
Hi all,

I'm using growisofs -Z /dev/hdc=/link/to/iso.iso to burn DVD-Video's. This
works, BUT the system load is very high while burning. I'l checked DMA
setting but DMA is on (and 32 bit). I googled around but can not find a
solution. I tried again and found that after burning dma is off!? I
checked dmesg and found message:
--------------------------------------
hdc: irq timeout: status=0xd0 { Busy }
hdc: irq timeout: error=0xd0LastFailedSense 0x0d
hdc: DMA disabled
hdc: ATAPI reset complete
--------------------------------------
I tested a few times and sometimes only the system load is very high but
DMA  is still set after the run, but often DMA setting is disabled and I
get the message above.

My system configuration is:

uname -a
Linux vdr.noto.de 2.4.27-ctvdr-1 #1 Fri Oct 15 18:38:29 UTC 2004 i686
GNU/Linux

hdparm -i /dev/hdc


/dev/hdc:

 Model=_NEC DVD_RW ND-3500AG, FwRev=2.16, SerialNo=
 Config={ Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
 RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
 BuffType=unknown, BuffSize=0kB, MaxMultSect=0
 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
 IORDY=yes, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4
 DMA modes:  mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 *udma2
 AdvancedPM=no

 * signifies the current active mode

------------------------------

Is this a growisofs problem or a kernel problem? What causes this trouble?
What can I do to avoid this problems.

Thanks for any help and kind regards,
 Thomas Fritzsche

Re: growisofs / system load / dma setting

[Bill Davidsen]

Thomas Fritzsche wrote:
> Hi Linux-Hackers,
> 
> I posted this message first to the cdwriter mailing list (
> http://www.mail-archive.com/cdwrite%40other.debian.org/msg07041.html )
> but they told me this is a kernel problem, thus I post it here again.
> Because I had this DVD-Device running without problem in 2.6.8 I can
> exclude that it's a cabel/hw-problem.
> 
> Thanks and regards,
>  Thomas Fritzsche
> ---------------------------------------
> Hi all,
> 
> I'm using growisofs -Z /dev/hdc=/link/to/iso.iso to burn DVD-Video's. This
> works, BUT the system load is very high while burning. I'l checked DMA
> setting but DMA is on (and 32 bit). I googled around but can not find a
> solution. I tried again and found that after burning dma is off!? I
> checked dmesg and found message:
> --------------------------------------
> hdc: irq timeout: status=0xd0 { Busy }
> hdc: irq timeout: error=0xd0LastFailedSense 0x0d
> hdc: DMA disabled
> hdc: ATAPI reset complete
> --------------------------------------
> I tested a few times and sometimes only the system load is very high but
> DMA  is still set after the run, but often DMA setting is disabled and I
> get the message above.
> 
> My system configuration is:
> 
> uname -a
> Linux vdr.noto.de 2.4.27-ctvdr-1 #1 Fri Oct 15 18:38:29 UTC 2004 i686
> GNU/Linux
> 
> hdparm -i /dev/hdc
> 
> 
> /dev/hdc:
> 
>  Model=_NEC DVD_RW ND-3500AG, FwRev=2.16, SerialNo=
>  Config={ Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
>  RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
>  BuffType=unknown, BuffSize=0kB, MaxMultSect=0
>  (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
>  IORDY=yes, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
>  PIO modes:  pio0 pio1 pio2 pio3 pio4
>  DMA modes:  mdma0 mdma1 mdma2
>  UDMA modes: udma0 udma1 *udma2
>  AdvancedPM=no
> 
>  * signifies the current active mode
> 
> ------------------------------
> 
> Is this a growisofs problem or a kernel problem? What causes this trouble?
> What can I do to avoid this problems.

Do you have any automounter daemon running? All the window managers are 
really bad about this, even when told not to do that, they do (under 
some conditions I haven't isolated).

Try it running with X down (console mode). If the problem goes away you 
have a start, if not track the system with "vmstat 1" and post a screen 
or two.

