From: Tyler Retzlaff <roretzla@linux.microsoft.com>
To: dev@dpdk.org
Cc: Andrew Boyer <andrew.boyer@amd.com>,
Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>,
Bruce Richardson <bruce.richardson@intel.com>,
Chenbo Xia <chenbox@nvidia.com>,
Konstantin Ananyev <konstantin.v.ananyev@yandex.ru>,
Maxime Coquelin <maxime.coquelin@redhat.com>,
mb@smartsharesystems.com,
Tyler Retzlaff <roretzla@linux.microsoft.com>
Subject: [PATCH v2] RFC: replace GCC marker extension with C11 anonymous unions
Date: Mon, 12 Feb 2024 22:45:40 -0800 [thread overview]
Message-ID: <1707806741-29694-1-git-send-email-roretzla@linux.microsoft.com> (raw)
In-Reply-To: <1706657173-26166-2-git-send-email-roretzla@linux.microsoft.com>
The zero sized RTE_MARKER<n> typedefs are a GCC extension unsupported by
MSVC. Replace the use of the RTE_MARKER typedefs with anonymous unions.
Note:
v1 of the series tried to maintain the API after some study it has been
discovered that some existing uses of the markers do not produce compilation
failure but evaluate to unintended values in the absence of adaptation.
For this reason the existing markers cannot be removed because it is too hard
to identify what needs to be changed by consumers. While the ABI has been
maintained the subtle API change is just too risky.
The question I'm asking now is how to gracefully deprecate the markers
while allowing consumption of the struct on Windows.
I propose the following:
* Introduce the unions as per-this series except instead of adding members
that match the original RTE_MARKER field names provide *new* names.
* Retain (conditionally compiled away on Windows) the existing RTE_MARKER
fields with their original names.
* Convert in-tree code to use the new names in the unions.
The old names & markers would be announced for deprecation and eventually
removed and when they are the conditional compilation would also go away.
Thoughts?
v2:
* Introduce additional union/struct to agnostically pad cachline0 to
RTE_CACHE_LINE_MIN_SIZE without conditional compilation.
* Adapt ixgbe access of rearm_data field.
* Move ol_flags field out of rearm_data union where it didn't belong.
* Added a couple of static_asserts for offset of cacheline1 and
sizeof struct rte_mbuf.
Tyler Retzlaff (1):
mbuf: replace GCC marker extension with C11 anonymous unions
drivers/net/ionic/ionic_lif.c | 8 +-
drivers/net/ionic/ionic_rxtx_sg.c | 4 +-
drivers/net/ionic/ionic_rxtx_simple.c | 2 +-
drivers/net/ixgbe/ixgbe_rxtx_vec_sse.c | 8 +-
drivers/net/sfc/sfc_ef100_rx.c | 8 +-
drivers/net/sfc/sfc_ef10_rx.c | 12 +-
drivers/net/virtio/virtio_rxtx_packed_avx.h | 8 +-
lib/mbuf/rte_mbuf_core.h | 276 ++++++++++++++++------------
8 files changed, 179 insertions(+), 147 deletions(-)
--
1.8.3.1
next prev parent reply other threads:[~2024-02-13 6:45 UTC|newest]
Thread overview: 171+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-30 23:26 [PATCH] " Tyler Retzlaff
2024-01-30 23:26 ` [PATCH] mbuf: " Tyler Retzlaff
2024-01-31 9:18 ` Morten Brørup
2024-01-31 21:09 ` Tyler Retzlaff
2024-01-31 22:39 ` Morten Brørup
2024-01-31 13:49 ` Bruce Richardson
2024-01-31 20:45 ` Tyler Retzlaff
2024-01-31 22:55 ` Morten Brørup
2024-02-13 6:45 ` Tyler Retzlaff [this message]
2024-02-13 6:45 ` [PATCH v2] " Tyler Retzlaff
2024-02-13 16:58 ` Morten Brørup
2024-02-13 18:48 ` Tyler Retzlaff
2024-02-13 19:27 ` Morten Brørup
2024-02-13 20:00 ` Tyler Retzlaff
2024-02-13 8:57 ` [PATCH v2] RFC: " Bruce Richardson
2024-02-13 17:09 ` Morten Brørup
2024-02-13 23:33 ` [PATCH v3] RFC deprecate RTE_MARKER in struct rte_mbuf Tyler Retzlaff
2024-02-13 23:33 ` [PATCH v3] mbuf: deprecate GCC marker in rte mbuf struct Tyler Retzlaff
2024-02-14 10:46 ` Morten Brørup
2024-02-14 20:16 ` Tyler Retzlaff
2024-02-14 10:49 ` [PATCH v3] RFC deprecate RTE_MARKER in struct rte_mbuf Morten Brørup
2024-02-26 1:18 ` Stephen Hemminger
2024-02-15 6:21 ` [PATCH v4 00/18] stop using zero sized marker fields Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 01/18] mbuf: deprecate GCC marker in rte mbuf struct Tyler Retzlaff
2024-02-18 2:28 ` fengchengwen
2024-02-18 12:39 ` Thomas Monjalon
2024-02-18 13:07 ` Morten Brørup
2024-02-18 15:22 ` Thomas Monjalon
2024-02-18 16:20 ` Morten Brørup
2024-02-20 17:24 ` Tyler Retzlaff
2024-02-20 17:20 ` Tyler Retzlaff
2024-02-20 17:53 ` Thomas Monjalon
