Il ven 6 ott 2023, 20:36 Richard W.M. Jones <rjones@xxxxxxxxxx> ha scritto:
I patched my copy of qemu to add ../configure --disable-qom-cast-debug
flag. This reduced the time taken to run two test compiles inside the
guest from [465, 467] seconds down to [445, 441] seconds, which is a
saving of about 5%.
Or ... maybe someone knows a way to disable the debugging code when
called from particular call sites?
You can replace the hottest sites with just a C cast. The only one I see in the flame graph is cpu_get_tb_cpu_state().
Paolo
Rich.
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