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gem5: update to 4c8efdbef45d98109769cf675ee3411393e8ed06

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The Linux boot was still broken after the previous gem5 update. Let's try
a new one...

Add the --no-ccache option to benchmark builds.
This commit is contained in:
Ciro Santilli 六四事件 法轮功
2020-02-26 00:00:00 +00:00
parent 7c6bb29bc8
commit 8a2cad195b
4 changed files with 22 additions and 2 deletions
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10
README.adoc
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@@ -20574,6 +20574,8 @@ Get results with:
tail -n+1 ../linux-kernel-module-cheat-regression/*/gem5-bench-build-*.txt
....
<<p51>>, Ubuntu 19.10, LKMC 7c6bb29bc89ec3f1056c0680c3f08bd64018a7bc GCC 9.2.1, gem5 d7d9bc240615625141cd6feddbadd392457e49eb (18-02-2020), `./build --arch aarch64 --gem5-worktree master --no-cache`: 19:33 TODO must investigate why it got so much worse.
====== Benchmark gem5 single file change rebuild time
This is the critical development parameter, and is dominated by the link time of huge binaries.
@@ -21155,6 +21157,14 @@ We have https://buildroot.org/downloads/manual/manual.html#ccache[enabled ccache
* absolute paths are used and GDB can find source files
* but builds are not reused across separated LKMC directories
ccache can be disabled with the `--no-ccache` option as in:
....
./build-gem5 --no-ccache
....
This can be useful to <<benchmark-build,benchmark builds>>.
=== getvar
The link:getvar[] helper script can print the values of internal LKMC variables.