From: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: Gavin Hu <Gavin.Hu@arm.com>, Joyce Kong <Joyce.Kong@arm.com>,
"thomas@monjalon.net" <thomas@monjalon.net>,
"david.marchand@redhat.com" <david.marchand@redhat.com>,
"mb@smartsharesystems.com" <mb@smartsharesystems.com>,
"jerinj@marvell.com" <jerinj@marvell.com>,
"bruce.richardson@intel.com" <bruce.richardson@intel.com>,
"ravi1.kumar@amd.com" <ravi1.kumar@amd.com>,
"rmody@marvell.com" <rmody@marvell.com>,
"shshaikh@marvell.com" <shshaikh@marvell.com>,
"xuanziyang2@huawei.com" <xuanziyang2@huawei.com>,
"cloud.wangxiaoyun@huawei.com" <cloud.wangxiaoyun@huawei.com>,
"zhouguoyang@huawei.com" <zhouguoyang@huawei.com>,
Phil Yang <Phil.Yang@arm.com>, nd <nd@arm.com>,
"dev@dpdk.org" <dev@dpdk.org>,
Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
nd <nd@arm.com>
Subject: Re: [dpdk-dev] [PATCH v6 1/6] lib/eal: implement the family of rte bit operation APIs
Date: Tue, 7 Jan 2020 04:41:06 +0000 [thread overview]
Message-ID: <VE1PR08MB514950584CEF3CB5025FBBB2983F0@VE1PR08MB5149.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <20200106172601.71750b85@hermes.lan>
<snip>
> >
> > > > >
> > > > > >
> > > > > > On Sat, 21 Dec 2019 16:07:23 +0000 Honnappa Nagarahalli
> > > > > > <Honnappa.Nagarahalli@arm.com> wrote:
> > > > > >
> > > > > > > Converting these into macros will help remove the size based
> > > > > > > duplication
> > > > of
> > > > > > APIs. I came up with the following macro:
> > > > > > >
> > > > > > > #define RTE_GET_BIT(nr, var, ret, memorder) \ ({ \
> > > > > > > if (sizeof(var) == sizeof(uint32_t)) { \
> > > > > > > uint32_t mask1 = 1U << (nr)%32; \
> > > > > > > ret = __atomic_load_n(&var, (memorder)) & mask1;\
> > > > > > > } \
> > > > > > > else {\
> > > > > > > uint64_t mask2 = 1UL << (nr)%64;\
> > > > > > > ret = __atomic_load_n(&var, (memorder)) & mask2;\
> > > > > > > } \
> > > > > > > })
> > > > > >
> > > > > > Macros are more error prone. Especially because this is in
> > > > > > exposed header
> > > > file
> > > > > That's another question I have. Why do we need to have these
> > > > > APIs in a
> > > > public header file? These will add to the ABI burden as well.
> > > > These APIs should be in a common-but-not-public header file. I am
> > > > also not sure how helpful these APIs are for applications as these
> > > > APIs seem to have considered requirements only from the PMDs.
> > > >
> > > > Why do we have to wrap every C atomic builtin? What value is there in
> that?
> > >
> > > The wrapping is aimed to reduce code duplication, on average 3 lines
> > > cut down to 1 line for a single core.
> > > Overall I am thinking this bitops APIs are targeted for use by PMDs
> > > only, applications can use C11 freely.
> > > The initial thought for the new APIs came from the idea of
> > > consolidating the scattered bit operations all over the PMDs. It is
> > > unwise to expanding to applications or libraries, as different
> > > memory orderings are required and complexity generate.
> > >
> > > If the use cases are limited to PMDs, a 'volatile' or a compiler
> > > barrier is sufficient therefore the number of APIs can be saved by half.
> > >
> http://inbox.dpdk.org/dev/VI1PR08MB53766C30B5CDA00FB9FCE9678F2E0
> > > @VI1PR08MB5376.eurprd08.prod.outlook.com/
> > >
> > > Any thoughts and comments are welcome!