2024-02-20 19:16 ` Thomas Monjalon
2024-02-20 19:37 ` Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 02/18] mbuf: stop using zero sized marker fields Tyler Retzlaff
2024-02-18 2:38 ` fengchengwen
2024-02-15 6:21 ` [PATCH v4 03/18] net/i40e: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 04/18] net/iavf: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 05/18] net/ice: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 06/18] net/ixgbe: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 07/18] net/mlx5: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 08/18] net/sfc: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 09/18] net/bnxt: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 10/18] net/enic: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 11/18] net/fm10k: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 12/18] net/hns3: " Tyler Retzlaff
2024-02-18 3:00 ` fengchengwen
2024-02-15 6:21 ` [PATCH v4 13/18] net/ionic: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 14/18] net/thunderx: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 15/18] net/virtio: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 16/18] net/cnxk: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 17/18] common/idpf: " Tyler Retzlaff
2024-02-15 6:21 ` [PATCH v4 18/18] examples/dma: " Tyler Retzlaff
2024-02-15 9:37 ` [PATCH v4 00/18] " Morten Brørup
2024-02-24 8:21 ` [PATCH v5 00/22] stop using RTE_MARKER extensions Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 01/22] eal: provide macro to expand marker extensions Tyler Retzlaff
2024-02-24 10:51 ` Thomas Monjalon
2024-02-24 11:18 ` Thomas Monjalon
2024-02-24 8:21 ` [PATCH v5 02/22] mbuf: expand rte markers empty when building with MSVC Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 03/22] security: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 04/22] cryptodev: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 05/22] mbuf: stop using mbuf cacheline marker fields Tyler Retzlaff
2024-02-24 10:58 ` Thomas Monjalon
2024-02-26 18:20 ` Stephen Hemminger
2024-02-24 8:21 ` [PATCH v5 06/22] mbuf: add mbuf descriptor accessors Tyler Retzlaff
2024-02-24 11:01 ` Thomas Monjalon
2024-02-24 8:21 ` [PATCH v5 07/22] common/idpf: use " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 08/22] net/bnxt: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 09/22] net/cnxk: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 10/22] net/enic: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 11/22] net/fm10k: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 12/22] net/hns3: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 13/22] net/i40e: " Tyler Retzlaff
2024-02-24 8:21 ` [PATCH v5 14/22] net/iavf: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 15/22] net/ice: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 16/22] net/ionic: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 17/22] net/ixgbe: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 18/22] net/mlx5: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 19/22] net/octeon_ep: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 20/22] net/sfc: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 21/22] net/thunderx: " Tyler Retzlaff
2024-02-24 8:22 ` [PATCH v5 22/22] net/virtio: " Tyler Retzlaff
2024-02-24 10:42 ` [PATCH v5 00/22] stop using RTE_MARKER extensions Morten Brørup
2024-02-24 11:13 ` Thomas Monjalon
2024-02-24 11:23 ` Morten Brørup
2024-02-27 5:41 ` [PATCH v6 00/23] stop and remove RTE_MARKER typedefs Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 01/23] mbuf: add accessors for rearm and Rx descriptor fields Tyler Retzlaff
2024-02-27 9:10 ` Morten Brørup
2024-02-27 17:17 ` Tyler Retzlaff
2024-02-28 8:28 ` Morten Brørup
2024-02-28 16:20 ` Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 02/23] mbuf: consolidate driver asserts for mbuf struct Tyler Retzlaff
2024-02-27 10:02 ` Konstantin Ananyev
