d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Calculate the average CPU clock frequency and export that through

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
sys/sparc64/sparc64/identcpu.c
View File

@ -27,6 +27,13 @@ static char cpu_model[128];
SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD,
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;
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),
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++;
}