On Tue, Sep 08, 2020 at 10:10:17AM -0700, Srinivas Pandruvada wrote:
> > > - if (reg == MSR_IA32_ENERGY_PERF_BIAS)
> > > + switch (reg) {
> > > + case MSR_IA32_ENERGY_PERF_BIAS:
> There is already sysfs interface for it.
So someone needs to convert all those to it:
tools/power/cpupower/utils/helpers/msr.c:14:#define MSR_IA32_ENERGY_PERF_BIAS
0x1b0
tools/power/cpupower/utils/helpers/msr.c:84: ret = read_msr(cpu,
MSR_IA32_ENERGY_PERF_BIAS, &val);
tools/power/cpupower/utils/helpers/msr.c:97: ret = write_msr(cpu,
MSR_IA32_ENERGY_PERF_BIAS, val);
tools/power/x86/turbostat/turbostat.8:222:cpu0: MSR_IA32_ENERGY_PERF_BIAS:
0x00000006 (balanced)
tools/power/x86/turbostat/turbostat.c:3652: if (get_msr(cpu,
MSR_IA32_ENERGY_PERF_BIAS, &msr))
tools/power/x86/turbostat/turbostat.c:3669: fprintf(outf, "cpu%d:
MSR_IA32_ENERGY_PERF_BIAS: 0x%08llx (%s)\n", cpu, msr, epb_string);
tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.8:25:Policy in
MSR_IA32_ENERGY_PERF_BIAS (EPB)
tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.8:33:Note that
MSR_IA32_ENERGY_PERF_BIAS is defined per CPU,
tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c:84:unsigned int
has_epb; /* MSR_IA32_ENERGY_PERF_BIAS */
tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c:755:
get_msr(cpu, MSR_IA32_ENERGY_PERF_BIAS, &msr);
tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c:1044:
get_msr(cpu, MSR_IA32_ENERGY_PERF_BIAS, &msr);
tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c:1045:
put_msr(cpu, MSR_IA32_ENERGY_PERF_BIAS, new_epb);
Any takers?
If there are none, it could be made into a small kernelnewbies
project...
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
