This project adds Homa support to gRPC, so that gRPC applications can use Homa instead of TCP for transport.
This project is no longer under active development. At the time development was suspended (late 2023) C++ support was functional and Java support was partially implemented. I can't promise support for the existing code, but if you wish to continue development of this I may be able to provide some advice.
The head is currently based on gRPC v. 1.57.0 (and there is a branch named grpc-1.57.0 that will track this version of gRPC). There are also branches grpc-1.43.0 and grpc-1.41.0, which represent the most recent code to work on those branches. Older branches are not actively maintained.
Known limitations:
Initial performance measurements show that short RPCs complete about 40% faster with Homa than with TCP (about 55 us round trip for Homa, vs. 90 us for TCP).
You will need to download the Linux kernel driver for Homa. Compile it as described in that repo and install it on all the machines where you plan to use gRPC.
Configure the Makefile as described in the comments at the top (sorry... I know this shouldn't need to be done manually).
Type make
. This will build libhoma.a
, which you should link with your applications.
When compiling your applications, use -I
to specify this directory, then #include homa_client.h
as needed for clients and #include homa_listener.h
as needed for servers.
On clients, pass HomaClient::insecureChannelCredentials()
to grpc::CreateChannel
instead of grpc::InsecureChannelCredentials()
to create a channel that uses Homa. For an example of a simple but complete client, see test_client.cc
.
On servers, pass HomaListener::insecureCredentials()
to grpc::AddListeningPort
instead of grpc::InsecureServerCredentials()
. For an example of a simple but complete server, see test_server.cc
.
Once you have done this, all your existing gRPC-based code should work just fine.
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