FreeBSD Bugzilla – Attachment 186809 Details for
Bug 218262
[hwpstate] does not set overclocked frequency on AMD Ryzen CPU
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zenstate.c
zenstate.c (text/x-csrc), 612 bytes, created by
Val Packett
on 2017-09-29 21:38:59 UTC
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Description:
zenstate.c
Filename:
MIME Type:
Creator:
Val Packett
Created:
2017-09-29 21:38:59 UTC
Size:
612 bytes
patch
obsolete
>// before running: # kldload cpuctl >#include <stdio.h> >#include <stdint.h> >#include <fcntl.h> >#include <unistd.h> >#include <sys/ioctl.h> >#include <sys/cpuctl.h> > >int main() { > cpuctl_msr_args_t setp0 = { 0xc0010062, 0 }, getp = { 0xc0010063, 0 }; > for (int cpu = 0; cpu < 15; cpu++) { > char path[32]; > sprintf((char*)&path, "/dev/cpuctl%d", cpu); > int fd = open(path, O_RDWR); > printf("%s wrmsr return %d\n", path, ioctl(fd, CPUCTL_WRMSR, &setp0)); > printf("%s rdmsr return %d", path, ioctl(fd, CPUCTL_RDMSR, &getp)); > printf(" value %lx\n", getp.data); > close(fd); > } >}
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bug 218262
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