Changes between Version 16 and Version 17 of notes/linux

Timestamp:

2017-03-01T17:51:41Z (8 years ago)

Author:

root

Comment:

--

notes/linux

@@ -114 +114 @@
 [[br]]
 
+== распределение прерывания по ядром с помощью `irq affinity`
+{{{#!bash
+#!/usr/bin/env bash
+cpu=`/bin/grep processor /proc/cpuinfo | wc -l`
+c=0
+for dir in rx tx; do
+ for eth in 0 1; do
+  for i in `seq 0 22`; do
+   irq=`/bin/grep "eth${eth}-${dir}-${i}$" /proc/interrupts |
+    awk -F : '{print $1}' |
+    sed -e 's/ //g'`
+   if [[ "x${irq}" == "x" ]]; then
+    continue
+   fi
+   mask="$((1<<($c+0)))"
+   echo mask: $mask, cpu: $c, irq: $irq
+   printf "%x\n" $mask >/proc/irq/$irq/smp_affinity
+   c=$((c+1))
+   if [[ $c -gt $cpu ]]; then
+    c=0
+   fi
+  done
+ done
+done
+}}}
+
+[[br]]
+