After copying the GPU files to my Gentoo install and installing opencl and pyopencl I ran a python benchmark below to see the difference in speed between the CPU and GPU
# example provided by Roger Pau Monn'e
import pyopencl as cl
import numpy
import numpy.linalg as la
import datetime
from time import time
a = numpy.random.rand(1000).astype(numpy.float32)
b = numpy.random.rand(1000).astype(numpy.float32)
c_result = numpy.empty_like(a)
# Speed in normal CPU usage
time1 = time()
for i in range(1000):
for j in range(1000):
c_result[i] = a[i] + b[i]
c_result[i] = c_result[i] * (a[i] + b[i])
c_result[i] = c_result[i] * (a[i] / 2.0)
time2 = time()
print ("Execution time of test without OpenCL: ", time2 - time1, "s")
for platform in cl.get_platforms():
for device in platform.get_devices():
print ("===============================================================")
print ("Platform name:", platform.name)
print ("Platform profile:", platform.profile)
print ("Platform vendor:", platform.vendor)
print ("Platform version:", platform.version)
print ("---------------------------------------------------------------")
print ("Device name:", device.name)
print ("Device type:", cl.device_type.to_string(device.type))
print ("Device memory: ", device.global_mem_size//1024//1024, 'MB')
print ("Device max clock speed:", device.max_clock_frequency, 'MHz')
print ("Device compute units:", device.max_compute_units)
# Simnple speed test
ctx = cl.Context([device])
queue = cl.CommandQueue(ctx,
properties=cl.command_queue_properties.PROFILING_ENABLE)
mf = cl.mem_flags
a_buf = cl.Buffer(ctx, mf.READ_ONLY | mf.COPY_HOST_PTR, hostbuf=a)
b_buf = cl.Buffer(ctx, mf.READ_ONLY | mf.COPY_HOST_PTR, hostbuf=b)
dest_buf = cl.Buffer(ctx, mf.WRITE_ONLY, b.nbytes)
prg = cl.Program(ctx, """
__kernel void sum(__global const float *a,
__global const float *b, __global float *c)
{
int loop;
int gid = get_global_id(0);
for(loop=0; loop<1000;loop++)
{
c[gid] = a[gid] + b[gid];
c[gid] = c[gid] * (a[gid] + b[gid]);
c[gid] = c[gid] * (a[gid] / 2.0);
}
}
""").build()
exec_evt = prg.sum(queue, a.shape, None, a_buf, b_buf, dest_buf)
exec_evt.wait()
elapsed = 1e-9*(exec_evt.profile.end - exec_evt.profile.start)
print ("Execution time of test: %g s" % elapsed)
c = numpy.empty_like(a)
cl._enqueue_read_buffer(queue, dest_buf, c).wait()
error = 0
for i in range(1000):
if c[i] != c_result[i]:
error = 1
if error:
print ("Results doesn't match!!")
else:
print ("Results OK")
Here is the result
StarFive ~ # python test.py
Execution time of test without OpenCL: 34.012295722961426 s
===============================================================
Platform name: PowerVR
Platform profile: EMBEDDED_PROFILE
Platform vendor: Imagination Technologies
Platform version: OpenCL 3.0
---------------------------------------------------------------
Device name: PowerVR B-Series BXE-4-32
Device type: ALL | GPU
Device memory: 7927 MB
Device max clock speed: 594 MHz
Device compute units: 1
Execution time of test: 0.014952 s
Results OK
In case someone want to use GUI with gentoo on StarFive 2, I created gentoo overlay for building mesa-21.3.9 with img-gpu-powervr-bin-1.17.6210866 in bing c / gentoo-overlay · GitLab
If you want to try one of the latest version of Chromium on your VisionFive 2 running Gentoo I have created a Pull Request on the riscv Gentoo Overlay. It is for www-client/chromium: 123.0.6312.58 and takes 3-4 days to emerge.
I have it running and it seems faster than Firefox on my VisionFive 2.
If it works for you please comment on the PR and let them know that you have successfully emerged and it.
Thanks for sharing your work with us! But whenever I try to download the file it is corrupted. The size is 6203585782 bytes. Is this correct? I’m downloading with Ubuntu and Brave browser.
Hi Andrew! The updated link and image works fine. Some things I’ve to change after initial boot (please let me know if this is completely stupid as I’m totally new to gentoo):
after selecting profile “8” which is “default/linux/riscv/20.0/rv64gc/lp64d/desktop/plasma/systemd/merged-usr” I’ve to execute merge-usr. To install “merge-usr” I’ve to copy the relevant bin files from /bin to /usr/bin before.
I’ve made a “emerge --update --newuse --deep --with-bdeps=y @world”. Which worked for most of the packages. But I needed to add a swap space, otherwise the cc runs out of memory.
After all your image helped me a lot to get startet with gentoo and I already like it a lot on the VisionFive2!
@ioasiodf The last image I posted should bootup fine unless the image or SDCARD is corrupted. Have you tried to download it again and use a different SDCARD?
Have you tried the standard debian image to see if that works?
Started this process two hours ago … is this life a simulation?