> > I would prefer that the APIs/Macros just address PMD's requirements.
> These also should be kept private (through naming conventions?). Given that
> the current PMDs are not using C11, we can skip using C11 atomics in these
> APIs.
>
> Not in favor, just use existing Gcc/clang/icc atomics instead of creating
> unnecessary bloat wrappers.
I thought, you blessed this patch [1].
[1] http://mails.dpdk.org/archives/dev/2019-October/147297.html
next prev parent reply other threads:[~2020-01-07 4:41 UTC|newest]
Thread overview: 141+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-15 7:49 [dpdk-dev] [PATCH v1 0/5] implement common rte bit operation APIs in PMDs Joyce Kong
2019-10-15 7:49 ` [dpdk-dev] [PATCH v1 1/5] lib/eal: implement the family of rte bit operation APIs Joyce Kong
2019-10-15 16:53 ` Stephen Hemminger
2019-10-18 9:00 ` Joyce Kong (Arm Technology China)
2019-10-16 7:54 ` Jerin Jacob
2019-10-18 9:02 ` Joyce Kong (Arm Technology China)
2019-10-23 3:12 ` Joyce Kong (Arm Technology China)
2019-10-16 19:05 ` Stephen Hemminger
2019-10-17 13:32 ` [dpdk-dev] [PATCH v1 1/5] lib/eal: implement the family of rte bitoperation APIs Morten Brørup
2019-10-18 8:58 ` Joyce Kong (Arm Technology China)
2019-10-23 3:07 ` Joyce Kong (Arm Technology China)
2019-10-23 7:45 ` Morten Brørup
2019-10-23 17:30 ` Honnappa Nagarahalli
2019-10-24 3:38 ` Gavin Hu (Arm Technology China)
2019-11-01 13:48 ` Honnappa Nagarahalli
2019-11-03 15:45 ` Gavin Hu (Arm Technology China)
2019-10-15 7:49 ` [dpdk-dev] [PATCH v1 2/5] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2019-10-15 7:49 ` [dpdk-dev] [PATCH v1 3/5] net/bnx2x: " Joyce Kong
2019-10-15 7:50 ` [dpdk-dev] [PATCH v1 4/5] net/hinic: " Joyce Kong
2019-10-15 7:50 ` [dpdk-dev] [PATCH v1 5/5] net/qede: " Joyce Kong
2019-10-15 16:51 ` [dpdk-dev] [PATCH v1 0/5] implement common rte bit operation APIs in PMDs Stephen Hemminger
2019-10-18 9:01 ` Joyce Kong (Arm Technology China)
2019-10-23 2:54 ` [dpdk-dev] [PATCH v2 0/6] " Joyce Kong
2019-10-25 13:14 ` David Marchand
2019-10-29 16:42 ` Thomas Monjalon
2019-10-30 9:55 ` Gavin Hu (Arm Technology China)
2019-10-30 10:17 ` Thomas Monjalon
2019-10-30 12:32 ` Jerin Jacob
2019-10-30 13:02 ` Morten Brørup
2019-10-31 10:39 ` Gavin Hu (Arm Technology China)
2019-10-23 2:54 ` [dpdk-dev] [PATCH v2 1/6] lib/eal: implement the family of rte bit operation APIs Joyce Kong
2019-10-23 3:09 ` Honnappa Nagarahalli
2019-10-23 4:56 ` Jerin Jacob
2019-10-23 7:46 ` Morten Brørup
2019-10-23 2:54 ` [dpdk-dev] [PATCH v2 2/6] test/iobitops: add io bit operation test case Joyce Kong
