[PATCH 1/2] test_tools: added pin_dev_irqs

[Jan Tluka]

This tool can be used to move IRQs assigned to a device to a specific CPU.

It's a simple shell script that takes two arguments, device name and
cpu. IRQs are determined by device name.

Signed-off-by: Jan Tluka <jtluka(a)redhat.com&gt;
---
 test_tools/pin_dev_irqs/lnst-setup.sh   |  4 ++++
 test_tools/pin_dev_irqs/pin_dev_irqs.sh | 14 ++++++++++++++
 2 files changed, 18 insertions(+)
 create mode 100755 test_tools/pin_dev_irqs/lnst-setup.sh
 create mode 100755 test_tools/pin_dev_irqs/pin_dev_irqs.sh

diff --git a/test_tools/pin_dev_irqs/lnst-setup.sh
b/test_tools/pin_dev_irqs/lnst-setup.sh
new file mode 100755
index 0000000..feab344
--- /dev/null
+++ b/test_tools/pin_dev_irqs/lnst-setup.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+chmod u+x pin_dev_irqs.sh
+
diff --git a/test_tools/pin_dev_irqs/pin_dev_irqs.sh
b/test_tools/pin_dev_irqs/pin_dev_irqs.sh
new file mode 100755
index 0000000..316f14d
--- /dev/null
+++ b/test_tools/pin_dev_irqs/pin_dev_irqs.sh
@@ -0,0 +1,14 @@
+#!/bin/bash
+
+DEV=$1
+CPU=$2
+
+dev_irqs=`grep $DEV /proc/interrupts | cut -f1 -d: | sed 's/ //'`
+
+for irq in $dev_irqs; do
+	echo "current cpu list for irq $irq"
+	cat /proc/irq/$irq/smp_affinity_list
+	echo "reassigning irq $irq to cpu $CPU"
+	echo $CPU > /proc/irq/$irq/smp_affinity_list
+done
+
-- 
2.4.3