Hi guys,

    I have downloaded the lastest seL4 repo and built the seL4 kernel.

    And I reuse the code in sel4test/projects/sel4test/apps/sel4test-tests/src/tests/ipc.c.

    To test the fast, I made minor modifications: first, set caller and callee to the same priority; second, caller uses seL4_Call while callee uses seL4_ReplyRecv.

     However, the fastpath takes more than 2000 cycles (a round trip).

     Build: use the lastest provided docker and ../init-build.sh -               DPLATFORM=x86_64 -DCMAKE_BUILD_TYPE=Release

     Both hardware and Qemu show similar results. (4.0GHz skylake CPU)


     BTW. The manifest is the same as https://sel4.systems/About/Performance/home.pml (i.e., bf13e9f673484825a60f9950cf688ff33ac841ad).

    Any advices about the issue?

Jinyu Gu,
Institute of Parallel and Distributed Systems (IPADS),
School of Software,
Shanghai Jiao Tong University