/
hybrid_fan_controller.pl
863 lines (686 loc) · 26.1 KB
/
hybrid_fan_controller.pl
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#!/usr/bin/env -S perl
# https://github.com/mrstux/hybrid_fan_control
# This script is designed to control both the CPU and HD fans in a Supermicro X10 based system according to both
# the CPU and HD temperatures in order to minimize noise while providing sufficient cooling to deal with scrubs
# and CPU torture tests.
# It relies on you having two fan zones.
# To use this correctly, you should connect all your PWM HD fans, by splitters if necessary to the FANA header.
# CPU, case and exhaust fans should then be connected to the numbered (ie CPU based) headers. This script will then control the
# HD fans in response to the HD temp, and the other fans in response to CPU temperature. When CPU temperature is high the HD fans.
# will be used to provide additional cooling, if you specify cpu/hd shared cooling.
# If the fans should be high, and they are stuck low, or vice-versa, the BMC will be rebooted, thus it is critical to set the
# cpu/hd_max_fan_speed variables correctly.
# NOTE: It is highly likely the "get_hd_temp" function will not work as-is with your HDs. Until a better solution is provided
# you will need to modify this function to properly acquire the temperature. Setting debug=2 will help.
# Tested with a SuperMicro X10-SRi-F, Xeon E5-1650v4, Noctua 120, 90 and 80mm fans in a Norco RPC-4224 4U chassis, with Seagate NAS drives.
# This script can be downloaded from : https://forums.freenas.org/index.php?threads/script-hybrid-cpu-hd-fan-zone-controller.46159/
# The script was originally based on a script by Kevin Horton that can be found at:
# https://forums.freenas.org/index.php?threads/script-to-control-fan-speed-in-response-to-hard-drive-temperatures.41294/page-3#post-282683
# More information on CPU/Peripheral Zone can be found in this post:
# https://forums.freenas.org/index.php?threads/thermal-and-accoustical-design-validation.28364/
# stux
# VERSION HISTORY
#####################
# 2016-09-19 Initial Version
# 2016-09-19 Added cpu_hd_override_temp, to prevent HD fans cycling when CPU fans are sufficient for cooling CPU
# 2016-09-26 hd_list is now refreshed before checking HD temps so that we start/stop monitoring devices that
# have been hot inserted/removed.
# "Drives are warm, going to 75%" log message was missing an unless clause causing it to print
# every time
# 2016-10-07 Replaced get_cpu_temp() function with get_cpu_temp_sysctl() which queries the kernel, instead of
# IPMI. This is faster, more accurate and more compatible. The original function is still present
# and is now called get_cpu_temp_ipmi(). Because this is a much faster method of reading the temps,
# and because its actually the max core temp, I found that the previous cpu_hd_override_temp of 60
# was too sensitive and caused the override too often. I've bumped it up to 62, which on my system
# seems good. This means that if a core gets to 62C the HD fans will kick in, and this will generally
# bring temps back down to around 60C... depending on the actual load. Your results will vary, and
# for best results you should tune controller with mprime testing at various thread levels. Updated
# the cpu threasholds to 35/45/55 because of the improved responsiveness of the get_cpu_temp function
# 2024-03-13 Ported to TrueNAS SCALE 23.10.2 (Cobia)
# - updated shebang to use /usr/bin/env
# - updated paths:
# - /usr/local/bin/ipmitool -> /usr/bin/ipmitool
# - /usr/local/bin/smartctl -> /usr/bin/smartctl
# - switched to get_cpu_temp_ipmi to read cpu temp (will probably write a scale version later)
# - fixed ipmitool bug by installing the enterpreise numbers. see https://forum.proxmox.com/threads/ipmi-tool-error-after-v8-upgrade.129334/
# `wget -O /usr/share/misc/enterprise-numbers.txt https://www.iana.org/assignments/enterprise-numbers.txt`
# - implement linux get_disks
# - implement linux sensors (lm-sensors) based cpu package temp reading
# - get_cpu_temp_sysctl renamed to get_cpu_temp_direct
# 2024-03-15 published to git: https://github.com/mrstux/hybrid_fan_control
# - script now runs without modification on SCALE and CORE (tested with TrueNAS SCALE 23.10.2 (Cobia)
# and TrueNAS CORE 13.0U6.1
# - tools are now called without the absolute path, thus requiring PATH to be correct
# - detects platform, and uses different cmd strings in get_disks and get_cpu_temp_direct
###############################################################################################
## CONFIGURATION
################
## DEBUG LEVEL
## 0 means no debugging. 1,2,3,4 provide more verbosity
## You should run this script in at least level 1 to verify its working correctly on your system
$debug = 1;
