Re: [LSF/MM TOPIC][LSF/MM ATTEND] NAPI polling for block drivers

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, Jan 17, 2017 at 06:38:43PM +0200, Sagi Grimberg wrote:
> 
> >Just for the record, all tests you've run are with the upper irq_poll_budget of
> >256 [1]?
> 
> Yes, but that's the point, I never ever reach this budget because
> I'm only processing 1-2 completions per interrupt.
> 
> >We (Hannes and me) recently stumbed accross this when trying to poll for more
> >than 256 queue entries in the drivers we've been testing.

s/stumbed/stumbled/

> 
> What do you mean by stumbed? irq-poll should be agnostic to the fact
> that drivers can poll more than their given budget?

So what you say is you saw a consomed == 1 [1] most of the time?

[1] from http://git.infradead.org/nvme.git/commitdiff/eed5a9d925c59e43980047059fde29e3aa0b7836

-- 
Johannes Thumshirn                                          Storage
jthumshirn@xxxxxxx                                +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [SCSI Target Devel]     [Linux SCSI Target Infrastructure]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Linux IIO]     [Samba]     [Device Mapper]

  Powered by Linux