2024-03-14 16:51 ` Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 03/23] common/idpf: use mbuf descriptor accessors Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 04/23] net/bnxt: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 05/23] net/cnxk: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 06/23] net/enic: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 07/23] net/fm10k: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 08/23] net/hns3: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 09/23] net/i40e: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 10/23] net/iavf: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 11/23] net/ice: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 12/23] net/ionic: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 13/23] net/ixgbe: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 14/23] net/mlx5: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 15/23] net/octeon_ep: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 16/23] net/sfc: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 17/23] net/thunderx: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 18/23] net/virtio: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 19/23] examples/dma: use mbuf descriptor accessor Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 20/23] mbuf: remove and stop using rte marker fields Tyler Retzlaff
2024-02-27 9:15 ` Morten Brørup
2024-02-27 10:03 ` Konstantin Ananyev
2024-02-27 15:18 ` David Marchand
2024-02-27 16:04 ` Morten Brørup
2024-02-27 17:23 ` Tyler Retzlaff
2024-02-28 10:42 ` David Marchand
2024-02-28 14:03 ` Dodji Seketeli
2024-02-28 14:43 ` David Marchand
2024-02-29 14:50 ` Dodji Seketeli
2024-02-28 14:18 ` David Marchand
2024-02-28 15:01 ` Morten Brørup
2024-02-28 15:33 ` David Marchand
2024-02-28 17:20 ` Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 21/23] security: remove " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 22/23] cryptodev: " Tyler Retzlaff
2024-02-27 5:41 ` [PATCH v6 23/23] devtools: forbid new use of rte marker typedefs Tyler Retzlaff
2024-03-20 22:01 ` [PATCH v7 0/4] remove use of RTE_MARKER fields in libraries Tyler Retzlaff
2024-03-20 22:01 ` [PATCH v7 1/4] net/i40e: use inline prefetch function Tyler Retzlaff
2024-03-26 10:16 ` Morten Brørup
2024-03-27 18:14 ` Tyler Retzlaff
2024-03-27 19:45 ` Morten Brørup
2024-03-20 22:01 ` [PATCH v7 2/4] mbuf: remove rte marker fields Tyler Retzlaff
2024-03-21 10:32 ` Bruce Richardson
2024-03-21 15:31 ` Tyler Retzlaff
2024-03-21 16:19 ` Morten Brørup
2024-03-26 11:12 ` Morten Brørup
2024-03-20 22:01 ` [PATCH v7 3/4] security: " Tyler Retzlaff
2024-03-26 10:28 ` Morten Brørup
2024-03-27 19:59 ` Tyler Retzlaff
2024-03-20 22:01 ` [PATCH v7 4/4] cryptodev: " Tyler Retzlaff
2024-03-26 10:31 ` Morten Brørup
2024-03-27 19:56 ` [PATCH v8 0/4] remove use of RTE_MARKER fields in libraries Tyler Retzlaff
2024-03-27 19:56 ` [PATCH v8 1/4] net/i40e: use inline prefetch function Tyler Retzlaff
2024-03-27 19:56 ` [PATCH v8 2/4] mbuf: remove rte marker fields Tyler Retzlaff
2024-03-27 19:56 ` [PATCH v8 3/4] security: " Tyler Retzlaff
2024-03-27 19:56 ` [PATCH v8 4/4] cryptodev: " Tyler Retzlaff
2024-04-02 20:08 ` [PATCH v9 0/4] remove use of RTE_MARKER fields in libraries Tyler Retzlaff
2024-04-02 20:08 ` [PATCH v9 1/4] net/i40e: use inline prefetch function Tyler Retzlaff
2024-04-02 20:08 ` [PATCH v9 2/4] mbuf: remove rte marker fields Tyler Retzlaff
2024-04-02 20:45 ` Stephen Hemminger
2024-04-02 20:51 ` Tyler Retzlaff
2024-04-02 20:08 ` [PATCH v9 3/4] security: " Tyler Retzlaff
2024-04-02 20:08 ` [PATCH v9 4/4] cryptodev: " Tyler Retzlaff
2024-04-03 17:53 ` [PATCH v10 0/4] remove use of RTE_MARKER fields in libraries Tyler Retzlaff
2024-04-03 17:53 ` [PATCH v10 1/4] net/i40e: use inline prefetch function Tyler Retzlaff
2024-04-03 21:49 ` Stephen Hemminger
2024-04-03 17:53 ` [PATCH v10 2/4] mbuf: remove rte marker fields Tyler Retzlaff
2024-04-03 19:32 ` Morten Brørup
2024-04-03 22:45 ` Tyler Retzlaff
2024-04-03 21:49 ` Stephen Hemminger
2024-04-03 17:53 ` [PATCH v10 3/4] security: " Tyler Retzlaff
2024-04-03 21:50 ` Stephen Hemminger
2024-04-03 17:53 ` [PATCH v10 4/4] cryptodev: " Tyler Retzlaff
2024-04-03 21:50 ` Stephen Hemminger
2024-04-04 17:51 ` [PATCH v11 0/4] remove use of RTE_MARKER fields in libraries Tyler Retzlaff
2024-04-04 17:51 ` [PATCH v11 1/4] net/i40e: use inline prefetch function Tyler Retzlaff
2024-04-04 17:51 ` [PATCH v11 2/4] mbuf: remove rte marker fields Tyler Retzlaff
2024-04-04 17:51 ` [PATCH v11 3/4] security: " Tyler Retzlaff
2024-04-04 17:51 ` [PATCH v11 4/4] cryptodev: " Tyler Retzlaff
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