It was a thought that crossed my mind when Stefan pointed out the
translated Google Benchmark, but given that it hasn't yet been adapted
to work outside of i386 and x86_64, you are right that it probably
shouldn't be used for the time being. The framework uses CPU timings to
decide how many iterations to run, so obtaining such metrics is
essential for its operation. While I can probably get it to work for
aarch64-linux, I don't know the first thing about polling CPUs on
platforms I don't have access to! It was a nice experiment in the meantime.
In regards to "blea" being in the test suite, i haven't yet put it into
the normal test suite (using an include wrapper like I did with
"tests/bench/bcase.pp") since it's primarily to evalutate LEA timings
rather than testing compiler efficiency. It's more of a 'utility'
test. The feedback from others has proven useful in determining the
correctness of the new optimisation hint, which I intend to use to make
the i386/x86_64 peephole optimizer smarter in regards to using LEA
statements.
Kit
On 13/10/2023 16:36, Tomas Hajny via fpc-devel wrote:
On 2023-10-13 17:08, J. Gareth Moreton via fpc-devel wrote:
Interesting! That's a bug report to send to the maintainers of the
framework. I'll need to have them fix it before I'd be willing to try
again with its use in FPC.
Removed the reference. Apologies - I'm rushing a bit.
BTW, it's IMHO questionable whether a benchmark framework restricted
to just a subset of targets supported for the given architecture
should be really used within FPC source codes (if that's your
potential intention anyway). If it was intended for the testsuite, it
would immediately fail at compile time when checking the testsuite
under some other target, because the test doesn't specify that its use
should be restricted to certain targets (it's only restricted for i386
and x86_64 regardless of the operating system - that's fine for the
original version, but not for the benchmark framework).
Tomas
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