Linuxcnc wont run smi fix

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macona
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Junior Member

30 Oct 2013 14:04 #40412 by macona

Linuxcnc wont run smi fix was created by macona

Got a new P4 SMB for the industrial rack I am using. Runs really good, well, except for the smi spike every 64 seconds. It is a ICH4 (82801DB) chipset. I tried doing the fix, adding the lines necessary as per the page on it but it does not load.

Any ideas? Or will this even be noticeable with the 5i25 doing the pulsing?

-Jerry

My rtapi.conf:

# DO NOT EDIT THIS FILE !
#
# ../scripts/rtapi.conf.  Generated from rtapi.conf.in by configure. 
# on Sat Oct 15 18:51:38 UTC 2011
#

# A few parameters from emc2/Makefile.inc
EMC2_HOME=/usr
KERNELDIR=/usr/src/linux-headers-2.6.32-122-rtai
RTLIB_DIR=/usr/realtime-2.6.32-122-rtai/modules/emc2
MODULE_EXT=.ko
RTPREFIX=rtai

# Sets the default DEBUG level
DEBUG='1'

# Path to the realtime kernel modules
MODPATH=/usr/realtime-2.6.32-122-rtai/modules

#List of realtime kernel modules to be loaded
if [ "3" = "3" ] ; then \ 
    MODULES="adeos rtai_hal rtai_ksched rtai_fifos rtai_shm rtai_sem rtai_math rtai_smi"
    RTAI=3
    MODPATH_adeos=
    MODPATH_rtai_smi=/usr/realtime-$(uname -r)/modules/rtai_smi.ko
    MODPATH_rtai_hal=/usr/realtime-$(uname -r)/modules/rtai_hal.ko
    MODPATH_rtai_ksched=/usr/realtime-$(uname -r)/modules/rtai_ksched.ko
    MODPATH_rtai_fifos=/usr/realtime-$(uname -r)/modules/rtai_fifos.ko
    MODPATH_rtai_shm=/usr/realtime-$(uname -r)/modules/rtai_shm.ko
    MODPATH_rtai_sem=/usr/realtime-$(uname -r)/modules/rtai_sem.ko
    MODPATH_rtai_math=/usr/realtime-$(uname -r)/modules/rtai_math.ko
elif [ $RTPREFIX = rtai ] ; then
    MODULES="adeos rtai rt_mem_mgr rtai_sched rtai_fifos rtai_shm rtai_libm"
    MODPATH_adeos=
    MODPATH_rtai=
    MODPATH_rt_mem_mgr=
    MODPATH_rtai_sched=/usr/realtime-$(uname -r)/modules/rtai_sched.ko
    MODPATH_rtai_shm=
    MODPATH_rtai_libm=
elif [ $RTPREFIX = rtl ] ; then
    MODULES="rtl mbuff rtl_time rtl_sched rtl_posixio rtl_fifo"
    MODPATH_rtl=
    MODPATH_mbuff=
    MODPATH_rtl_time=
    MODPATH_rtl_sched=
    MODPATH_rtl_posixio=
    MODPATH_rtl_fifo=
fi

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ArcEye
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Junior Member

30 Oct 2013 15:47 #40413 by ArcEye

Replied by ArcEye on topic Linuxcnc wont run smi fix

It is a ICH4 (82801DB) chipset.

Only revisions 0 and 12 are affected by the SMI problem.
www.linuxcnc.org/index.php/english/forum...me-latency-solutions

Please attach a print from lspci -vv ( do lspci -vv > lspci.txt and attach that , 2 x v not 1 x w)

If the module loads and finds the chipset is not one it covers, it just unloads again

You should find an error message in dmesg

If you read the post at the bottom of the FAQ www.linuxcnc.org/index.php/english/forum...ency-solutions#36807
you will see that I had a similar problem, that was not SMI, and was resolved by ensuring fan control in particular was set so that no checking was done.

Or will this even be noticeable with the 5i25 doing the pulsing?

Overall average latency will be less important, but you still don't want big spikes

regards

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