Hi, I saw a considerable slowdown with a microbenchmark on Linux systems with KPTI enabled vs. it being disabled. The benchmark performs no I/O but it is very futex-syscall-heavy. I unfortunately did not have the time to investigate further, but I also have the suspicion that the pagetable switching overhead when performing these syscalls is to blame. I would also be interested in more input on this.
Regards, Marvin On Monday, January 15, 2018 at 6:40:07 PM UTC+1, Francesco Nigro wrote: > > Hi guys! > > Any of you have already measured (or simply know) if OS mutexes are > somehow affected by Spectre/Meltdown? > > Cheers, > Franz > > -- You received this message because you are subscribed to the Google Groups "mechanical-sympathy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