## CPU THRESHOLD TEMPS
## A modern CPU can heat up from 35C to 60C in a second or two. The fan duty cycle is set based on this
$high_cpu_temp = 55; # will go HIGH when we hit
$med_cpu_temp = 45; # will go MEDIUM when we hit, or drop below again
$low_cpu_temp = 35; # will go LOW when we fall below 35 again
## HD THRESHOLD TEMPS
## HDs change temperature slowly.
## This is the temperature that we regard as being uncomfortable. The higher this is the
## more silent your system.
## Note, it is possible for your HDs to go above this... but if your cooling is good, they shouldn't.
$hd_max_allowed_temp = 38; # celsius. you will hit 100% duty cycle when you HDs hit this temp.
## CPU TEMP TO OVERRIDE HD FANS
## when the CPU climbs above this temperature, the HD fans will be overridden
## this prevents the HD fans from spinning up when the CPU fans are capable of providing
## sufficient cooling.
$cpu_hd_override_temp = 62;
## CPU/HD SHARED COOLING
## If your HD fans contribute to the cooling of your CPU you should set this value.
## It will mean when you CPU heats up your HD fans will be turned up to help cool the
## case/cpu. This would only not apply if your HDs and fans are in a separate thermal compartment.
$hd_fans_cool_cpu = 1; # 1 if the hd fans should spin up to cool the cpu, 0 otherwise
#######################
## FAN CONFIGURATION
####################
## FAN SPEEDS
## You need to determine the actual max fan speeds that are achieved by the fans
## Connected to the cpu_fan_header and the hd_fan_header.
## These values are used to verify high/low fan speeds and trigger a BMC reset if necessary.
$cpu_max_fan_speed = 1700;
$hd_max_fan_speed = 1400;
## CPU FAN DUTY LEVELS
## These levels are used to control the CPU fans
$fan_duty_high = 100; # percentage on, ie 100% is full speed.
$fan_duty_med = 60;
$fan_duty_low = 30;
## HD FAN DUTY LEVELS
## These levels are used to control the HD fans
$hd_fan_duty_high = 100; # percentage on, ie 100% is full speed.
$hd_fan_duty_med_high = 80;
$hd_fan_duty_med_low = 50;
$hd_fan_duty_low = 30; # some 120mm fans stall below 30.
## FAN ZONES
# Your CPU/case fans should probably be connected to the main fan sockets, which are in fan zone zero
# Your HD fans should be connected to FANA which is in Zone 1
# You could switch the CPU/HD fans around, as long as you change the zones and fan header configurations.
#
# 0 = FAN1..5
# 1 = FANA
$cpu_fan_zone = 0;
$hd_fan_zone = 1;
## FAN HEADERS
## these are the fan headers which are used to verify the fan zone is high. FAN1+ are all in Zone 0, FANA is Zone 1.
## cpu_fan_header should be in the cpu_fan_zone
## hd_fan_header should be in the hd_fan_zone
$cpu_fan_header = "FAN1";
$hd_fan_header = "FANA";
################
## MISC
#######
## PLATFORM
## The platform is either "FreeBSD" or "Linux", and is determined by calling uname
$platform = `/usr/bin/uname`; # "FreeBSD" when on CORE or "Linux" on SCALE.
chomp $platform;
## IPMITOOL PATH
## ipmitool is used to invoke the IPMI tool to access the SuperMicro BMC
$ipmitool = "ipmitool";
## uncomment the following line, and replace HOST/ADMIN/PASSWORD with your IPMI credentials to access IPMI over the network
#$ipmitool = "$impitool -I lanplus -H HOST -U ADMIN -P PASSWORD"; # network access, necessary when running in a VM
