3rd-party/linux-kernel-module-cheat
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gem5 build getting slower as usual

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Ciro Santilli 六四事件 法轮功
2020-05-12 01:00:00 +00:00
parent 6275f70ed8
commit a41f924706
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@@ -23498,6 +23498,8 @@ tail -n+1 ../linux-kernel-module-cheat-regression/*/gem5-bench-build-*.txt
Ubuntu 19.10, GCC 9.2.1, LKMC 7c6bb29bc89ec3f1056c0680c3f08bd64018a7bc, gem5 d7d9bc240615625141cd6feddbadd392457e49eb (2020-02-18), `./build --arch aarch64 --gem5-worktree master --no-cache`: 19m 33s TODO must investigate why it got so much worse.
Ubuntu 20.04, GCC 9.3.0, LKMC 6275f70ed8862d8fe4e58ca4524a6994d254be35, gem5 d9cb548d83fa81858599807f54b52e5be35a6b03 (2020-05-06), `./build --arch aarch64 --gem5-worktree master --no-cache`: 28m!!! It's out of control.
Same but gem5 d7d9bc240615625141cd6feddbadd392457e49eb (2018-06-17) hacked with `-Wnoerror`: 11m 37s. So there was a huge regression in the last two years! We have to find it out.
A profiling of the build has been done at: https://gem5.atlassian.net/browse/GEM5-277 Analysis there showed that d7d9bc240615625141cd6feddbadd392457e49eb (2018-06-17) is also composed of 50% pybind11 and with no obvious time sinks.