On 02/05/2016 10:49 AM, Quinn Tran wrote:
> On 2/4/16, 10:20 AM, "Bart Van Assche" <bart.vanassche@xxxxxxxxxxx> wrote:
>> On 02/04/2016 08:45 AM, Himanshu Madhani wrote:
>>> From: Quinn Tran <quinn.tran@xxxxxxxxxx>
>>>
>>>> cat /sys/kernel/debug/qla2xxx/*/irq_cpuid
>>> qla2xxx_81
>>> IRQ Name Vector CPUID
>>> qla2xxx (default) 150 9
>>> qla2xxx (rsp_q) 151 9
>>> qla2xxx (atio_q) 152 9
>>
>> Hello Quinn and Himanshu,
>>
>> Do you think it would be possible to generate this information via a
>> user-space script from /proc/interrupts and /proc/irq/<n>/smp_affinity?
>>
>> Thanks,
>>
>> Bart.
>
> Bart,
>
> Currently, the data from the 2 mentioned “/proc” entry points were not able to give us the host_id/port & the vector information.
>
> The 2 alternatives are i) change the driver code to register host id along with the vector and add script to combine the infos, ii) 1 code change that gives us the summary.
>
> We choose path 2 for the ease of usage.
Hello Quinn,
Please have another look at /proc/interrupts and
/proc/irq/<n>/smp_affinity. The information that is exported through
this patch is already available there. This is why I think this patch
should be dropped. All you need is something like the shell script below.
Sample output (nn = NUMA node; num = IRQ vector):
==== IRQs
nn cpu num count name
0 6 105 1753 PCI-MSI-edge qla2xxx (rsp_q)
1 1 104 8781 PCI-MSI-edge qla2xxx (default)
1 1 107 1629 PCI-MSI-edge qla2xxx (rsp_q)
The shell script that produced the above output:
ppi() {
{ echo "$(<"/sys/devices/system/cpu/cpu$1/topology/physical_package_id")" || echo '?'; } 2>/dev/null
}
echo "==== IRQs"
printf "%-2s %-3s %-3s %12s %-50s\n" nn cpu num count name
cat /proc/interrupts |
while read line; do
num="$(echo "$line" | sed -n 's/^[[:blank:]]*\([0-9]*\):\([0-9[:blank:]]*\)\(.*\)/\1/p')"
[ -z "$num" ] && continue
count=0
for c in $(echo "$line" | sed -n 's/^[[:blank:]]*\([0-9]*\):\([0-9[:blank:]]*\)\(.*\)/\2/p'); do
count=$((count+c))
done
name="$(echo "$line" | sed -n 's/^[[:blank:]]*\([0-9]*\):\([0-9[:blank:]]*\)\(.*\)/\3/p')"
if [ -r "/proc/irq/$num/smp_affinity_list" ]; then
al="$(<"/proc/irq/$num/smp_affinity_list")"
cpu="${al/-*}"
cpu="${cpu/,*}"
ppi="$(ppi "$cpu")"
else
cpu="?"
ppi="?"
fi
printf "%-2s %-3d %-3d %12d %-50s\n" "$ppi" "$cpu" "$num" "$count" "$name"
done |
sort -n -k1,3
Thanks,
Bart.
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