-- 
    -bill davidsen (davidsen@tmr.com)
"The secret to procrastination is to put things off until the
  last possible moment - but no longer"  -me

Re: growisofs / system load / dma setting

[Thomas Fritzsche]

Hi Bill,

I don't have X or an automounter running. I also tried to stop the running
vdr but nothing changed.
Here is the output of "vmstat 1":
procs -----------memory---------- ---swap-- -----io---- --system--
----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy
id wa
 1  1    288   5024   8720 405068    0    0     0     0 3708  1258  0 25
75  0
 1  1    288   5024   8720 405068    0    0     0     0 3711  1074  0 20
80  0
 1  1    288   5016   8728 405068    0    0     0   208 3746  1019  0 22
78  0
 0  1    288   5016   8728 405068    0    0     0     0 3673   969  0 15
85  0
 1  1    288   5016   8728 405068    0    0     0     0 3663  1049  0 24
76  0
 1  1    288   5016   8728 405068    0    0     0     0 3719  1152  2 21
77  0
 1  1    288   5016   8728 405068    0    0     0     0 3716  1114  0 18
82  0
 1  1    288   5008   8736 405068    0    0     0    80 3711  1141  0 23
77  0
 0  1    288   5008   8736 405068    0    0     0     0 3674  1033  0 19
81  0
 1  1    288   5008   8736 405068    0    0     0     0 3682  1015  4 25
71  0
 1  1    288   5008   8736 405068    0    0     0     0 3708  1012  0 21
79  0
 1  1    288   5008   8736 405068    0    0     0     0 3713  1043  0 17
83  0
 1  1    288   5000   8744 405068    0    0     0    80 3720  1011  0 29
71  0
 1  1    288   5000   8744 405068    0    0     0     0 3610  1033  1 20
79  0
 1  1    288   4680   8744 405388    0    0   320     0 2955   958  0 42
58  0
 1  1    288   4680   8744 405388    0    0     0     0 2451   881  1 50
49  0
 2  0    288   4464   8720 405656    0    0  2364     0 2562   843  0 50
50  0
 2  0    288   4208   8560 406076    0  128  6016   220  930   632  0 96 
4  0
 3  0    288   5124   8452 405268    0    0  5632     0 1048   813  3 87
10  0
 3  0    288   4276   8224 406344    0    0  5760     0 1075   818  1 91 
8  0
 3  0    288   4392   8040 406396    0    0  5640     0 1057   823  2 94 
4  0
procs -----------memory---------- ---swap-- -----io---- --system--
----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy
id wa
 4  0    288   5180   7816 405852    0    0  5636     0 1072   835  2 84
14  0
 3  0    288   4532   7760 406552    0    0  5640   144 1108   887  1 85
14  0
 3  0    288   4672   7704 406476    0    0  5636     0 1103   872  1 86
13  0
 3  0    288   4812   7676 406368    0    0  5636     0 1119   902  1 86
13  0
 4  0    288   4876   7668 406248    0    0  5640     0 1131   889  2 92 
6  0
 3  0    288   4944   7656 406256    0    0  5636     0 1092   829  9 85 
6  0
 1  0    288   4956   7664 406244    0    0  5740   140 1123   905  1 90 
9  0
 3  0    288   4980   7652 406236    0    0  5664     0 1047  2231  9 89 
2  0
 3  0    288   5000   7640 406240    0    0  5636     0 1060  2351  9 91 
0  0
 4  0    288   4876   7612 406384    0    0  5640     0 1011  2196 11 89 
0  0
 3  0    288   4776   7600 406500    0    0  5636     0 1076  1591  8 92 
0  0
 4  0    288   4768   7604 406500    0    0  5636   112 1099  1883  8 92 
0  0
 3  0    288   4932   7596 406356    0    0  5512     0 1130  2497  8 92 
0  0
 3  0    288   4808   7580 406492    0    0  5764     0 1091  1816  6 94 
0  0
 4  0    288   4684   7572 406624    0    0  5768     0 1117  2155 10 90 
0  0
 6  0    288   4584   7544 406620    0    0  5636     0 1150  1837 10 90 
0  0
 4  0    288   4592   7548 406736    0    0  5636   100 1090  1262 12 88 
0  0
 4  0    288   4596   7540 406744    0    0  5640     0 1128  1598 11 89 
0  0
 4  0    288   4600   7528 406756    0    0  5636     0 1134  1454  8 92 
0  0


This is the begin of a DVD recording as you can see the system load "si"
is going up to 80%-90%.

Thanks and regards,
 Thomas Fritzsche


>> Is this a growisofs problem or a kernel problem? What causes this
>> trouble?
>> What can I do to avoid this problems.
>
> Do you have any automounter daemon running? All the window managers are
> really bad about this, even when told not to do that, they do (under
> some conditions I haven't isolated).
>
> Try it running with X down (console mode). If the problem goes away you
> have a start, if not track the system with "vmstat 1" and post a screen
> or two.