From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Matan Barak
<matanb-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>,
Or Gerlitz <ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Amir Vadai <amirv-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
Tal Alon <talal-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Subject: Re: [PATCH for-next V2 0/9] Add completion timestamping support
Date: Mon, 1 Jun 2015 10:43:22 -0600 [thread overview]
Message-ID: <20150601164322.GA14391@obsidianresearch.com> (raw)
In-Reply-To: <1433157904.114391.188.camel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
On Mon, Jun 01, 2015 at 07:25:04AM -0400, Doug Ledford wrote:
> attempted abstraction of ibverbs. Passing in the wc struct allows the
> driver to internally allocate a wc struct with extra private elements
> and pass that back to the user, when the user passes it back to
> ibv_get_timestamp the elements are there in the private portion of the
> struct.
wc structures are allocated by the caller, there is no option for the
driver to create private elements.
AFAIK, Christoph's use case is essentially the only meaningful use
case for this feature, generalizing too much may destroy the
performance that is valuable here.
Jason
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next prev parent reply other threads:[~2015-06-01 16:43 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-31 12:14 [PATCH for-next V2 0/9] Add completion timestamping support Or Gerlitz
[not found] ` <1433074457-26437-1-git-send-email-ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2015-05-31 12:14 ` [PATCH for-next V2 1/9] IB/core: Change provider's API of create_cq to be extendible Or Gerlitz
[not found] ` <1433074457-26437-2-git-send-email-ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2015-06-01 9:21 ` Devesh Sharma
2015-06-01 17:00 ` Jason Gunthorpe
2015-05-31 12:14 ` [PATCH for-next V2 2/9] IB/core: Change ib_create_cq to use struct ib_cq_init_attr Or Gerlitz
[not found] ` <1433074457-26437-3-git-send-email-ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2015-06-01 16:53 ` Jason Gunthorpe
[not found] ` <20150601165335.GB14391-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-06-02 7:29 ` Matan Barak
[not found] ` <CAAKD3BAyNpEKwM7xu=LzFo2F=qP=EN9ZteL2yyAgBVuPNmvtqA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-02 17:27 ` Jason Gunthorpe
[not found] ` <20150602172711.GB17776-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-06-03 9:04 ` Matan Barak
[not found] ` <CAAKD3BA7ZD4Gx5c16Ak+0_64rzazw+7n4frkuKHyrvdT=8ac6w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-03 16:02 ` Jason Gunthorpe
2015-05-31 12:14 ` [PATCH for-next V2 3/9] IB/core: Add CQ creation time-stamping flag Or Gerlitz
2015-05-31 12:14 ` [PATCH for-next V2 4/9] IB/core: Extend ib_uverbs_create_cq Or Gerlitz
2015-05-31 12:14 ` [PATCH for-next V2 5/9] IB/core: Add timestamp_mask and hca_core_clock to query_device Or Gerlitz
2015-05-31 12:14 ` [PATCH for-next V2 6/9] IB/core: Pass hardware specific data in query_device Or Gerlitz
[not found] ` <1433074457-26437-7-git-send-email-ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2015-06-01 9:24 ` Devesh Sharma
2015-05-31 12:14 ` [PATCH for-next V2 7/9] IB/mlx4: Add mmap call to map the hardware clock Or Gerlitz
2015-05-31 12:14 ` [PATCH for-next V2 8/9] IB/mlx4: Support extended create_cq and query_device uverbs Or Gerlitz
[not found] ` <1433074457-26437-9-git-send-email-ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2015-06-01 16:56 ` Jason Gunthorpe
[not found] ` <20150601165649.GC14391-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-06-02 7:21 ` Matan Barak
[not found] ` <CAAKD3BBsTFYKwOBK+6u04x6deRYzjYESJzbpyy83UtoChZhpOA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-02 17:07 ` Jason Gunthorpe
[not found] ` <20150602170736.GA17776-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-06-03 8:57 ` Matan Barak
[not found] ` <CAAKD3BARPocK1zZ2nYV0xWHqEASJTYbp1aQxwymi-TYTyK_vGA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-03 16:31 ` Jason Gunthorpe
[not found] ` <20150603163146.GD12073-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-06-03 18:58 ` Or Gerlitz
