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diff --git a/stacks/rsocket/doc/README.md b/stacks/rsocket/doc/README.md new file mode 100644 index 0000000..237db68 --- /dev/null +++ b/stacks/rsocket/doc/README.md @@ -0,0 +1,110 @@ +# 1. What is rsocket +Rsockets is a protocol over RDMA that supports a socket-level API for +applications. +The dmm_rsocket adapted to DMM based on the librdmacm 1.1.0 version make it a +protocol in DMM framework. + +# 2. How to use DMM-rsocket + +## How to integrate rsocket into DMM + +The file CMakeList.txt defined the compiling process, including downloading +librdmacm 1.1.0 and patch it with rsocket.patch. The patch will +modify the related files when necessary, and finally provide +library of "libdmm_rdmacm.a" and "libdmm_rsocket.so". + +Target 'dmm_rsocket' could not be get automatically unless you run 'make dmm_rsocket' manually. +'make dmm_rsocket' will compile the adaption code and linking with libdmm_rdmacm.a. + + + +## Compile +(refer to dmm/doc/Build_DMM.md) +```sh + #cd dmm/build && cmake .. + #make help + #make dmm_rsocket +``` +Note: + After these processes, libdmm_rsocket.so protocol module would be created in +dmm/release/lib64/libdmm_rsocket.so + +## Test +- Steps 1: update some environment variables +```sh + #export LD_LIBRARY_PATH=${dmm}/release/lib64 + #export LD_PRELOAD=${dmm}/release/lib64/libnStackAPI.so + #export NSTACK_MOD_CFG_FILE=${dmm}/stacks/rsocket/config/module_config.json + #export NSTACK_MOD_CFG_RD=${dmm}/stacks/rsocket/config/rd_config.json +``` +- Steps 2: Modify rd_config.json(located at dmm/stacks/rsocket/config/) +```sh + #vim rd_config.json + //set "subnet": "192.168.21.1/24" +``` +Note: + Means dmm will hijack data from subnet 192.168.21.* + +- Steps 3: Communication test between machine A(as server) with machine B + (as client) + +##### Run in machine A +```sh + #./dmm/release/bin/vs_epoll -p 20000 -d 192.168.21.180 -a 10000 -s 192.168.21.181 -l 1000 -t 500000 -i 0 -f 1 -r 20000 -n 1 -w 10 -u 50000 -e 10 -x 1 +``` +Note: + Means the current machine would be server, and it's +destination address is 192.168.21.180 (client address), +source address is 192.168.21.181(server address) + +##### Run in machine B +``` + #./dmm/release/bin/vc_common -p 20000 -d 192.168.21.181 -a 10000 -s 192.168.21.180 -l 1000 -t 500000 -i 0 -f 1 -r 20000 -n 1 -w 10 -u 50000 -e 10 -x 1 +``` +Note: + Means the current machine would be client, and it's +destination address is 192.168.21.181 (server address), +source address is 192.168.21.180(client address) + +# 3. Document description + +(dmm/stacks/rsocket) + +## CMakeLists.txt +Control file for Cmake compiling. + +## config folder +##### module_config.json +- module_config.json is for configuring dmm protocol stack module + +##### rd_config.json +- rd_config.json is to choose which module is better to go through. It will go + through rsocket protocol stack when RD type is nstack-rsocket + +## rsocket.patch +For the librdmacm patch, the key modification is to find the point where the +epoll event is executed, all using the DMM_RSOCKET macro control. +Other changes are to package the hijacked API, so that the code can calls +libc API directly to avoid calls to the hijacked functions in the DMM, +all using GSAPI macro control. + +## src folder +##### rsocket_adpt.c && rsocket_adpt.h +- Rsocket adaptation section, including initialization and adaptation functions. + +##### rsocket_rdma.h +- Public header file. + +##### rsocket_in.h && rsocket_rs.c +- rsocket_in.h is included in rsocket.c.(rsocket.c is located at + dmm/stacks/rsocket/librdmacm-1.1.0/src) +- rsocket_rs.c is embedded at the end of rsocket.c + +##### rsocket_sapi.h +- List of libc functions which only be used internally. + +# 4. More Information +https://wiki.fd.io/view/DMM +https://github.com/ofiwg/librdmacm/blob/master/docs/rsocket +https://github.com/rsocket/rsocket +http://www.mellanox.com/page/products_dyn?product_family=26
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