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From 3eae2edd136540898f8e51546eedfb56729f938d Mon Sep 17 00:00:00 2001
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From: Xiao Liang <xiliang@redhat.com>
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Date: Thu, 18 Oct 2018 21:50:33 +0800
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Subject: procinterrupts: check xen-dyn-event more flexible
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In current /proc/interrupts, the 'xen-dyn-event' was split to 'xen-dyn -event'.
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It causes interrupts not balanced inside xen guest.
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Below result is without this patch:
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70: 29 0 0 0 xen-dyn -event vif0-q0-tx
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71: 120 0 0 0 xen-dyn -event vif0-q0-rx
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72: 586350 0 0 0 xen-dyn -event vif0-q1-tx
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73: 44 0 0 0 xen-dyn -event vif0-q1-rx
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74: 19 0 0 0 xen-dyn -event vif0-q2-tx
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75: 179 0 0 0 xen-dyn -event vif0-q2-rx
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76: 67 0 0 0 xen-dyn -event vif0-q3-tx
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77: 299637 0 0 0 xen-dyn -event vif0-q3-rx
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Below result is with this patch:
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[root@dhcp-3-194 ~]# grep vif0 /proc/interrupts
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70: 30 0 0 0 xen-dyn -event vif0-q0-tx
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71: 305 0 11 0 xen-dyn -event vif0-q0-rx
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72: 586354 0 27 0 xen-dyn -event vif0-q1-tx
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73: 49 7 5 0 xen-dyn -event vif0-q1-rx
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74: 27 0 0 509373 xen-dyn -event vif0-q2-tx
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75: 420 0 5 0 xen-dyn -event vif0-q2-rx
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76: 179 0 38 0 xen-dyn -event vif0-q3-tx
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77: 299803 281433 0 0 xen-dyn -event vif0-q3-rx
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Signed-off-by: Xiao Liang <xiliang@redhat.com>
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---
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procinterrupts.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/procinterrupts.c b/procinterrupts.c
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index eb84a1c..ca9533b 100644
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--- a/procinterrupts.c
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+++ b/procinterrupts.c
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@@ -167,6 +167,7 @@ GList* collect_full_irq_list()
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while (!feof(file)) {
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int number;
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+ int is_xen_dyn = 0;
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struct irq_info *info;
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char *c;
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char savedline[1024];
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@@ -187,9 +188,13 @@ GList* collect_full_irq_list()
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strncpy(savedline, line, sizeof(savedline));
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irq_name = strtok_r(savedline, " ", &savedptr);
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+ if (strstr(irq_name, "xen-dyn") != NULL)
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+ is_xen_dyn = 1;
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last_token = strtok_r(NULL, " ", &savedptr);
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while ((p = strtok_r(NULL, " ", &savedptr))) {
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irq_name = last_token;
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+ if (strstr(irq_name, "xen-dyn") != NULL)
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+ is_xen_dyn = 1;
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last_token = p;
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}
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@@ -209,7 +214,7 @@ GList* collect_full_irq_list()
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info = calloc(sizeof(struct irq_info), 1);
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if (info) {
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info->irq = number;
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- if (strstr(irq_name, "xen-dyn-event") != NULL) {
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+ if (strstr(irq_name, "-event") != NULL && is_xen_dyn == 1) {
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info->type = IRQ_TYPE_VIRT_EVENT;
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info->class = IRQ_VIRT_EVENT;
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} else {
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--
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2.17.1
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