Date: Thu, 9 Jun 2016 08:09:19 -0500 From: Jason Bacon <bacon4000@gmail.com> To: "freebsd-ppc@freebsd.org" <freebsd-ppc@freebsd.org> Subject: Detecting Power7 in C Message-ID: <765d3292-78ae-8b02-8a5b-43bafc68d9e8@gmail.com>
index | next in thread | raw e-mail
I'm porting the SLURM task/affinity plugin to FreeBSD and wondering
what's the best way to detect whether we're running on a power7 processor.
The Linux code is below. I could do something similar with dmesg.boot
on FreeBSD, but hoping there's a more elegant way within a C program.
If I have to use dmesg.boot, what string would I be looking for? I don't
have a power7 installation at the moment.
Thanks,
Jason
FILE *cpu_info_file;
char buffer[128];
char* _cpuinfo_path = "/proc/cpuinfo";
cpu_info_file = fopen(_cpuinfo_path, "r");
if (cpu_info_file == NULL) {
error("_get_is_power: error %d opening %s", errno,
_cpuinfo_path);
return false; /* assume not power processor */
}
is_power = 0;
while (fgets(buffer, sizeof(buffer), cpu_info_file) !=
NULL) {
if (strstr(buffer, "POWER7")) {
is_power = 1;
break;
}
}
fclose(cpu_info_file);
--
All wars are civil wars, because all men are brothers ... Each one owes
infinitely more to the human race than to the particular country in
which he was born.
-- Francois Fenelon
help
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?765d3292-78ae-8b02-8a5b-43bafc68d9e8>