Polling slows down bandwidth

[Коньков Евгений]

Hello,
w/0 polling:


serv1# ifconfig nfe0
nfe0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=10b<RXCSUM,TXCSUM,VLAN_MTU,TSO4>
        ether 00:13:d4:ce:82:16
        inet 10.11.8.17 netmask 0xfffffc00 broadcast 10.11.11.255
        inet 10.11.15.15 netmask 0xffffff00 broadcast 10.11.15.255
        inet 10.11.8.15 netmask 0xfffffc00 broadcast 10.11.11.255
        media: Ethernet autoselect (1000baseTX <full-duplex>)
        status: active

serv2# ifconfig re0
re0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=389b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_UCAST,WOL_MCAST,WOL_MAGIC>
        ether 00:1c:c0:c8:5a:4e
        inet 192.168.255.254 netmask 0xffffffff broadcast 192.168.255.254
        media: Ethernet autoselect (1000baseTX <full-duplex>)
        status: active


serv1# systat -v
    2 users    Load  0.38  0.49  0.38                  Oct 28 23:10

Mem:KB    REAL            VIRTUAL                       VN PAGER   SWAP PAGER
        Tot   Share      Tot    Share    Free           in   out     in   out
Act  324452   20196   490400    25112  938576  count
All  346596   21060 1074286k    28104          pages
Proc:                                                            Interrupts
  r   p   d   s   w   Csw  Trp  Sys  Int  Sof  Flt        cow   29953 total
          1  47       71k   18 5022  27k 2029    1        zfod        atkbd0 1
                                                          ozfod     7 ata0 irq14
62.4%Sys  18.7%Intr  0.4%User  0.0%Nice 18.4%Idle        %ozfod 27944 nfe0 irq23
|    |    |    |    |    |    |    |    |    |    |       daefr  2001 cpu0: time
===============================++++++++++                 prcfr       igb0 256
                                         1 dtbuf        6 totfr     1 igb0 257
Namei     Name-cache   Dir-cache    100000 desvn          react       igb0 258
   Calls    hits   %    hits   %     84106 numvn          pdwak
       5       5 100                 24824 frevn          pdpgs
                                                          intrn
Disks   ad0                                        373808 wire
KB/t  16.00                                        292088 act
tps       7                                        417568 inact
MB/s   0.10                                           200 cache
%busy     0                                        938376 free

iperf result:
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.3 sec    450 MBytes    368 Mbits/sec


after enable POLLING:
serv1# ifconfig nfe0 polling
    2 users    Load  0.32  0.39  0.35                  Oct 28 23:13

Mem:KB    REAL            VIRTUAL                       VN PAGER   SWAP PAGER
        Tot   Share      Tot    Share    Free           in   out     in   out
Act  324464   20196   490656    25112  938428  count
All  346624   21060 1074286k    28104          pages
Proc:                                                            Interrupts
  r   p   d   s   w   Csw  Trp  Sys  Int  Sof  Flt        cow    2006 total
          1  47       28k   19 2691    6 2036    2        zfod        atkbd0 1
                                                          ozfod     4 ata0 irq14
24.7%Sys  18.6%Intr  0.7%User  0.0%Nice 55.9%Idle        %ozfod       nfe0 irq23
|    |    |    |    |    |    |    |    |    |    |       daefr  2001 cpu0: time
============++++++++++                                    prcfr       igb0 256
                                        10 dtbuf        2 totfr     1 igb0 257
Namei     Name-cache   Dir-cache    100000 desvn          react       igb0 258
   Calls    hits   %    hits   %     84106 numvn          pdwak
      20      20 100                 24824 frevn          pdpgs
                                                          intrn
Disks   ad0                                        373944 wire
KB/t  16.00                                        292104 act
tps       4                                        417564 inact
MB/s   0.07                                           200 cache
%busy     0                                        938228 free

I get bad results (((
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.3 sec    180 MBytes    147 Mbits/sec



-- 
                          mailto:kes-kes at yandex.ru