[9fans] 9vx il has slight speed advantage

[9fans] 9vx il has slight speed advantage

[erik quanstrom]

first from il
; time cat gs>/dev/null
0.00u 0.00s 9.70r 	 cat gs

next via tcp
; time cat /386/bin/gs>/dev/null
0.00u 0.00s 40.27r 	 cat /386/bin/gs

- erik

Re: [9fans] 9vx il has slight speed advantage

[Devon H. O'Dell]

2008/12/23 erik quanstrom <quanstro@quanstro.net>:
> first from il
> ; time cat gs>/dev/null
> 0.00u 0.00s 9.70r        cat gs
>
> next via tcp
> ; time cat /386/bin/gs>/dev/null
> 0.00u 0.00s 40.27r       cat /386/bin/gs

I wonder if this is because of the timer in 9vx being less granular
and causing the TCP timer processes to fire late -- thus having to
deal with retransmits?

--dho

> - erik
>
>

Re: [9fans] 9vx il has slight speed advantage

[erik quanstrom]

> 2008/12/23 erik quanstrom <quanstro@quanstro.net>:
> > first from il
> > ; time cat gs>/dev/null
> > 0.00u 0.00s 9.70r        cat gs
> >
> > next via tcp
> > ; time cat /386/bin/gs>/dev/null
> > 0.00u 0.00s 40.27r       cat /386/bin/gs
>
> I wonder if this is because of the timer in 9vx being less granular
> and causing the TCP timer processes to fire late -- thus having to
> deal with retransmits?

msec timing isn't good enough?  i really doubt it.

- erik

Re: [9fans] 9vx il has slight speed advantage

[erik quanstrom]

> 2008/12/23 erik quanstrom <quanstro@quanstro.net>:
> > first from il
> > ; time cat gs>/dev/null
> > 0.00u 0.00s 9.70r        cat gs
> >
> > next via tcp
> > ; time cat /386/bin/gs>/dev/null
> > 0.00u 0.00s 40.27r       cat /386/bin/gs
>
> I wonder if this is because of the timer in 9vx being less granular
> and causing the TCP timer processes to fire late -- thus having to
> deal with retransmits?

il is using the same timer.

- erik

Re: [9fans] 9vx il has slight speed advantage

[Russ Cox]

On Mon, Dec 22, 2008 at 9:32 PM, erik quanstrom <quanstro@quanstro.net> wrote:
> first from il
> ; time cat gs>/dev/null
> 0.00u 0.00s 9.70r        cat gs
>
> next via tcp
> ; time cat /386/bin/gs>/dev/null
> 0.00u 0.00s 40.27r       cat /386/bin/gs

what about the host tcp?

Re: [9fans] 9vx il has slight speed advantage

[erik quanstrom]

> On Mon, Dec 22, 2008 at 9:32 PM, erik quanstrom <quanstro@quanstro.net> wrote:
>> first from il
>> ; time cat gs>/dev/null
>> 0.00u 0.00s 9.70r        cat gs
>>
>> next via tcp
>> ; time cat /386/bin/gs>/dev/null
>> 0.00u 0.00s 40.27r       cat /386/bin/gs
>
> what about the host tcp?

ftp is the easiest test i have.  i hope this is
close enough for a useful comparison.

ftp> get gs /tmp/gs
local: /tmp/gs remote: gs
200 Data port is tcp!192.168.0.4!53473
150 Opening data connection for /386/bin/gs (tcp!192.168.0.4!53473)
226 Transfer complete
13275174 bytes received in 1.24 secs (1e+04 Kbytes/sec)

- erik

Re: [9fans] 9vx il has slight speed advantage

[andrey mirtchovski]

i have a slightly unrelated question: what do you get if you use 'fcp'
instead of 'cp' for the same file over tcp and il?

thanks

Re: [9fans] 9vx il has slight speed advantage

[erik quanstrom]

> i have a slightly unrelated question: what do you get if you use 'fcp'
> instead of 'cp' for the same file over tcp and il?
>
> thanks

great question.  unfortunately a power problem has reconfigured
my network for me and i can't generate comparable numbers just
yet.

- erik