Difference between 6.2 and 7.0 Adaptec 39320D - 7.0 performing less

Goodevening lists,

I am toying with Freebsd 7 to see if it will and how it runs
on my new Asus 
M2N mainboard. One of the things I noticed is that when
running 
7.0-Current-200704 the throughput of the SCSI drive seems
halved. When 
running 6.2 throughput is doubled/normal.

Throughput is measured with the following command.

dd if=/dev/zero of=/usr/test
where /usr resides on da0s1f

On 7.0 I get about 33MB/sec
On 6.2 I get about 69Mb/sec

I did not make any changes, installation is fresh from CD
with Minimal as 
distribution.

As the NIC is not yet supported by Freebsd and I haven't got
it working yet 
(need to get a supported nic in, hopefully tomorrow or the
day after) I can 
only provide the below information. I had to type it reading
it from another 
console :( (this also means that I cannot CVS atm)

If I need to raise a PR or something else for this please
let me know, as I am 
new to this process. If you require more information please
let me know as 
well, I am happy to provide.

Kind regards,

Patrick Gelsema
__________________________________

System Details:
mainboard: Asus M2N
processor: AMD Athlon 64X2 4800+
memory: 2GB
chipset: NVidia MCP6

logs read from console when running: 7.0-Current-200704

ahd0: <Adaptec 39320D Ultra320 SCSI adapter> port
0xe800-0xe8ff,0xe400-0xe4ff 
mem 0xdd7fe000-0xdd7fffff irq 16 at devuce 10.0 on pci1
ahd0: [GIANT-LOCKED]
ahd0: [ITHREAD]
aic7902: Ultra320 Wide Channel A, SCSI Id=7, PCI 33 or
66Mhz, 512 SCBs
da0 at ahd0 bus 0 target 4 lun 0
da0: <SEAGATE ST336753LW HPS2> Fixed Direct Access
SCSI-3 device
da0: 160.000MB/s transfers (80.000MHz DT, offset 63, 16
bit)
da0: Command Queueing Enabled
da0: 34732MB (71132960 512 byte sectors: 255H 63S/T 4427C)

logs read from console when running: 6.2 Release #0

ahd0: <Adaptec 39320D Ultra320 SCSI adapter> port
0xe800-0xe8ff,0xe400-0xe4ff 
mem 0xdd7fe000-0xdd7fffff irq 16 at devuce 10.0 on pci1
ahd0: [GIANT-LOCKED]
ahd0: [ITHREAD]
aic7902: Ultra320 Wide Channel A, SCSI Id=7, PCI 33 or
66Mhz, 512 SCBs
da0 at ahd0 bus 0 target 4 lun 0
da0: <SEAGATE ST336753LW HPS2> Fixed Direct Access
SCSI-3 device
da0: 320.000MB/s transfers (160.000MHz DT, offset 63, 16
bit), Tagged Queueing 
Enabled
da0: 34732MB (71132960 512 byte sectors: 255H 63S/T 4427C)

On Mon, Apr 16, 2007 at 10:47:24PM +0200, Gelsema, P
(Patrick) wrote:
> Goodevening lists,
> 
> I am toying with Freebsd 7 to see if it will and how it
runs on my new Asus 
> M2N mainboard. One of the things I noticed is that when
running 
> 7.0-Current-200704 the throughput of the SCSI drive
seems halved. When 
> running 6.2 throughput is doubled/normal.
> 
> Throughput is measured with the following command.
> 
> dd if=/dev/zero of=/usr/test
> where /usr resides on da0s1f
> 
> On 7.0 I get about 33MB/sec
> On 6.2 I get about 69Mb/sec
> 
> I did not make any changes, installation is fresh from
CD with Minimal as 
> distribution.

Apparently you weren't paying attention during boot, because
7.0 ships
with heavy debugging options enabled, and tells you about it
up front:

     "WARNING: WITNESS option enabled, expect reduced
performance.n";

Recompile your kernel with debugging options disabled before
making
performance comparisons.

Kris

On Tue, April 17, 2007 08:11, Ed Schouten wrote:
> * Gelsema, P (Patrick) <gelsemapsuperhero.nl> wrote:
>> As the NIC is not yet supported by Freebsd and I
haven't got it working
>> yet
>> (need to get a supported nic in, hopefully tomorrow
or the day after) I
>> can
>> only provide the below information. I had to type
it reading it from
>> another
>> console :( (this also means that I cannot CVS atm)
>
> 	http:
//people.freebsd.org/~yongari/nfe/if_nfe.c
> 	ht
tp://people.freebsd.org/~yongari/nfe/if_nfereg.h
> 	ht
tp://people.freebsd.org/~yongari/nfe/if_nfevar.h
>
> Just replace the original files in /sys/dev/nfe with
these ones.
>
> --
>  Ed Schouten <edfxq.nl>
>  WWW: http://g-rave.nl/

Hi Ed,

thanks for the files. Will these be MFC-ed (is that the
proper word?) into
6.3 release or committed into 7?

If not and I cvsup my src do I need to replace the files
again in the
above mentioned directory?

Thanks a lot!

