On Sun, Apr 12, 2020 at 12:03:13AM -0400, Jeffrey Walton via cfarm-users wrote: > GCC135 is a Power9 machine. Benchmarking on the machine shows > performance is off. For example, here are some numbers for AES in ECB > mode: > > GCC112 (Linux, ppc64le, 3.7 GHz, GCC 8.2): > * 1.12 cpb, 2851 MB/s > > GCC119 (AIX, ppc64be, 4.1 GHz, GCC 8.2): > * 0.54 cpb, 7242 MB/s > > GCC135 (Linux, ppc64le, 3.8 GHz, GCC 8.3): > * 1.94 cpb, 1815 MB/s
What source code did you use for this test? > All algorithms show a similar slowdown. SHA is so slow I am > considering disabling in-core crypto for SHA and going back to the > integer unit. > > What is different about GCC135? Is the Power9 hardware really that slow? Generally no: https://www.ibm.com/downloads/cas/K90RQOW8 Your source code or compiler may tune poorly for POWER9. I assume you checked that gcc135 was lightly loaded at the time of your test. _______________________________________________ cfarm-users mailing list [email protected] https://lists.tetaneutral.net/listinfo/cfarm-users
