* Re: 2.4.x high irq contention
@ 2003-04-22 18:44 Chuck Ebbert
0 siblings, 0 replies; 6+ messages in thread
From: Chuck Ebbert @ 2003-04-22 18:44 UTC (permalink / raw)
To: linux-kernel
>> Won't help a lot. If its all IRQ load (eg lots of multicast streaming
>> audio small frames) then you want an eepro100 or something similar that
>> has interrupt mitigators.
>
> Well, handwaving about the network load/type ;-)
> Could as well be two RTL back-to-back, normal packets but high bandwidth.
> (watch collisions for this case :-)
RTL-8139: the hardware equivalent of a bicycle.
8))
------
Chuck
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: 2.4.x high irq contention
2003-04-22 13:47 ` Alan Cox
@ 2003-04-22 17:50 ` Stephan von Krawczynski
0 siblings, 0 replies; 6+ messages in thread
From: Stephan von Krawczynski @ 2003-04-22 17:50 UTC (permalink / raw)
To: Alan Cox; +Cc: casus, linux-kernel
On 22 Apr 2003 14:47:53 +0100
Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> On Maw, 2003-04-22 at 11:40, Stephan von Krawczynski wrote:
> > I don't know much about your network load, but if you have a lot, then you
> > should probably throw away the 8139 network card and use tulip or 3com
> > instead.
>
> Won't help a lot. If its all IRQ load (eg lots of multicast streaming
> audio small frames) then you want an eepro100 or something similar that
> has interrupt mitigators.
Well, handwaving about the network load/type ;-)
Could as well be two RTL back-to-back, normal packets but high bandwidth.
(watch collisions for this case :-)
Regards,
Stephan
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: 2.4.x high irq contention
2003-04-22 10:40 ` Stephan von Krawczynski
@ 2003-04-22 13:47 ` Alan Cox
2003-04-22 17:50 ` Stephan von Krawczynski
0 siblings, 1 reply; 6+ messages in thread
From: Alan Cox @ 2003-04-22 13:47 UTC (permalink / raw)
To: Stephan von Krawczynski; +Cc: Anton Petrusevich, Linux Kernel Mailing List
On Maw, 2003-04-22 at 11:40, Stephan von Krawczynski wrote:
> I don't know much about your network load, but if you have a lot, then you
> should probably throw away the 8139 network card and use tulip or 3com instead.
Won't help a lot. If its all IRQ load (eg lots of multicast streaming
audio small frames) then you want an eepro100 or something similar that
has interrupt mitigators.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: 2.4.x high irq contention
2003-04-22 3:32 Anton Petrusevich
@ 2003-04-22 10:40 ` Stephan von Krawczynski
2003-04-22 13:47 ` Alan Cox
0 siblings, 1 reply; 6+ messages in thread
From: Stephan von Krawczynski @ 2003-04-22 10:40 UTC (permalink / raw)
To: Anton Petrusevich; +Cc: linux-kernel
I don't know much about your network load, but if you have a lot, then you
should probably throw away the 8139 network card and use tulip or 3com instead.
Regards,
Stephan
On Tue, 22 Apr 2003 10:32:01 +0700
Anton Petrusevich <casus@mail.ru> wrote:
> Hi people,
>
> This is 2.4.21-pre4aa3, but the same applies to 2.4.20-vanilla, and i
> think to any 2.4.x. The NIC is RTL-8139(8139too). I would really like to
> know what could be done in this situation. The machine (p3-1GHz) is almost
> unrespobsible. Yes, there are really network card interrupts. So, here it
> goes.
> # readprofile -m /boot/System.map | sort -nr +2 | head -20
> 2600 handle_IRQ_event 23.2143
> 268 system_call 4.7857
> 184 fget 3.8333
> 123 sock_poll 2.5625
> 421 kfree 2.1927
> 101 __free_pages 2.1042
> 288 do_softirq 2.0000
> 326 skb_copy_and_csum_dev 1.8523
> 56 restore_fpu 1.7500
> 232 send_sig_info 1.6111
> 123 poll_freewait 1.5375
> 174 __wake_up 1.3594
> 695 do_schedule 1.2776
> 19 sockfs_delete_dentry 1.1875
> 70 del_timer 1.0938
> 592 save_i387 1.0278
> 17 ret_from_sys_call 1.0000
> 111 skb_release_data 0.9911
> 58 __generic_copy_to_user 0.9062
> 115 do_pollfd 0.8984
>
> --
> Anton Petrusevich
>
> -
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^ permalink raw reply [flat|nested] 6+ messages in thread
* 2.4.x high irq contention
@ 2003-04-22 10:12 Chuck Ebbert
0 siblings, 0 replies; 6+ messages in thread
From: Chuck Ebbert @ 2003-04-22 10:12 UTC (permalink / raw)
To: Anton Petrusevich; +Cc: linux-kernel
> This is 2.4.21-pre4aa3, but the same applies to 2.4.20-vanilla, and i
> think to any 2.4.x. The NIC is RTL-8139(8139too). I would really like to
> know what could be done in this situation.
Get a real network card. ;)
I found two used Compaq NC-3121 (Intel e100) for $15 each...
------
Chuck
^ permalink raw reply [flat|nested] 6+ messages in thread
* 2.4.x high irq contention
@ 2003-04-22 3:32 Anton Petrusevich
2003-04-22 10:40 ` Stephan von Krawczynski
0 siblings, 1 reply; 6+ messages in thread
From: Anton Petrusevich @ 2003-04-22 3:32 UTC (permalink / raw)
To: linux-kernel
Hi people,
This is 2.4.21-pre4aa3, but the same applies to 2.4.20-vanilla, and i
think to any 2.4.x. The NIC is RTL-8139(8139too). I would really like to
know what could be done in this situation. The machine (p3-1GHz) is almost
unrespobsible. Yes, there are really network card interrupts. So, here it goes.
# readprofile -m /boot/System.map | sort -nr +2 | head -20
2600 handle_IRQ_event 23.2143
268 system_call 4.7857
184 fget 3.8333
123 sock_poll 2.5625
421 kfree 2.1927
101 __free_pages 2.1042
288 do_softirq 2.0000
326 skb_copy_and_csum_dev 1.8523
56 restore_fpu 1.7500
232 send_sig_info 1.6111
123 poll_freewait 1.5375
174 __wake_up 1.3594
695 do_schedule 1.2776
19 sockfs_delete_dentry 1.1875
70 del_timer 1.0938
592 save_i387 1.0278
17 ret_from_sys_call 1.0000
111 skb_release_data 0.9911
58 __generic_copy_to_user 0.9062
115 do_pollfd 0.8984
--
Anton Petrusevich
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2003-04-22 18:36 UTC | newest]
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2003-04-22 10:40 ` Stephan von Krawczynski
2003-04-22 13:47 ` Alan Cox
2003-04-22 17:50 ` Stephan von Krawczynski
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