Patrick

>

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On Tue, April 17, 2007 01:03, Kris Kennaway wrote:
> On Mon, Apr 16, 2007 at 10:47:24PM +0200, Gelsema, P
(Patrick) wrote:
>> Goodevening lists,
>>
>> I am toying with Freebsd 7 to see if it will and
how it runs on my new
>> Asus
>> M2N mainboard. One of the things I noticed is that
when running
>> 7.0-Current-200704 the throughput of the SCSI drive
seems halved. When
>> running 6.2 throughput is doubled/normal.
>>
>> Throughput is measured with the following command.
>>
>> dd if=/dev/zero of=/usr/test
>> where /usr resides on da0s1f
>>
>> On 7.0 I get about 33MB/sec
>> On 6.2 I get about 69Mb/sec
>>
>> I did not make any changes, installation is fresh
from CD with Minimal
>> as
>> distribution.
>
> Apparently you weren't paying attention during boot,
because 7.0 ships
> with heavy debugging options enabled, and tells you
about it up front:
>
>      "WARNING: WITNESS option enabled, expect
reduced performance.n";
>
> Recompile your kernel with debugging options disabled
before making
> performance comparisons.
>
> Kris
>

Ok, what you are saying makes sense. I did see the warnings
and the bits
in the kernel config. The thing that triggered me was that
when paying
attention during boot the SCSI Disk was detected as only
160.00MB/s
instead of the expected 320.00MB/s. The detection of devices
is not
subject to debugging, is it?

Excerpts from log.

Freebsd 7
da0: <SEAGATE ST336753LW HPS2> Fixed Direct Access
SCSI-3 device
da0: 160.000MB/s transfers (80.000MHz DT, offset 63, 16
bit)
da0: Command Queueing Enabled

Freebsd 6.2
da0: <SEAGATE ST336753LW HPS2> Fixed Direct Access
SCSI-3 device
da0: 320.000MB/s transfers (160.000MHz DT, offset 63, 16
bit), Tagged
Queueing Enabled

Thanks,

Patrick

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On Tue, Apr 17, 2007 at 01:12:06PM +0200, Gelsema, P
(Patrick) - FreeBSD wrote:
> On Tue, April 17, 2007 01:03, Kris Kennaway wrote:
> > On Mon, Apr 16, 2007 at 10:47:24PM +0200, Gelsema,
P (Patrick) wrote:
> >> Goodevening lists,
> >>
> >> I am toying with Freebsd 7 to see if it will
and how it runs on my new
> >> Asus
> >> M2N mainboard. One of the things I noticed is
that when running
> >> 7.0-Current-200704 the throughput of the SCSI
drive seems halved. When
> >> running 6.2 throughput is doubled/normal.
> >>
> >> Throughput is measured with the following
command.
> >>
> >> dd if=/dev/zero of=/usr/test
> >> where /usr resides on da0s1f
> >>
> >> On 7.0 I get about 33MB/sec
> >> On 6.2 I get about 69Mb/sec
> >>
> >> I did not make any changes, installation is
fresh from CD with Minimal
> >> as
> >> distribution.
> >
> > Apparently you weren't paying attention during
boot, because 7.0 ships
> > with heavy debugging options enabled, and tells
you about it up front:
> >
> >      "WARNING: WITNESS option enabled, expect
reduced performance.n";
> >
> > Recompile your kernel with debugging options
disabled before making
> > performance comparisons.
> >
> > Kris
> >
> 
> Ok, what you are saying makes sense. I did see the
warnings and the bits
> in the kernel config. The thing that triggered me was
that when paying
> attention during boot the SCSI Disk was detected as
only 160.00MB/s
> instead of the expected 320.00MB/s. The detection of
devices is not
> subject to debugging, is it?

Someone else pointed this out to me, to be honest I didn't
get that
far in your email after noticing the big blunder of leaving
debugging
enabled 

I agree that the different speed negotiation is a likely
potential
cause of poor performance as well, but it really doesn't
make sense to
be making performance comparisons when one system has all
possible
debugging enabled and the other has no debugging enabled.

Kris

On Tue, Apr 17, 2007 at 01:16:05PM +0200, Gelsema, P
(Patrick) - FreeBSD wrote:
 > On Tue, April 17, 2007 08:11, Ed Schouten wrote:
 > > * Gelsema, P (Patrick) <gelsemapsuperhero.nl> wrote:
 > >> As the NIC is not yet supported by Freebsd
and I haven't got it working
 > >> yet
 > >> (need to get a supported nic in, hopefully
tomorrow or the day after) I
 > >> can
 > >> only provide the below information. I had to
type it reading it from
 > >> another
 > >> console :( (this also means that I cannot CVS
atm)
 > >
 > > 	http:
//people.freebsd.org/~yongari/nfe/if_nfe.c
 > > 	ht
tp://people.freebsd.org/~yongari/nfe/if_nfereg.h
 > > 	ht
tp://people.freebsd.org/~yongari/nfe/if_nfevar.h
 > >
 > > Just replace the original files in /sys/dev/nfe
with these ones.
 > >
 > > --
 > >  Ed Schouten <edfxq.nl>
 > >  WWW: http://g-rave.nl/
 > 
 > Hi Ed,
 > 
 > thanks for the files. Will these be MFC-ed (is that
the proper word?) into
 > 6.3 release or committed into 7?
 > 

Firstly, it needs to be committed to HEAD.
It's up to nfe(4) maintainer, obrien. I don't want to replace
it with overhauld nfe(4) without permission of offical
maintainer.

 > If not and I cvsup my src do I need to replace the
files again in the
 > above mentioned directory?
 > 

Yes.

-- 
Regards,
Pyun YongHyeon
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