2019-10-23 2:54 ` [dpdk-dev] [PATCH v2 3/6] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2019-10-23 3:16 ` Honnappa Nagarahalli
2019-10-23 2:54 ` [dpdk-dev] [PATCH v2 4/6] net/bnx2x: " Joyce Kong
2019-10-23 2:54 ` [dpdk-dev] [PATCH v2 5/6] net/hinic: " Joyce Kong
2019-10-23 2:54 ` [dpdk-dev] [PATCH v2 6/6] net/qede: " Joyce Kong
2019-11-18 10:06 ` [dpdk-dev] [PATCH v3 0/6] implement common rte bit operation APIs in PMDs Joyce Kong
2019-11-18 10:06 ` [dpdk-dev] [PATCH v3 1/6] lib/eal: implement the family of rte bit operation APIs Joyce Kong
2019-11-18 10:52 ` [dpdk-dev] [PATCH v3 1/6] lib/eal: implement the family of rte bitoperation APIs Morten Brørup
2019-11-19 9:22 ` Joyce Kong (Arm Technology China)
2019-11-18 10:06 ` [dpdk-dev] [PATCH v3 2/6] test/bitops: add bit operation test case Joyce Kong
2019-11-18 10:06 ` [dpdk-dev] [PATCH v3 3/6] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2019-11-18 10:06 ` [dpdk-dev] [PATCH v3 4/6] net/bnx2x: " Joyce Kong
2019-11-18 10:06 ` [dpdk-dev] [PATCH v3 5/6] net/qede: " Joyce Kong
2019-11-18 10:06 ` [dpdk-dev] [PATCH v3 6/6] net/hinic: " Joyce Kong
2019-11-20 10:12 ` [dpdk-dev] [PATCH v4 0/6] implement common rte bit operation APIs in PMDs Joyce Kong
2019-11-20 10:12 ` [dpdk-dev] [PATCH v4 1/6] lib/eal: implement the family of rte bit operation APIs Joyce Kong
2019-11-20 13:40 ` [dpdk-dev] [PATCH v4 1/6] lib/eal: implement the family of rte bitoperation APIs Morten Brørup
2019-11-20 10:12 ` [dpdk-dev] [PATCH v4 2/6] test/bitops: add bit operation test case Joyce Kong
2019-11-20 10:12 ` [dpdk-dev] [PATCH v4 3/6] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2019-11-20 10:12 ` [dpdk-dev] [PATCH v4 4/6] net/bnx2x: " Joyce Kong
2019-11-20 10:12 ` [dpdk-dev] [PATCH v4 5/6] net/qede: " Joyce Kong
2019-11-20 10:12 ` [dpdk-dev] [PATCH v4 6/6] net/hinic: " Joyce Kong
2019-11-28 6:44 ` [dpdk-dev] [PATCH v5 0/6] implement common rte bit operation APIs in PMDs Joyce Kong
2019-11-28 6:44 ` [dpdk-dev] [PATCH v5 1/6] lib/eal: implement the family of rte bit operation APIs Joyce Kong
2019-11-28 6:44 ` [dpdk-dev] [PATCH v5 2/6] test/bitops: add bit operation test case Joyce Kong
2019-11-28 6:44 ` [dpdk-dev] [PATCH v5 3/6] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2019-12-02 6:09 ` Gavin Hu (Arm Technology China)
2019-12-02 9:12 ` Thomas Monjalon
2019-12-02 9:24 ` [dpdk-dev] [PATCH v5 3/6] net/axgbe: use common rte bitoperation " Morten Brørup
2019-12-02 9:30 ` Thomas Monjalon
2019-12-02 16:53 ` Stephen Hemminger
2019-12-03 6:52 ` Gavin Hu (Arm Technology China)
2019-11-28 6:44 ` [dpdk-dev] [PATCH v5 4/6] net/bnx2x: use common rte bit operation " Joyce Kong
