Re: [PATCH v4 for-next] RDMA/hns: dump detailed driver-specific CQ information for hip08

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

 



On Sat, Dec 01, 2018 at 10:53:02AM +0800, liyangyang (M) wrote:
> 
> On 2018/11/30 23:56, Jason Gunthorpe wrote:
> > On Fri, Nov 30, 2018 at 03:16:23PM +0800, liyangyang (M) wrote:
> >> Hi Leon:
> >>
> >> Thanks a lot for your reply.
> >>
> >> On 2018/11/29 15:42, Leon Romanovsky wrote:
> >>> On Thu, Nov 29, 2018 at 03:30:14PM +0800, liyangyang (M) wrote:
> >>>> Hi Leon:
> >>>>
> >>>> Thanks a lot for your reply.
> >>>>
> >>>> On 2018/11/28 20:55, Leon Romanovsky wrote:
> >>>>> On Wed, Nov 28, 2018 at 08:21:29PM +0800, Tao Tian wrote:
> >>>>>> This patch adds support of resource track for hip08 and take
> >>>>>> dumping cq context state used for debugging as an example.
> >>>>>> More resources track supports for hns driver will be added in future.
> >>>>>>
> >>>>>> The output should be as follows.
> >>>>>> $ ./rdma res show cq dev hnseth0 -d
> >>>>>> dev hnseth5 cqe 5555 users 2 poll-ctx WORKQUEUE pid 0 comm [ib_core] state 2 ceq
> >>>>>> n 0 cqn 0 hopnum 1 pi 0 ci 0 maxcnt 0 period 0 cqe 0
> >>>>>
> >>>>> You have "cqe" twice, one from IB/core and another from your driver.
> >>>>> It will blow mind to everyone who will see it.
> >>>> "cqe" in my driver means "cqe_cnt", but I mistakenly abbreviated it as "cqe".
> >>>> This name will be changed to "cnt" in patch v5.
> >>>>
> >>>> The output should be as follows.
> >>>> $ ./rdma res show cq dev hnseth0 -d
> >>>> dev hnseth5 cqe 1023 users 2 poll-ctx WORKQUEUE pid 0 comm [ib_core] state 2 ceq
> >>>> n 0 cqn 0 hopnum 1 pi 0 ci 0 maxcnt 0 period 0 cnt 0
> >>>
> >>> So what does it mean to see maxcnt? Why is it zero?
> >>
> >> "maxcnt" is the number of cqe aggregations. If it is 0, it means that cqe is not
> >> aggregated. This name has existed for a long time, and it really makes users
> >> confused. Perhaps "coalesce_num" or "coalesce" is a more appropriate name.
> > 
> > coalesce is certainyl better english what you described.. I would
> > never guess maxcnt has anything to do with aggregation.
> > 
> > Jason
> Hi Jason:
> 
> Thanks a lot for your reply.
> 
> Inappropriate naming is not friendly to user, I will pay more attention to the
> subsequent resources track in future.

The other thing that comes to mind here is how does the user know if a
string is a driver string or a core string? I don't like the idea that
the two namespaces would be conflated..

Steve? Did you do anything to prevent this in cxgb?

Jason



[Index of Archives]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Photo]     [Yosemite News]     [Yosemite Photos]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux