I’ve bumped the CPU clock rate on my Unmatched to 1.4 GHz. It seems fine so far. As a test, I built the clang 12.0.0 compiler, which takes 13.5 hours at 1.4 GHz (with clang-tools-extra, libcxx and libcxxabi).
Unfortunately, the build doesn’t work. I get this error, which is usually taken care of on x86 by installing gcc-multilib. But there is no gcc-multilib on Ubuntu riscv64. This also prevents building gcc.
ubuntu@riscv64:~/xfer$ clang -O2 xport.c In file included from xport.c:5: /usr/include/stdio.h:27:10: fatal error: 'bits/libc-header-start.h' file not found #include <bits/libc-header-start.h> ^~~~~~~~~~~~~~~~~~~~~~~~~~ 1 error generated. ubuntu@riscv64:~/xfer$
If anyone knows what’s going on with that, please chime in. Also, if anyone has some good stress tests to run, I’ll be happy to give them a try. I’ve tried stress-ng, but I’m not sure what’s the best test.
And just for fun, here’s a video of the Unmatched running GNU Radio. This flow is a DVB-S2 transmitter sending digital television over the air with a transmit capable SDR (connected with USB 3.0). Sorry, no YouTube (or Google) account.