## HD POLLING INTERVAL
## The controller will only poll the harddrives periodically. Since hard drives change temperature slowly
## this is a good thing. 180 seconds is a good value.
$hd_polling_interval = 180; # seconds
## FAN SPEED CHANGE DELAY TIME
## It takes the fans a few seconds to change speeds, we allow a grace before verifying. If we fail the verify
## we'll reset the BMC
$fan_speed_change_delay = 10; # seconds
## BMC REBOOT TIME
## It takes the BMC a number of seconds to reset and start providing sensible output. We'll only
## Reset the BMC if its still providing rubbish after this time.
$bmc_reboot_grace_time = 120; # seconds
## BMC RETRIES BEFORE REBOOTING
## We verify high/low of fans, and if they're not where they should be we reboot the BMC after so many failures
$bmc_fail_threshold = 1; # will retry n times before rebooting
# edit nothing below this line
########################################################################################################################
# GLOBALS
@hd_list = ();
# massage fan speeds
$cpu_max_fan_speed *= 0.8;
$hd_max_fan_speed *= 0.8;
#fan/bmc verification globals/timers
$last_fan_level_change_time = 0; # the time when we changed a fan level last
$fan_unreadable_time = 0; # the time when a fan read failure started, 0 if there is none.
$bmc_fail_count = 0; # how many times the fans failed verification in the last period.
#this is the last cpu temp that was read
$last_cpu_temp = 0;
use POSIX qw(strftime);
# start the controller
main();
################################################ MAIN
sub main
{
dprint(1, "Running on $platform\n");
# need to go to Full mode so we have unfettered control of Fans
set_fan_mode("full");
my $cpu_fan_level = "";
my $old_cpu_fan_level = "";
my $override_hd_fan_level = 0;
my $last_hd_check_time = 0;
my $hd_fan_duty = 0;
while()
{
$old_cpu_fan_level = $cpu_fan_level;
$cpu_fan_level = control_cpu_fan( $old_cpu_fan_level );
if( $old_cpu_fan_level ne $cpu_fan_level )
{
$last_fan_level_change_time = time;
}
if( $cpu_fan_level eq "high" )
{
if( $hd_fans_cool_cpu && !$override_hd_fan_level && ($last_cpu_temp >= $cpu_hd_override_temp || $last_cpu_temp == 0) )
{
#override hd fan zone level, once we override we won't backoff until the cpu drops to below "high"
$override_hd_fan_level = 1;
dprint( 0, "CPU Temp: $last_cpu_temp >= $cpu_hd_override_temp, Overiding HD fan zone to $hd_fan_duty_high%, \n" );
set_fan_zone_duty_cycle( $hd_fan_zone, $hd_fan_duty_high );
$last_fan_level_change_time = time;
}
}
elsif( $override_hd_fan_level )
{
#restore hd fan zone level;
$override_hd_fan_level = 0;
dprint( 0, "Restoring HD fan zone to $hd_fan_duty%\n" );
set_fan_zone_duty_cycle( $hd_fan_zone, $hd_fan_duty );
$last_fan_level_change_time = time;
}
# periodically determine hd fan zone level
my $check_time = time;
if( $check_time - $last_hd_check_time > $hd_polling_interval )
{
$last_hd_check_time = $check_time;
# we refresh the hd_list from camcontrol devlist
# everytime because if you're adding/removing HDs we want
# starting checking their temps too!
@hd_list = get_hd_list();
my $hd_temp = get_hd_temp();
$hd_fan_duty = calculate_hd_fan_duty_cycle( $hd_temp, $hd_fan_duty );
if( !$override_hd_fan_level )
{
set_fan_zone_duty_cycle( $hd_fan_zone, $hd_fan_duty );
$last_fan_level_change_time = time; # this resets every time, but it shouldn't matter since hd_polling_interval is large.
}
}
# verify_fan_speed_levels function is fairly complicated
verify_fan_speed_levels( $cpu_fan_level, $override_hd_fan_level ? $hd_fan_duty_high : $hd_fan_duty );
# CPU temps can go from cool to hot in 2 seconds! so we only ever sleep for 1 second.
sleep 1;
} # inf loop
}
sub get_hd_list
{
# the disk_list_cmd needs to return a list of space separated disks to monitor, ie "sda sdb sdc"
my $disk_list_cmd = $platform eq "FreeBSD" ?