2019-11-28 6:44 ` [dpdk-dev] [PATCH v5 5/6] net/qede: " Joyce Kong
2019-11-28 6:44 ` [dpdk-dev] [PATCH v5 6/6] net/hinic: " Joyce Kong
2019-12-18 6:00 ` [dpdk-dev] [PATCH v6 0/6] implement common rte bit operation APIs in PMDs Joyce Kong
2019-12-18 6:55 ` Gavin Hu
2020-01-17 13:03 ` David Marchand
2019-12-18 6:00 ` [dpdk-dev] [PATCH v6 1/6] lib/eal: implement the family of rte bit operation APIs Joyce Kong
2019-12-20 6:52 ` Honnappa Nagarahalli
2019-12-21 16:07 ` Honnappa Nagarahalli
2019-12-21 18:07 ` Stephen Hemminger
2019-12-23 5:04 ` Honnappa Nagarahalli
2019-12-23 16:36 ` Stephen Hemminger
2019-12-30 3:02 ` Gavin Hu
2020-01-07 0:44 ` Honnappa Nagarahalli
2020-01-07 1:26 ` Stephen Hemminger
2020-01-07 4:41 ` Honnappa Nagarahalli [this message]
2020-01-07 0:41 ` Honnappa Nagarahalli
2019-12-21 18:08 ` Stephen Hemminger
2019-12-23 5:45 ` Honnappa Nagarahalli
2019-12-23 8:59 ` Jerin Jacob
2019-12-18 6:00 ` [dpdk-dev] [PATCH v6 2/6] test/bitops: add bit operation test case Joyce Kong
2019-12-18 6:00 ` [dpdk-dev] [PATCH v6 3/6] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2019-12-18 6:00 ` [dpdk-dev] [PATCH v6 4/6] net/bnx2x: " Joyce Kong
2019-12-18 6:00 ` [dpdk-dev] [PATCH v6 5/6] net/qede: " Joyce Kong
2019-12-18 6:00 ` [dpdk-dev] [PATCH v6 6/6] net/hinic: " Joyce Kong
2020-03-09 9:54 ` [dpdk-dev] [PATCH v7 0/6] implement common rte bit operation APIs in PMDs Joyce Kong
2020-03-09 9:54 ` [dpdk-dev] [PATCH v7 1/6] lib/eal: implement the family of PMD bit operation APIs Joyce Kong
2020-03-09 15:50 ` Stephen Hemminger
2020-03-31 22:35 ` Thomas Monjalon
2020-04-01 8:27 ` Gavin Hu
2020-04-01 9:45 ` Thomas Monjalon
2020-04-02 7:20 ` Gavin Hu
2020-04-02 8:07 ` Thomas Monjalon
2020-04-02 8:11 ` Jerin Jacob
2020-04-02 9:02 ` Gavin Hu
2020-03-09 9:54 ` [dpdk-dev] [PATCH v7 2/6] test/pmdbitops: add PMD bit operation test case Joyce Kong
2020-03-09 9:54 ` [dpdk-dev] [PATCH v7 3/6] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2020-03-09 9:54 ` [dpdk-dev] [PATCH v7 4/6] net/bnx2x: " Joyce Kong
2020-03-09 9:54 ` [dpdk-dev] [PATCH v7 5/6] net/qede: " Joyce Kong
2020-03-09 9:54 ` [dpdk-dev] [PATCH v7 6/6] net/hinic: " Joyce Kong
2020-04-16 5:38 ` [dpdk-dev] [PATCH v8 0/6] implement common bit operation APIs Joyce Kong
2020-04-16 5:38 ` [dpdk-dev] [PATCH v8 1/6] lib/eal: implement the family of " Joyce Kong
2020-04-16 18:55 ` [dpdk-dev] [PATCH v8 1/6] lib/eal: implement the family of commonbit " Morten Brørup
2020-04-17 8:18 ` Joyce Kong
2020-04-17 9:38 ` [dpdk-dev] [PATCH v8 1/6] lib/eal: implement the family of common bit " Jerin Jacob
2020-04-20 2:46 ` Joyce Kong
