Test takes a very long time on a 32 cpu machine

[doug65536]

The test has been running about 24 hours now on my 16-core, 32-thread 3950X with dual channel 64GB DDR4-2400 ECC memory on Linux (Ubuntu x86_64 19.04 LTS). I compiled it from the source tarball on the website. Is the test expected to take days to complete on a machine with many CPUs? I'm starting to doubt that it will ever finish.

Here is some of the latest output:

run time = 1.54818 -> next test with repeat factor=11710012914
RESULT	datetime=2019-12-07 20:56:01	host=doug-dt	version=0.6.2	funcname=PermRead64SimpleLoop	nthreads=24	areasize=65536	threadsize=2816	testsize=67584	repeats=4291965	testvol=290068162560	testaccess=36258520320	time=1.5481844719615764916	bandwidth=187360206624.78201294	rate=4.269850116050120098e-11
Running nthreads=24 factor=11710012914 areasize=98304 thrsize=4224 testsize=101376 repeats=2772257 testvol=281040325632 testaccess=35130040704
Make permutation: filling filling filling filling filling filling filling filling filling filling filling filling filling filling filling permuting filling cycle= permuting permuting cycle=528 cycle=528 permuting permuting permuting cycle=528 permuting cycle=528 cycle=528 permuting permuting filling permuting cycle=528 cycle=528 permuting filling permuting permuting cycle=528 filling cycle=528 filling permuting cycle=528 filling cycle=528 filling permuting cycle= permuting permuting cycle= permuting cycle= permuting permuting528528 permuting528 cycle= filling cycle= permuting528 permuting528 filling cycle=528 cycle=528 cycle= permuting cycle=528528528 cycle= cycle=528528 cycle=528
run time = 1.50383 -> next test with repeat factor=11680189154
RESULT	datetime=2019-12-07 20:56:02	host=doug-dt	version=0.6.2	funcname=PermRead64SimpleLoop	nthreads=24	areasize=98304	threadsize=4224	testsize=101376	repeats=2772257	testvol=281040325632	testaccess=35130040704	time=1.5038301280001178384	bandwidth=186883026479.68893433	rate=4.2807525919800250103e-11
Running nthreads=24 factor=11680189154 areasize=131072 thrsize=5504 testsize=132096 repeats=2122128 testvol=280324620288 testaccess=35040577536
Make permutation: filling filling filling filling filling permuting filling permuting filling permuting filling permuting permuting cycle=688 cycle= filling688 filling permuting filling permuting filling permuting cycle=688 filling permuting filling filling permuting cycle=688 filling filling filling filling permuting permuting permuting filling filling cycle=688 filling filling cycle=688 permuting cycle=688 cycle= cycle=688 permuting permuting cycle=688 cycle=688 permuting permuting cycle= cycle=688 cycle=688 cycle=688 cycle=688 cycle=688 permuting filling688688 cycle=688 permuting permuting cycle= cycle=688 permuting cycle=688 permuting permuting688 cycle=688 cycle=688 cycle=688
run time = 1.48091 -> next test with repeat factor=11830762260
RESULT	datetime=2019-12-07 20:56:04	host=doug-dt	version=0.6.2	funcname=PermRead64SimpleLoop	nthreads=24	areasize=131072	threadsize=5504	testsize=132096	repeats=2122128	testvol=280324620288	testaccess=35040577536	time=1.4809095459640957415	bandwidth=189292196172.2545166	rate=4.2262703702375861194e-11
Running nthreads=24 factor=11830762260 areasize=196608 thrsize=8320 testsize=199680 repeats=1421967 testvol=283938370560 testaccess=35492296320
Make permutation: filling permuting filling filling filling filling filling filling filling filling filling filling permuting filling filling filling permuting filling permuting filling cycle=1040 permuting cycle=1040 cycle=1040 permuting permuting permuting filling permuting filling cycle= permuting filling cycle= permuting permuting cycle= cycle=1040 permuting cycle=1040 permuting permuting cycle= permuting1040 filling permuting filling permuting cycle=1040 permuting cycle=1040 filling permuting1040 permuting cycle=1040 cycle= cycle=1040 cycle=1040 cycle=10401040 cycle=1040 cycle=1040 cycle=1040 cycle=1040 filling permuting1040 cycle=1040 cycle=10401040 filling permuting permuting cycle=1040 cycle=1040
run time = 1.4521 -> next test with repeat factor=12220991348
RESULT	datetime=2019-12-07 20:56:05	host=doug-dt	version=0.6.2	funcname=PermRead64SimpleLoop	nthreads=24	areasize=196608	threadsize=8320	testsize=199680	repeats=1421967	testvol=283938370560	testaccess=35492296320	time=1.4521038149832747877	bandwidth=195535861575.62045288	rate=4.0913211190705924444e-11
Running nthreads=24 factor=12220991348 areasize=262144 thrsize=11008 testsize=264192 repeats=1110192 testvol=293303844864 testaccess=36662980608
Make permutation: filling filling filling filling filling filling permuting filling filling permuting filling permuting filling cycle= permuting filling permuting filling permuting cycle=1376 filling filling permuting permuting cycle= permuting permuting cycle= cycle=1376 filling filling permuting cycle= cycle=1376 filling permuting filling permuting cycle= permuting1376 filling permuting permuting permuting filling cycle=1376 cycle=13761376 cycle=1376 filling filling permuting cycle=13761376 cycle=13761376 cycle=1376 permuting permuting filling permuting filling permuting cycle=1376 cycle= permuting permuting1376 cycle=1376 cycle=1376 cycle=1376 cycle=1376 cycle=13761376 cycle=1376 cycle

Does that look right?

[robobenklein]

Just to leave some additional info here, I ran this on a 7950X with 128GB DDR5 and had to limit it to 4GB of tested memory (without -S 0 or with -M 4G), for which it finished in over a day.