"camcontrol devlist | sed 's:.*(::;s:).*::;s:,pass[0-9]*::;s:pass[0-9]*,::' | egrep '^[a]*da[0-9]+\$' | tr '\n' ' '"
:
"lsblk -o NAME --nodeps --noheading | egrep 'sd[a-z]+' | tr '\n' ' '"
;
my $disk_list = `$disk_list_cmd`;
dprint(3,"$disk_list\n");
my @vals = split(" ", $disk_list);
foreach my $item (@vals)
{
dprint(2,"$item\n");
}
return @vals;
}
sub get_hd_temp
{
my $max_temp = 0;
foreach my $item (@hd_list)
{
my $disk_dev = "/dev/$item";
my $command = "smartctl -A $disk_dev | grep Temperature_Celsius";
dprint( 3, "$command\n" );
my $output = `$command`;
dprint( 2, "$output");
my @vals = split(" ", $output);
# grab 10th item from the output, which is the hard drive temperature (on Seagate NAS HDs)
my $temp = "$vals[9]";
chomp $temp;
dprint( 3, "temp: $temp\n" );
if( $temp )
{
dprint( 1, "$disk_dev: $temp\n");
$max_temp = $temp if $temp > $max_temp;
}
}
dprint(0, "Maximum HD Temperature: $max_temp\n");
return $max_temp;
}
###########################
# verify_fan_speed_levels()
# this function verifies a fan zone is high, when it should be high, and low when it should be low.
# you pass in the cpu_fan_level and the hd_fan_duty (note: level vs duty!). If the hd fan duty is
# overridden, then you need to pass in the overridden duty.
#
# The tricks are that
# 1) we need to wait at least 10 seconds after changing a fan level before checking if its
# made the change.
# 2) if we do read the change, and its not right, we should try again, after redoing the change
# 3) when the BMC has been reset, we can read rubbish... we shouldn't just re-set the BMC in this case
# as it should become good, but it also might not become good... in which case we should reset it!
# 4) if we do reset the BMC, we need to reverify
# 5) we don't want to re-verify continuously, so if its all good we wait an extra 60 seconds, unless
# the fans change in the meantime.
#
# to accomplish that, we use a few globals:
#
# last_fan_level_change_time this is the time when the last fan change was made, and should be updated,
# whenever a fan change is made. We also updated it each time through the
# verify function so that we will not re-verify until our delay has expired
#
# fan_unreadable_time this is the time that the fan read failures started, or 0 if there are none
# once the failure has exceeded the bmc_reboot_grace_time threshold, we will reboot.
#
# bmc_fail_count this is how many times in a row the fan speeds have not been what they should've
# been. If we exceed bmc_fail_threshold, then we reboot the bmc.
#
# Configuration globals used:
#
# bmc_fail_threshold how many times the bmc can have the wrong fan speeds in a row before we reboot.
# fan_speed_change_delay how many seconds we wait until after fan change before verifying, and thence how
# often we verify.
# hd/cpu_max_fan_speed depending on if we want high or low, if the fan speed is over or under, we'll regard
# it as a failure.
#
sub verify_fan_speed_levels
{
my( $cpu_fan_level, $hd_fan_duty ) = @_;
dprint( 4, "verify_fan_speed_levels: cpu_fan_level: $cpu_fan_level, hd_fan_duty: $hd_fan_duty\n");
my $extra_delay_before_next_check = 0;
my $temp_time = time - $last_fan_level_change_time;
dprint( 4, "Time since last verify : $temp_time, last change: $last_fan_level_change_time, delay: $fan_speed_change_delay\n");
if( $temp_time > $fan_speed_change_delay )
{
# we've waited for the speed change to take effect.
my $cpu_fan_speed = get_fan_speed("CPU");
if( $cpu_fan_speed < 0 )
{
dprint(1,"CPU Fan speed unavailable\n" );
$fan_unreadable_time = time if $fan_unreadable_time == 0;
}
my $hd_fan_speed = get_fan_speed("HD");
if( $hd_fan_speed < 0 )
{
dprint(1,"HD Fan speed unavailable\n" );
$fan_unreadable_time = time if $fan_unreadable_time == 0;
}
if( $hd_fan_speed < 0 || $cpu_fan_speed < 0 )
{
# one of the fans couldn't be reliably read
my $temp_time = time - $fan_unreadable_time;
if( $temp_time > $bmc_reboot_grace_time )
{
#we've waited, and we still can't read fan speed.
