yanglimingcn opened a new pull request, #3328:
URL: https://github.com/apache/brpc/pull/3328
Add a new io_uring-based transport layer (IouringTransport) as an
alternative to the existing TCP and RDMA transports, following the same
architectural patterns as the RDMA implementation.
Core implementation:
- src/brpc/iouring/iouring_endpoint.h/cpp: IouringEndpoint (SocketUser
subclass) that submits async read/write SQEs and reaps CQEs, with optional
SQPOLL polling mode.
- src/brpc/iouring/iouring_helper.h/cpp: global io_uring ring lifecycle
management, per-bthread-tag poller threads, and availability checks.
- src/brpc/iouring_transport.h/cpp: IouringTransport (Transport interface)
wiring Init/Release/Reset/Connect/CutFromIOBuf(List)/
WaitEpollOut/ProcessEvent/QueueMessage/Debug/ContextInitOrDie.
Build system integration:
- CMakeLists.txt: BRPC_WITH_IOURING option; find_package(liburing);
conditionally compile iouring sources and link -luring.
- BUILD.bazel / bazel/config/BUILD.bazel: brpc_with_iouring config_setting;
conditional srcs/defines/linkopts/deps.
- WORKSPACE: new_local_repository for @com_github_axboe_liburing.
- bazel/third_party/liburing/liburing.BUILD: cc_library target for liburing.
Framework hooks:
- src/brpc/socket_mode.h: add SOCKET_MODE_IOURING enum value.
- src/brpc/transport_factory.cpp: register IouringTransport in
TransportFactory::Create().
- src/brpc/socket.h: friend declarations for IouringEndpoint /
IouringTransport.
- src/brpc/input_messenger.h: friend declarations for IouringEndpoint /
IouringTransport.
Bug fixes:
- src/butil/single_threaded_pool.h: rename static member BLOCK_SIZE to
POOL_BLOCK_SIZE to avoid conflict with the BLOCK_SIZE macro defined by
<linux/fs.h> (pulled in via liburing.h).
- src/brpc/iouring_transport.cpp: move DECLARE_bool(usercode_in_*) inside
namespace brpc{} to match the DEFINE_bool site in event_dispatcher.cpp, fixing
linker undefined-reference errors.
Example and documentation:
- example/iouring_performance/: server, client, proto, CMakeLists.txt
mirroring the rdma_performance example; supports WITH_IOURING=1 make flag.
- example/BUILD.bazel: Bazel targets for the new example.
- docs/cn/iouring.md: Chinese-language guide covering build, flags,
architecture and comparison with RDMA.
### What problem does this PR solve?
Issue Number: resolve
Problem Summary:
### What is changed and the side effects?
Changed:
Side effects:
- Performance effects:
- Breaking backward compatibility:
---
### Check List:
- Please make sure your changes are compilable.
- When providing us with a new feature, it is best to add related tests.
- Please follow [Contributor Covenant Code of
Conduct](https://github.com/apache/brpc/blob/master/CODE_OF_CONDUCT.md).
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