[not found] ` <CAJ3xEMhGdX-35WAjauKZE7+Wg39kbXP35UzYX33J6OB8g_9rYA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-03 19:16 ` Jason Gunthorpe
[not found] ` <20150603191609.GB7902-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-06-03 19:35 ` Or Gerlitz
[not found] ` <CAJ3xEMiPkxf_Qu40AozMRWZaY-dAfEyAOZGyT9VYsNpQO1Q-Zw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-03 20:38 ` Jason Gunthorpe
2015-05-31 12:14 ` [PATCH for-next V2 9/9] IB/mlx4: Add support for CQ time-stamping Or Gerlitz
2015-05-31 12:31 ` [PATCH for-next V2 0/9] Add completion timestamping support Or Gerlitz
2015-05-31 19:00 ` Doug Ledford
[not found] ` <1433098827.114391.179.camel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-06-01 9:30 ` Matan Barak
[not found] ` <CAAKD3BBo9A5AV9Uv-q1TgSQ6hs-oSUn5QsUT+5+6mk1RwW7AUA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-01 11:25 ` Doug Ledford
[not found] ` <1433157904.114391.188.camel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-06-01 13:58 ` Christoph Lameter
[not found] ` <alpine.DEB.2.11.1506010852360.26845-wcBtFHqTun5QOdAKl3ChDw@public.gmane.org>
2015-06-01 16:39 ` Doug Ledford
2015-06-01 16:43 ` Jason Gunthorpe [this message]
[not found] ` <20150601164322.GA14391-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-06-01 17:00 ` Doug Ledford
[not found] ` <1433178057.114391.208.camel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-06-01 17:29 ` Jason Gunthorpe
2015-06-02 14:35 ` Doug Ledford
[not found] ` <1433255724.114391.225.camel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-06-02 14:44 ` Or Gerlitz
[not found] ` <556DC167.5070205-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2015-06-02 14:53 ` Doug Ledford
2015-06-02 18:08 ` Jason Gunthorpe
[not found] ` <20150602180844.GD17776-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-06-02 18:51 ` Doug Ledford
[not found] ` <1433271083.40123.1.camel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-06-02 19:04 ` Jason Gunthorpe
[not found] ` <20150602190410.GA23362-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-06-02 19:56 ` Doug Ledford
2015-06-03 19:48 ` Or Gerlitz
[not found] ` <CAJ3xEMjZqwJC8=HrMBv_eSVKVtLW7qjVZNjtuD28octGPtYu6w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-06-03 20:46 ` Jason Gunthorpe
[not found] ` <20150603204633.GE7902-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-06-04 0:55 ` Christoph Lameter
[not found] ` <alpine.DEB.2.11.1506031953500.11879-wcBtFHqTun5QOdAKl3ChDw@public.gmane.org>
2015-06-04 4:25 ` Jason Gunthorpe
[not found] ` <20150604042540.GA8837-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-06-06 8:16 ` Christoph Lameter
[not found] ` <alpine.DEB.2.11.1506060304480.29634-wcBtFHqTun5QOdAKl3ChDw@public.gmane.org>
2015-06-06 15:45 ` Doug Ledford
[not found] ` <1433605546.40123.217.camel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-06-06 20:25 ` Or Gerlitz
2015-06-07 4:42 ` Jason Gunthorpe
2015-06-07 4:49 ` Christoph Lameter
2015-06-04 16:17 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373A8FE4F16-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-06-04 16:47 ` Jason Gunthorpe
[not found] ` <20150604164759.GC27699-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-06-04 17:24 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373A8FE4F98-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-06-06 8:27 ` Christoph Lameter
[not found] ` <alpine.DEB.2.11.1506060318570.29860-wcBtFHqTun5QOdAKl3ChDw@public.gmane.org>
2015-06-08 16:40 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373A8FE5AB8-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-06-10 1:26 ` Christoph Lameter
[not found] ` <alpine.DEB.2.11.1506092018190.6681-wcBtFHqTun5QOdAKl3ChDw@public.gmane.org>
2015-06-10 8:45 ` Or Gerlitz
[not found] ` <5577F93F.9030405-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2015-06-10 23:54 ` Doug Ledford
2015-06-10 16:04 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373A8FE6746-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2015-06-11 15:24 ` Christoph Lameter
[not found] ` <alpine.DEB.2.11.1506111010580.18426-wcBtFHqTun5QOdAKl3ChDw@public.gmane.org>
2015-06-11 19:48 ` Hefty, Sean
2015-06-04 17:30 ` Doug Ledford
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