dprint(0, "Fan speeds are unreadable after $bmc_reboot_grace_time seconds, rebooting BMC\n");
reset_bmc();
$fan_unreadable_time = 0;
}
else
{
dprint(2, "Fan speeds are unreadable after $temp_time seconds, will try again\n");
}
}
else
{
# we have no been able to read the fan speeds
my $cpu_fan_is_wrong = 0;
my $hd_fan_is_wrong = 0;
#verify cpu fans
if( $cpu_fan_level eq "high" && $cpu_fan_speed < $cpu_max_fan_speed )
{
dprint(0, "CPU fan speed should be high, but $cpu_fan_speed < $cpu_max_fan_speed.\n");
$cpu_fan_is_wrong=1;
}
elsif( $cpu_fan_level eq "low" && $cpu_fan_speed > $cpu_max_fan_speed )
{
dprint(0, "CPU fan speed should be low, but $cpu_fan_speed > $cpu_max_fan_speed.\n");
$cpu_fan_is_wrong=1;
}
#verify hd fans
if( $hd_fan_duty >= $hd_fan_duty_high && $hd_fan_speed < $hd_max_fan_speed )
{
dprint(0, "HD fan speed should be high, but $hd_fan_speed < $hd_max_fan_speed.\n");
$hd_fan_is_wrong=1;
}
elsif( $hd_fan_duty <= $hd_fan_duty_low && $hd_fan_speed > $hd_max_fan_speed )
{
dprint(0, "HD fan speed should be low, but $hd_fan_speed > $hd_max_fan_speed.\n");
$hd_fan_is_wrong=1;
}
#verify both fans are good
if( $cpu_fan_is_wrong || $hd_fan_is_wrong )
{
$bmc_fail_count++;
dprint( 3, "bmc_fail_count: $bmc_fail_count, bmc_fail_threshold: $bmc_fail_threshold\n");
if( $bmc_fail_count <= $bmc_fail_threshold )
{
#we'll try setting the fan speeds, and giving it another attempt
dprint(1, "Fan speeds are not where they should be, will try again.\n");
set_fan_mode("full");
set_fan_zone_level( $cpu_fan_zone, $cpu_fan_level );
set_fan_zone_duty_cycle( $hd_fan_zone, $hd_fan_duty );
}
else
{
#time to reset the bmc
dprint(1, "Fan speeds are still not where they should be after $bmc_fail_count attempts, will reboot BMC.\n");
set_fan_mode("full");
reset_bmc();
$bmc_fail_count = 0;
}
}
else
{
#everything is good. We'll sit back for another minute.
dprint( 2, "Verified fan levels, CPU: $cpu_fan_speed, HD: $hd_fan_speed. All good.\n" );
$bmc_fail_count = 0; # we succeeded
$extra_delay_before_next_check = 60 - $fan_speed_change_delay; # lets give it a minute since it was good.
}
#reset our unreadable timer, since we read the fan speeds.
$fan_unreadable_time = 0;
}
#reset our timer, so that we'll wait before checking again.
$last_fan_level_change_time = time + $extra_delay_before_next_check; #another delay before checking please.
}
return;
}
################################################# SUBS
# need to pass in last $cpu_fan
sub control_cpu_fan
{
my ($old_cpu_fan_level) = @_;
# my $cpu_temp = get_cpu_temp_ipmi(); # no longer used, because sysctl is better, and more compatible.
my $cpu_temp = get_cpu_temp_direct();