2020-04-16 5:38 ` [dpdk-dev] [PATCH v8 2/6] test/bitops: add bit operation test case Joyce Kong
2020-04-16 5:38 ` [dpdk-dev] [PATCH v8 3/6] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2020-04-16 5:38 ` [dpdk-dev] [PATCH v8 4/6] net/bnx2x: " Joyce Kong
2020-04-16 5:38 ` [dpdk-dev] [PATCH v8 5/6] net/qede: " Joyce Kong
2020-04-16 5:38 ` [dpdk-dev] [PATCH v8 6/6] net/hinic: " Joyce Kong
2020-04-24 3:21 ` [dpdk-dev] [PATCH v9 0/6] implement common bit operation APIs Joyce Kong
2020-04-24 3:21 ` [dpdk-dev] [PATCH v9 1/6] lib/eal: implement the family of " Joyce Kong
2020-04-24 8:08 ` Thomas Monjalon
2020-04-26 2:07 ` Joyce Kong
2020-04-25 19:59 ` Thomas Monjalon
2020-04-26 7:18 ` Joyce Kong
2020-04-26 9:23 ` Thomas Monjalon
2020-04-24 3:21 ` [dpdk-dev] [PATCH v9 2/6] test/bitops: add bit operation test case Joyce Kong
2020-04-24 3:21 ` [dpdk-dev] [PATCH v9 3/6] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2020-04-24 3:21 ` [dpdk-dev] [PATCH v9 4/6] net/bnx2x: " Joyce Kong
2020-04-24 3:21 ` [dpdk-dev] [PATCH v9 5/6] net/qede: " Joyce Kong
2020-04-24 3:21 ` [dpdk-dev] [PATCH v9 6/6] net/hinic: " Joyce Kong
2020-04-27 7:58 ` [dpdk-dev] [PATCH v10 0/6] implement common bit operation APIs Joyce Kong
2020-06-16 12:36 ` Thomas Monjalon
2020-04-27 7:58 ` [dpdk-dev] [PATCH v10 1/6] lib/eal: implement the family of " Joyce Kong
2020-04-27 7:58 ` [dpdk-dev] [PATCH v10 2/6] test/bitops: add bit operation test case Joyce Kong
2020-04-27 7:58 ` [dpdk-dev] [PATCH v10 3/6] net/axgbe: use common rte bit operation APIs instead Joyce Kong
2020-04-27 7:58 ` [dpdk-dev] [PATCH v10 4/6] net/bnx2x: " Joyce Kong
2024-02-17 12:01 ` Mattias Rönnblom
2024-02-17 14:25 ` Thomas Monjalon
2020-04-27 7:58 ` [dpdk-dev] [PATCH v10 5/6] net/qede: " Joyce Kong
2020-04-27 7:58 ` [dpdk-dev] [PATCH v10 6/6] net/hinic: " Joyce Kong
2020-06-16 12:31 ` Thomas Monjalon
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=VE1PR08MB514950584CEF3CB5025FBBB2983F0@VE1PR08MB5149.eurprd08.prod.outlook.com \
--to=honnappa.nagarahalli@arm.com \
--cc=Gavin.Hu@arm.com \
--cc=Joyce.Kong@arm.com \
--cc=Phil.Yang@arm.com \
--cc=bruce.richardson@intel.com \
--cc=cloud.wangxiaoyun@huawei.com \
--cc=david.marchand@redhat.com \
--cc=dev@dpdk.org \
--cc=jerinj@marvell.com \
--cc=mb@smartsharesystems.com \
--cc=nd@arm.com \
--cc=ravi1.kumar@amd.com \
--cc=rmody@marvell.com \
--cc=shshaikh@marvell.com \
--cc=stephen@networkplumber.org \
--cc=thomas@monjalon.net \
--cc=xuanziyang2@huawei.com \
--cc=zhouguoyang@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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).