Re: Observations on LG_NAS, mvgbe0 issue?

[Masanobu SAITOH <msaitoh%execsw.org@localhost>]

(2013/07/03 15:36), Masanobu SAITOH wrote:
> Hi,Reinoud.
>
> (2013/07/02 20:45), Reinoud Zandijk wrote:
> > Hi Robert,
> >
> > On Tue, Jul 02, 2013 at 12:29:36PM +0100, Robert Swindells wrote:
> > > Could you try setting ipginttx to 0 ?
> >
> > While setting this i am tarring a directory full of big files on the NAS's NFS
> > share creating the disc activity:
> >
> > nas# sysctl -w hw.mvgbe.mvgbe0.ipginttx=0
> > hw.mvgbe.mvgbe0.ipginttx: 768 -> 0
> > nas# iostat -w 1
> >        tty              wd0             CPU
> >   tin tout  KB/t  t/s  MB/s  us ni sy in id
> >     0    1 26.18    3 0.084   2  0  1  0 97
> >     0   76 35.97  303 10.64   2  0 29 63  6
> >     0   28 36.55  336 12.01   0  0 33 67  0
> >     0   21 38.89  315 11.97   0  0 29 71  0
> >     0   34 30.48  372 11.07   2  0 26 65  7
> >     0   22 16.55  706 11.40   0  0 30 69  2
> >     0   23 35.69  337 11.75   0  0 30 69  1
> >     0   25 36.07  321 11.32   0  0 31 64  5
> >     0   22 34.42  352 11.82   0  0 29 71  0
> >     0   30 34.87  337 11.47   0  0 36 62  2
> > ^C
> > nas# sysctl -w hw.mvgbe.mvgbe0.ipginttx=2048
> > hw.mvgbe.mvgbe0.ipginttx: 0 -> 2048
> > nas# iostat -w1
> >        tty              wd0             CPU
> >   tin tout  KB/t  t/s  MB/s  us ni sy in id
> >     0    1 26.20    3 0.084   2  0  1  0 97
> >     0  100 34.95  378 12.90   0  0 27 71  2
> >     0   27 33.57  328 10.75   1  0 29 55 15
> >     0   36 20.73  578 11.70   0  0 30 66  4
> >     0   36 16.73  752 12.30   0  0 45 53  2
> >     0   26 16.27  773 12.28   0  0 38 62  0
> >     0   24 16.22  747 11.83   0  0 27 72  1
> >     0   38 16.25  768 12.18   0  0 37 62  1
> >     0   25 17.59  601 10.33   0  0 27 51 21
> >     0   44 32.35  179 5.662   0  0 13 27 60
> >     0   44 33.60  178 5.848   0  0 13 37 50
> >     0   44 35.83  165 5.786   0  0 14 36 50
> >     0   34 17.75  643 11.15   0  0 22 67 11
> >     0   30 16.10  754 11.86   0  0 32 68  1
> >     0   26 19.43  497 9.430   0  0 25 50 25
> >
> > As you can see, no real noticable performance gain nor losses on this setting 
> > :-/
> >
> > Reinoud
>
>   Yes, I should be.

Sorry for my bad English :-|

I mean "No, the difference should not be seen."

> And if you change the value bigger,
> the performange will go down.
>
>   0) Could you show me the result of the following commands?
>
>      ifconfig -v mvgbe0
>      netstat -id    (don't forget 'd')
>
>
>   1) And then, could you modify if_mvgbe.c and test again?
>
>      MVGBE_TX_RING_CNT    256 -> 1024
>      MVGBE_RX_RING_CNT    256 -> 1024

 If this change won't solve the problem, the problem is from
NFS itself or other interrupt related problem.


>   Regards.


--
-----------------------------------------------
                SAITOH Masanobu (msaitoh%execsw.org@localhost
                                 msaitoh%netbsd.org@localhost)