[issue35739] Enable verbose of tests during PGO build on amd64 platforms

[Jorge Ramos]

Jorge Ramos <neyuru at gmail.com> added the comment:

Mmm, I don't find that option documented in the readme of the MSI folder nor in the help for buildrelease.bat (and also is not intuitive, what does IIRC stand for?), nevertheless:

It should be no problem if this PR doesn't pass but it should help newcomers like me to debug builds (the option -q is also not documented in the buildrelease but I found that option tracking the build calls all the way to regrtest.py) I leave this info here if anyone benefits from it.

In fact I edited the PGO option in the buildrelease file to:

PGO= -m test --pgo -uall -j8 -M 27Gb -x test_bigmem test_bz2 test_codecs test_httpservers test_nntplib test_platform test_regrtest test_sysconfig test_zlib

The test suite now reads: PASS (I know, it is not necessary for all the tests to pass, but it is a nice view IMO). The benefit of the -j option is  that it permits some tests to pass when they where failing before this option. The option -uall opens resources to the tests, so that some of them will no longer be denied to tests (and therefore leaving no tests run -or skipped- by lack of resources). The 27Gb memory "allocated" to the tests is overkill, but my system could handle it (it may be that some tests need more than that but I have no further memory). 

Sure, it takes a long time to build (close to 1 hr) but it is the best way I have found so far to minimize the number of failed tests: with this option, only those 9 tests fail out of the 407 in Python 3.6 This info was found by disabling the quiet option, so that is another plus.

If you have time, can I ask a question related to the *.pgc files?

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<https://bugs.python.org/issue35739>
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