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Calculate the average CPU clock frequency and export that through

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the hw.freq.cpu sysctl variable. This can be used by ports that
need to know "the" CPU frequency.
This commit is contained in:
Marcel Moolenaar 2009-12-23 06:52:12 +00:00
parent 2191712fd1
commit d9c849eceb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=200891
1 changed files with 14 additions and 0 deletions
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14
sys/sparc64/sparc64/identcpu.c
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@ -27,6 +27,13 @@ static char cpu_model[128];
SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD,
cpu_model, 0, "Machine model"); cpu_model, 0, "Machine model");
SYSCTL_NODE(_hw, OID_AUTO, freq, CTLFLAG_RD, 0, "");
static u_int cpu_count;
static u_int cpu_freq;
SYSCTL_UINT(_hw_freq, OID_AUTO, cpu, CTLFLAG_RD, &cpu_freq, 0,
"CPU clock frequency");
int cpu_impl; int cpu_impl;
void void
@ -104,4 +111,11 @@ cpu_identify(u_long vers, u_int freq, u_int id)
printf(" mask=0x%lx maxtl=%ld maxwin=%ld\n", VER_MASK(vers), printf(" mask=0x%lx maxtl=%ld maxwin=%ld\n", VER_MASK(vers),
VER_MAXTL(vers), VER_MAXWIN(vers)); VER_MAXTL(vers), VER_MAXWIN(vers));
} }
/*
* Calculate the average CPU frequency.
*/
freq = (freq + 500000ul) / 1000000ul;
cpu_freq = (cpu_freq * cpu_count + freq) / (cpu_count + 1);
cpu_count++;
} }