On Thu, May 4, 2017 at 2:27 PM, Jiri Gaisler <j...@gaisler.se> wrote:
> > > On 05/04/2017 04:00 PM, Joel Sherrill wrote: > > > > On Thu, May 4, 2017 at 12:34 AM, Sebastian Huber < > sebastian.hu...@embedded-brains.de> wrote: > >> On 03/05/17 22:52, Joel Sherrill wrote: >> >>> Has anyone run the whetstone benchmark on real leon3 HW? >>> I'm almost at 20 minutes of simulated CPU time on tsim so >>> am suspicious something is wrong. >>> >>> Any ideas? >>> >> >> Maybe soft-float plus a low CPU frequency? Do you have a function >> profiling histogram of the execution? >> >> > It is the default leon3 build and the leon3 is simulated at 50Mhz. I have > never used profiling on tsim. Any guidance? > > The test did finally finish and here is the output of tsim's perf command: > > *** END OF TEST WHETSTONE *** > > Program exited normally. > tsim> perf > > > Cycles : 74462444473 > Instructions : 45632185502 > Overall CPI : 1.63 > > CPU performance (50.0 MHz) : 30.64 MOPS (30.64 MIPS, 0.00 MFLOPS) > Cache hit rate : 98.0 % (inst: 97.9, data:99.7) > AHB bandwidth utilisation : 34.8 % (inst: 14.1, data: 20.8) > Simulated time : 1489.25 s > Processor utilisation : 100.00 % > Real-time performance : 122.02 % > Simulator performance : 37.39 MIPS > Used time (sys + user) : 1220.46 s > > So it just took a LONG time. > > --joel > > > Note that TSIM reports 0.0 MFLOPS. This means that soft-float was used to > compile the benchmark. Using hard-float should give about 100x speed-up ... > > Thanks. I wonder if we should have a leon3 variant with hardware FPU enabled. --joel > Jiri. > > >
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