Drivers: hv: vmbus: Expose per-channel interrupts and events counters (6981fbf3) · Commits · 戴 / test

Documentation/ABI/stable/sysfs-bus-vmbus

+20 −6

Original line number	Diff line number	Diff line
		@@ -61,39 +61,53 @@ Date: September. 2017
		KernelVersion: 4.14
		Contact: Stephen Hemminger <sthemmin@microsoft.com>
		Description: Inbound channel signaling state
		Users: Debuggig tools
		Users: Debugging tools

		What: /sys/bus/vmbus/devices/vmbus_*/channels/relid/latency
		Date: September. 2017
		KernelVersion: 4.14
		Contact: Stephen Hemminger <sthemmin@microsoft.com>
		Description: Channel signaling latency
		Users: Debuggig tools
		Users: Debugging tools

		What: /sys/bus/vmbus/devices/vmbus_*/channels/relid/out_mask
		Date: September. 2017
		KernelVersion: 4.14
		Contact: Stephen Hemminger <sthemmin@microsoft.com>
		Description: Outbound channel signaling state
		Users: Debuggig tools
		Users: Debugging tools

		What: /sys/bus/vmbus/devices/vmbus_*/channels/relid/pending
		Date: September. 2017
		KernelVersion: 4.14
		Contact: Stephen Hemminger <sthemmin@microsoft.com>
		Description: Channel interrupt pending state
		Users: Debuggig tools
		Users: Debugging tools

		What: /sys/bus/vmbus/devices/vmbus_*/channels/relid/read_avail
		Date: September. 2017
		KernelVersion: 4.14
		Contact: Stephen Hemminger <sthemmin@microsoft.com>
		Description: Bytes availabble to read
		Users: Debuggig tools
		Users: Debugging tools

		What: /sys/bus/vmbus/devices/vmbus_*/channels/relid/write_avail
		Date: September. 2017
		KernelVersion: 4.14
		Contact: Stephen Hemminger <sthemmin@microsoft.com>
		Description: Bytes availabble to write
		Users: Debuggig tools
		Users: Debugging tools

		What: /sys/bus/vmbus/devices/vmbus_*/channels/relid/events
		Date: September. 2017
		KernelVersion: 4.14
		Contact: Stephen Hemminger <sthemmin@microsoft.com>
		Description: Number of times we have signaled the host
		Users: Debugging tools

		What: /sys/bus/vmbus/devices/vmbus_*/channels/relid/interrupts
		Date: September. 2017
		KernelVersion: 4.14
		Contact: Stephen Hemminger <sthemmin@microsoft.com>
		Description: Number of times we have taken an interrupt (incoming)
		Users: Debugging tools

drivers/hv/connection.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -409,6 +409,8 @@ void vmbus_set_event(struct vmbus_channel *channel)
		if (!channel->is_dedicated_interrupt)
		vmbus_send_interrupt(child_relid);

		++channel->sig_events;

		hv_do_fast_hypercall8(HVCALL_SIGNAL_EVENT, channel->sig_event);
		}
		EXPORT_SYMBOL_GPL(vmbus_set_event);

drivers/hv/vmbus_drv.c

+16 −0

Original line number	Diff line number	Diff line
		@@ -944,6 +944,8 @@ static void vmbus_chan_sched(struct hv_per_cpu_context *hv_cpu)
		if (channel->rescind)
		continue;

		++channel->interrupts;

		switch (channel->callback_mode) {
		case HV_CALL_ISR:
		vmbus_channel_isr(channel);
		@@ -1237,6 +1239,18 @@ static ssize_t channel_latency_show(const struct vmbus_channel *channel,
		}
		VMBUS_CHAN_ATTR(latency, S_IRUGO, channel_latency_show, NULL);

		static ssize_t channel_interrupts_show(const struct vmbus_channel channel, char buf)
		{
		return sprintf(buf, "%llu\n", channel->interrupts);
		}
		VMBUS_CHAN_ATTR(interrupts, S_IRUGO, channel_interrupts_show, NULL);

		static ssize_t channel_events_show(const struct vmbus_channel channel, char buf)
		{
		return sprintf(buf, "%llu\n", channel->sig_events);
		}
		VMBUS_CHAN_ATTR(events, S_IRUGO, channel_events_show, NULL);

		static struct attribute *vmbus_chan_attrs[] = {
		&chan_attr_out_mask.attr,
		&chan_attr_in_mask.attr,
		@@ -1245,6 +1259,8 @@ static struct attribute *vmbus_chan_attrs[] = {
		&chan_attr_cpu.attr,
		&chan_attr_pending.attr,
		&chan_attr_latency.attr,
		&chan_attr_interrupts.attr,
		&chan_attr_events.attr,
		NULL
		};

include/linux/hyperv.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -719,6 +719,10 @@ struct vmbus_channel {

		struct vmbus_close_msg close_msg;

		/* Statistics */
		u64 interrupts; /* Host to Guest interrupts */
		u64 sig_events; /* Guest to Host events */

		/* Channel callback's invoked in softirq context */
		struct tasklet_struct callback_event;
		void (onchannel_callback)(void context);

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