Model speeds are much slower than reported

[colinski]

Hey, so I've been using this repo as a starting point for running my own models on a GAPuino v2 (Revision B).

Overall its been working well, but the speeds I see are much slower than the speed reported in the README of this repo.

I've seen the same issue as discussed in #1, but that's not a problem as I don't need large models for my project.

However, when I run MobileNetV1 0.25 on 224x224 images I can average about 2 FPS, which is an order of magnitude slower than reported.

If I run the model using GVSOC I see a similar FPS to what is reported.

I'm using the newest version of the GAP SDK and running the code from this repo unaltered.

I see that your results were generated with a RevC, but I'm not sure if that would explain such a big difference in performance.

[sousoux]

What frequencies do you have the Cluster and FC set to?

[colinski]

I've been running it with FREQ_FC=250MHz and FREQ_CL=175MHz, following this repo.

[Pafrak]

hi @colinski
the Makefile sets 175MhZ for the cluster only if you have a gap8 RevC (GAP V3):

ifeq '$(TARGET_CHIP)' 'GAP8_V3'
FREQ_CL?=175
else
FREQ_CL?=50
endif

You can use this API in your code to verify that:

int32_t cur_fc_freq = pi_freq_get(PI_FREQ_DOMAIN_FC);
int32_t cur_cl_freq = pi_freq_get(PI_FREQ_DOMAIN_CL);