Yes, in VirtualBox on this machine I have Processors set to 4 and the Execution Cap set to 100% (i.e., no limit). I've also tried it on a real Windows 7 machine which has 2 cores & that only uses 1 thread and I've tried it on another VirtualBox, again it only uses 1 thread.
I've now tried the du4 example from "The Go Programming Language" book. My code is based on this example, but whereas du4 briefly peaks at 70-80% CPU my own code never exceeds 50%. So I guess the problem is with my code:-( On Monday, February 27, 2017 at 6:59:11 PM UTC, Guillermo Estrada wrote: > > Are you sure your virtual machine has 4 cores assigned? You might have 4 > cores, but when you create the VM you can assign any number of cores to it > (1 being default IIRC). > > On Monday, February 27, 2017 at 12:39:31 PM UTC-6, Mark wrote: >> >> I just tried this on an old Windows 7-32bit machine which reports >> GOMAXPROCS of 2 but only one is ever used. >> >> On Monday, February 27, 2017 at 5:32:17 PM UTC, Mark wrote: >>> >>> I have a Go app that only uses 1 thread when GOMAXPROCS is 4 on Windows >>> 7-64bit inside VirtualBox even though I can have up to 20 goroutines. Is >>> this a known problem? And is there a solution that can force Go to use all >>> 4 CPUs? (The underlying hardware is a 64-bit i7.) >>> Thanks. >>> >> -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