# my $cpu_temp = 65; # used to force high speed cpu fan...
my $cpu_fan_level = decide_cpu_fan_level( $cpu_temp, $old_cpu_fan_level );
if( $old_cpu_fan_level ne $cpu_fan_level )
{
dprint( 1, "CPU Fan changing... ($cpu_fan_level)\n");
set_fan_zone_level( $cpu_fan_zone, $cpu_fan_level );
}
return $cpu_fan_level;
}
sub calculate_hd_fan_duty_cycle
{
my ($hd_temp, $old_hd_duty) = @_;
my $hd_duty;
if ($hd_temp >= $hd_max_allowed_temp )
{
$hd_duty = $hd_fan_duty_high;
dprint(0, "Drives are too hot, going to $hd_fan_duty_high%\n") unless $old_hd_duty == $hd_duty;
}
elsif ($hd_temp >= $hd_max_allowed_temp - 1 )
{
$hd_duty = $hd_fan_duty_med_high;
dprint(0, "Drives are warm, going to $hd_fan_duty_med_high%\n") unless $old_hd_duty == $hd_duty;
}
elsif ($hd_temp >= $hd_max_allowed_temp - 2 )
{
$hd_duty = $hd_fan_duty_med_low;
dprint(0, "Drives are warming, going to $hd_fan_duty_med_low%\n") unless $old_hd_duty == $hd_duty;
}
elsif( $hd_temp > 0 )
{
$hd_duty = $hd_fan_duty_low;
dprint(0, "Drives are cool enough, going to $hd_fan_duty_low%\n") unless $old_hd_duty == $hd_duty;
}
else
{
$hd_duty = 100;
dprint( 0, "Drive temperature ($hd_temp) invalid. going to 100%\n");
}
return $hd_duty;
}
sub build_date_string
{
my $datestring = strftime "%F %H:%M:%S", localtime;
return $datestring;
}
sub dprint
{
my ( $level,$output) = @_;
# print( "dprintf: debug = $debug, level = $level, output = \"$output\"\n" );
if( $debug > $level )
{
my $datestring = build_date_string();
print "$datestring: $output";
}
return;
}
sub dprint_list
{
my ( $level,$name,@output) = @_;
if( $debug > $level )
{
dprint($level,"$name:\n");
foreach my $item (@output)
{
dprint( $level, " $item\n");
}
}
return;
}
sub bail_with_fans_full
{
dprint( 0, "Setting fans full before bailing!\n");
set_fan_mode("full");
die @_;
}
sub get_fan_mode_code
{
my ( $fan_mode ) = @_;
my $m;
if( $fan_mode eq 'standard' ) { $m = 0; }
elsif( $fan_mode eq 'full' ) { $m = 1; }
elsif( $fan_mode eq 'optimal' ) { $m = 2; }
elsif( $fan_mode eq 'heavyio' ) { $m = 4; }
else { die "illegal fan mode: $fan_mode\n" }
dprint( 3, "fanmode: $fan_mode = $m\n");
return $m;
}
sub set_fan_mode
{
my ($fan_mode) = @_;
my $mode = get_fan_mode_code( $fan_mode );
dprint( 1, "Setting fan mode to $mode ($fan_mode)\n");
`$ipmitool raw 0x30 0x45 0x01 $mode`;
sleep 5; #need to give the BMC some breathing room
return;
}
# returns the maximum core temperature from the kernel to determine CPU temperature.
# in my testing I found that the max core temperature was pretty much the same as the IPMI 'CPU Temp'
# value, but its much quicker to read, and doesn't require X10 IPMI. And works when the IPMI is rebooting too.
sub get_cpu_temp_direct
{
# the following command needs to return a list of temps for the cores, output is something like "50.0\n51.0\n"
my $core_temps = $platform eq "FreeBSD" ?
`sysctl -a dev.cpu | egrep -E \"dev.cpu\.[0-9]+\.temperature\" | awk '{print \$2}' | sed 's/.\$//'`
:
`sensors -A | egrep 'Core [0-9]+:' | awk '{print \$3}' | sed 's/[^0-9\.]*//g'`
;
chomp($core_temps);
dprint(3,"core_temps:\n$core_temps\n");
my @core_temps_list = split(" ", $core_temps);
dprint_list( 4, "core_temps_list", @core_temps_list );
my $max_core_temp = 0;
foreach my $core_temp (@core_temps_list)
{
if( $core_temp )
{
dprint( 2, "core_temp = $core_temp C\n");
$max_core_temp = $core_temp if $core_temp > $max_core_temp;
}
}
dprint(1, "CPU Temp: $max_core_temp\n");
$last_cpu_temp = $max_core_temp; #possible that this is 0 if there was a fault reading the core temps
return $max_core_temp;
}
# reads the IPMI 'CPU Temp' field to determine overall CPU temperature
sub get_cpu_temp_ipmi
{
my $cpu_temp = `$ipmitool sensor get \"CPU Temp\" | awk '/Sensor Reading/{print \$4}'`;
chomp $cpu_temp;
dprint( 1, "CPU Temp: $cpu_temp\n");
$last_cpu_temp = $cpu_temp; # note, this hasn't been cleaned.
