Hi, Michael, On Thu, 21 May 2020 at 11:46, Michael Büsch <m@xxxxxxx> wrote: > > Great. Thank you for testing. > > Should we consider defaulting hwcrypto to off? IMHO, not without testing. See below. :) > I wonder what the performance penalty is, if any, on today's CPUs > that have some HW-crypto embedded. Of course that depends on whether we > actually use that here. > > Could we have some benchmarks (throughput and CPU load wise)? I'm preparing to do some performance tests as we speak. Nothing too elaborate, just transferring a file over NFS and having a look at the CPU usage, with both hardware crypto enabled/disabled (while I initially thought of doing it over SFTP, the crypto overhead will surely overwhelm this system). Do you suggest a more scientifically acceptable test? Also note that this a PowerPC laptop (iBook G4). This means it's using the generic C crypto algorithms, there are no SIMD (VMX/AltiVec) implementations of AES and friends on PowerPC, at least from what I've seen in the kconfig. Thanks, Rui
