* how many msi (msi-x) vectors can be setup?
@ 2010-05-19 15:18 zhou rui
2010-05-19 20:33 ` Yinghai Lu
0 siblings, 1 reply; 4+ messages in thread
From: zhou rui @ 2010-05-19 15:18 UTC (permalink / raw)
To: netdev
hi there:
how many msi (msi-x) vectors can be setup?
the number is limited by hardware resource(nic), or kernel ?
I found that the driver (broadcom 57711 ver 1.5.12) tried to request
16 queues on my kernel2.6.27,but only 2 available
will it be increased if I update the driver or kernel?
and there is a limitiation in the system? if the other devices have
already occupied too many MSI vectors then it is not enough.
thanks
rui
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: how many msi (msi-x) vectors can be setup?
2010-05-19 15:18 how many msi (msi-x) vectors can be setup? zhou rui
@ 2010-05-19 20:33 ` Yinghai Lu
2010-05-20 2:04 ` zhou rui
0 siblings, 1 reply; 4+ messages in thread
From: Yinghai Lu @ 2010-05-19 20:33 UTC (permalink / raw)
To: zhou rui; +Cc: netdev
On Wed, May 19, 2010 at 8:18 AM, zhou rui <wirelesser@gmail.com> wrote:
> hi there:
> how many msi (msi-x) vectors can be setup?
> the number is limited by hardware resource(nic), or kernel ?
> I found that the driver (broadcom 57711 ver 1.5.12) tried to request
> 16 queues on my kernel2.6.27,but only 2 available
> will it be increased if I update the driver or kernel?
> and there is a limitiation in the system? if the other devices have
> already occupied too many MSI vectors then it is not enough.
from kernel 2.6.19 x86_64, there is per-cpu vector irq support.
depends your system : CPU num? 64bit or 32bit.
YH
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: how many msi (msi-x) vectors can be setup?
2010-05-19 20:33 ` Yinghai Lu
@ 2010-05-20 2:04 ` zhou rui
2010-05-20 2:53 ` Yinghai
0 siblings, 1 reply; 4+ messages in thread
From: zhou rui @ 2010-05-20 2:04 UTC (permalink / raw)
To: Yinghai Lu; +Cc: netdev
it is kernel2.6.27, Intel(R) Xeon(R) CPU E5540,64bit,16
processors.,so there should be 16 vectors?
On Thu, May 20, 2010 at 4:33 AM, Yinghai Lu <yinghai@kernel.org> wrote:
> On Wed, May 19, 2010 at 8:18 AM, zhou rui <wirelesser@gmail.com> wrote:
>> hi there:
>> how many msi (msi-x) vectors can be setup?
>> the number is limited by hardware resource(nic), or kernel ?
>> I found that the driver (broadcom 57711 ver 1.5.12) tried to request
>> 16 queues on my kernel2.6.27,but only 2 available
>> will it be increased if I update the driver or kernel?
>> and there is a limitiation in the system? if the other devices have
>> already occupied too many MSI vectors then it is not enough.
>
> from kernel 2.6.19 x86_64, there is per-cpu vector irq support.
>
> depends your system : CPU num? 64bit or 32bit.
>
> YH
>
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2010-05-20 2:54 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2010-05-19 15:18 how many msi (msi-x) vectors can be setup? zhou rui
2010-05-19 20:33 ` Yinghai Lu
2010-05-20 2:04 ` zhou rui
2010-05-20 2:53 ` Yinghai
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).