return $cpu_temp;
}
sub decide_cpu_fan_level
{
my ($cpu_temp, $cpu_fan) = @_;
#if cpu_temp evaluates as "0", its most likely the reading returned rubbish.
if ($cpu_temp <= 0)
{
if( $cpu_temp eq "No") # "No reading"
{
dprint( 0, "CPU Temp has no reading.\n");
}
elsif( $cpu_temp eq "Disabled" )
{
dprint( 0, "CPU Temp reading disabled.\n");
}
else
{
dprint( 0, "Unexpected CPU Temp ($cpu_temp).\n");
}
dprint( 0, "Assuming worst-case and going high.\n");
$cpu_fan = "high";
}
else
{
if( $cpu_temp >= $high_cpu_temp )
{
if( $cpu_fan ne "high" )
{
dprint( 0, "CPU Temp: $cpu_temp >= $high_cpu_temp, CPU Fan going high.\n");
}
$cpu_fan = "high";
}
elsif( $cpu_temp >= $med_cpu_temp )
{
if( $cpu_fan ne "med" )
{
dprint( 0, "CPU Temp: $cpu_temp >= $med_cpu_temp, CPU Fan going med.\n");
}
$cpu_fan = "med";
}
elsif( $cpu_temp > $low_cpu_temp && ($cpu_fan eq "high" || $cpu_fan eq "" ) )
{
dprint( 0, "CPU Temp: $cpu_temp dropped below $med_cpu_temp, CPU Fan going med.\n");
$cpu_fan = "med";
}
elsif( $cpu_temp <= $low_cpu_temp )
{
if( $cpu_fan ne "low" )
{
dprint( 0, "CPU Temp: $cpu_temp <= $low_cpu_temp, CPU Fan going low.\n");
}
$cpu_fan = "low";
}
}
dprint( 1, "CPU Fan: $cpu_fan\n");
return $cpu_fan;
}
# zone,dutycycle%
sub set_fan_zone_duty_cycle
{
my ( $zone, $duty ) = @_;
if( $zone < 0 || $zone > 1 )
{
bail_with_fans_full( "Illegal Fan Zone" );
}
if( $duty < 0 || $duty > 100 )
{
dprint( 0, "illegal duty cycle, assuming 100%\n");
$duty = 100;
}
dprint( 1, "Setting Zone $zone duty cycle to $duty%\n");
`$ipmitool raw 0x30 0x70 0x66 0x01 $zone $duty`;
return;
}
sub set_fan_zone_level
{
my ( $fan_zone, $level) = @_;
my $duty = 0;
#assumes high if not low or med, for safety.
if( $level eq "low" )
{
$duty = $fan_duty_low;
}
elsif( $level eq "med" )
{
$duty = $fan_duty_med;
}
else
{
$duty = $fan_duty_high;
}
set_fan_zone_duty_cycle( $fan_zone, $duty );
}
sub get_fan_header_by_name
{
my ($fan_name) = @_;
if( $fan_name eq "CPU" )
{
return $cpu_fan_header;
}
elsif( $fan_name eq "HD" )
{
return $hd_fan_header;
}
else
{
bail_with_full_fans( "No such fan : $fan_name\n" );
}
}
sub get_fan_speed
{
my ($fan_name) = @_;
my $fan = get_fan_header_by_name( $fan_name );
my $command = "$ipmitool sdr | grep $fan";
dprint( 4, "get fan speed command = $command\n");
my $output = `$command`;
my @vals = split(" ", $output);
my $fan_speed = "$vals[2]";
dprint( 3, "fan_speed = $fan_speed\n");
if( $fan_speed eq "no" )
{
dprint( 0, "$fan_name Fan speed: No reading\n");
$fan_speed = -1;
}
elsif( $fan_speed eq "disabled" )
{
dprint( 0, "$fan_name Fan speed: Disabled\n");
$fan_speed = -1;
}
elsif( $fan_speed > 10000 || $fan_speed < 0 )
{
dprint( 0, "$fan_name Fan speed: $fan_speed RPM, is nonsensical\n");
$fan_speed = -1;
}
else
{
dprint( 1, "$fan_name Fan speed: $fan_speed RPM\n");
}
return $fan_speed;
}
sub reset_bmc
{
#when the BMC reboots, it comes back up in its last fan mode... which should be FULL.
dprint( 0, "Resetting BMC\n");
`$ipmitool bmc reset cold`;
return;
}