Pete French wrote:
However, ethernet at 100Mbit is 4B5B coded at a 125mhz rate. So the raw
Errr, 4B5B *is* 10 bits per byte surely?
...
Gig ether is mainly 8B10, as is Firewire, SATA, FibreChannel and a
Mind you, it assumes that you know the real bit rate, which in the
case of 100baseT is
> That was a rule of thumb in the heyday of async serial lines, which used
> a start and stop bit per byte.
>
> However, ethernet at 100Mbit is 4B5B coded at a 125mhz rate. So the raw
Errr, 4B5B *is* 10 bits per byte surely?
> Even in the later days of modems this rule applied less and less,
>
> However, ethernet at 100Mbit is 4B5B coded at a 125mhz rate. So the raw
> synchronous data rate really is 12.5Mbytes/s. Minus the sync preamble
> of 8 bytes per packet and the mandatory inter-frame-gap of 12 bytes
> that's a physical layer rate of (12.5M * (1500/(1500+20))) or 12.34Mbyte/s.
Pete French wrote:
1 megabit = 106 = 1,000,000 bits which is equal to 125,000 bytes.
you are assuming eight bits per byte - but this is a serial line so
you should use ten bits per byte instead.
-pete.
That was a rule of thumb in the heyday of async serial lines, which used
a start
On Mon, Oct 06, 2008 at 08:38:13AM -0400, Adam McDougall wrote:
> Bartosz Stec wrote:
>
BTW overall SAMBA performance still sucks on 7.1-pre as much as on
RELENG_5 ...:( - 7.5 MB/s peak.
>>>
>>> 7.5MB is 75% effeciency of a 100mbit card. Not amazing, but
>>> not "sucks".
>>>
> 1 megabit = 106 = 1,000,000 bits which is equal to 125,000 bytes.
you are assuming eight bits per byte - but this is a serial line so
you should use ten bits per byte instead.
-pete.
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Clifton Royston wrote:
On Mon, Oct 06, 2008 at 10:29:35AM +0300, Andrei Kolu wrote:
...
I remember when on FreeBSD 4.x I was able to copy files from samba and
to samba up to 12MB/s on 100Mbit lan.
This part seems unlikely, particularly as bit rates are measured in
decimal millions n
Bartosz Stec wrote:
BTW overall SAMBA performance still sucks on 7.1-pre as much as on
RELENG_5 ...:( - 7.5 MB/s peak.
7.5MB is 75% effeciency of a 100mbit card. Not amazing, but
not "sucks".
Where do you see faster performance?
Between windows machines on the same hardware or linux se
Jeremy Chadwick pisze:
On Mon, Oct 06, 2008 at 09:02:33AM +0200, Bartosz Stec wrote:
Alfred Perlstein wrote:
* Bartosz Stec <[EMAIL PROTECTED]> [081003 07:23] wrote:
Hello again :)
With POLLING enabled I experience about 10%-25% performance drop when
copying files over netw
On Mon, Oct 06, 2008 at 10:29:35AM +0300, Andrei Kolu wrote:
...
> I remember when on FreeBSD 4.x I was able to copy files from samba and
> to samba up to 12MB/s on 100Mbit lan.
This part seems unlikely, particularly as bit rates are measured in
decimal millions not computer millions.
12*8*
Jeremy Chadwick wrote:
On Mon, Oct 06, 2008 at 09:02:33AM +0200, Bartosz Stec wrote:
Alfred Perlstein wrote:
* Bartosz Stec <[EMAIL PROTECTED]> [081003 07:23] wrote:
Hello again :)
With POLLING enabled I experience about 10%-25% performance drop when
copying files over netw
On Mon, Oct 06, 2008 at 09:02:33AM +0200, Bartosz Stec wrote:
> Alfred Perlstein wrote:
>> * Bartosz Stec <[EMAIL PROTECTED]> [081003 07:23] wrote:
>>
>>> Hello again :)
>>>
>>> With POLLING enabled I experience about 10%-25% performance drop when
>>> copying files over network. Tested with bot
Alfred Perlstein wrote:
* Bartosz Stec <[EMAIL PROTECTED]> [081003 07:23] wrote:
Hello again :)
With POLLING enabled I experience about 10%-25% performance drop when
copying files over network. Tested with both SAMBA and NFS. Is it normal?
FreeBSD 7.1-PRERELEASE #0: Sat Sep 6 01:52:12
* Bartosz Stec <[EMAIL PROTECTED]> [081003 07:23] wrote:
> Hello again :)
>
> With POLLING enabled I experience about 10%-25% performance drop when
> copying files over network. Tested with both SAMBA and NFS. Is it normal?
>
>FreeBSD 7.1-PRERELEASE #0: Sat Sep 6 01:52:12 CEST 2008
>fxp
Pieter de Goeje wrote:
On Friday 03 October 2008, Bartosz Stec wrote:
Hello again :)
With POLLING enabled I experience about 10%-25% performance drop when
copying files over network. Tested with both SAMBA and NFS. Is it normal?
Yes. You don't want to use polling unless you set kern.hz to 100
On Friday 03 October 2008, Bartosz Stec wrote:
> Hello again :)
>
> With POLLING enabled I experience about 10%-25% performance drop when
> copying files over network. Tested with both SAMBA and NFS. Is it normal?
Yes. You don't want to use polling unless you set kern.hz to 1 or
something in
Hello again :)
With POLLING enabled I experience about 10%-25% performance drop when
copying files over network. Tested with both SAMBA and NFS. Is it normal?
FreeBSD 7.1-PRERELEASE #0: Sat Sep 6 01:52:12 CEST 2008
fxp0: port 0xc800-0xc83f mem
0xe1021000-0xe1021fff irq 20 at device
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