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Commit 991f8f1c authored by Vitaly Kuznetsov's avatar Vitaly Kuznetsov Committed by Greg Kroah-Hartman
Browse files

hyper-v: trace channel events 



Added an additional set of trace points for when channel gets notified
or signals host.

Suggested-by: default avatarStephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 98f31a00

drivers/hv/channel.c

+2 −0
Original line number Diff line number Diff line
@@ -43,6 +43,8 @@ void vmbus_setevent(struct vmbus_channel *channel) 
{

	struct hv_monitor_page *monitorpage;



	trace_vmbus_setevent(channel);



	/*

	 * For channels marked as in "low latency" mode

	 * bypass the monitor page mechanism.

drivers/hv/connection.c

+2 −0
Original line number Diff line number Diff line
@@ -322,6 +322,8 @@ void vmbus_on_event(unsigned long data) 
	struct vmbus_channel *channel = (void *) data;

	unsigned long time_limit = jiffies + 2;



	trace_vmbus_on_event(channel);



	do {

		void (*callback_fn)(void *);

drivers/hv/hv_trace.h

+23 −0
Original line number Diff line number Diff line
@@ -294,6 +294,29 @@ TRACE_EVENT(vmbus_send_tl_connect_request, 
		    )

	);



DECLARE_EVENT_CLASS(vmbus_channel,

	TP_PROTO(const struct vmbus_channel *channel),

	TP_ARGS(channel),

	TP_STRUCT__entry(__field(u32, relid)),

	TP_fast_assign(__entry->relid = channel->offermsg.child_relid),

	TP_printk("relid 0x%x", __entry->relid)

);



DEFINE_EVENT(vmbus_channel, vmbus_chan_sched,

	    TP_PROTO(const struct vmbus_channel *channel),

	    TP_ARGS(channel)

);



DEFINE_EVENT(vmbus_channel, vmbus_setevent,

	    TP_PROTO(const struct vmbus_channel *channel),

	    TP_ARGS(channel)

);



DEFINE_EVENT(vmbus_channel, vmbus_on_event,

	    TP_PROTO(const struct vmbus_channel *channel),

	    TP_ARGS(channel)

);



#undef TRACE_INCLUDE_PATH

#define TRACE_INCLUDE_PATH .

#undef TRACE_INCLUDE_FILE

drivers/hv/vmbus_drv.c

+2 −0
Original line number Diff line number Diff line
@@ -946,6 +946,8 @@ static void vmbus_chan_sched(struct hv_per_cpu_context *hv_cpu) 
			if (channel->rescind)

				continue;



			trace_vmbus_chan_sched(channel);



			++channel->interrupts;



			switch (channel->callback_mode) {