Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx> writes:
> I added an additional set of trace points for when channel gets notified or signals host.
>
Will add this in v3, thanks!
> diff -urNp linux-msft/drivers/hv/channel.c msft-4.14-rc3/drivers/hv/channel.c
> --- linux-msft/drivers/hv/channel.c 2017-10-03 10:06:54.893209237 -0700
> +++ msft-4.14-rc3/drivers/hv/channel.c 2017-10-03 10:07:35.501665114 -0700
> @@ -55,6 +55,8 @@ void vmbus_setevent(struct vmbus_channel
> {
> struct hv_monitor_page *monitorpage;
>
> + trace_vmbus_setevent(channel);
> +
> /*
> * For channels marked as in "low latency" mode
> * bypass the monitor page mechanism.
> diff -urNp linux-msft/drivers/hv/connection.c msft-4.14-rc3/drivers/hv/connection.c
> --- linux-msft/drivers/hv/connection.c 2017-10-03 10:06:54.893209237 -0700
> +++ msft-4.14-rc3/drivers/hv/connection.c 2017-10-03 10:07:35.501665114 -0700
> @@ -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 *);
>
> diff -urNp linux-msft/drivers/hv/hv_trace.h msft-4.14-rc3/drivers/hv/hv_trace.h
> --- linux-msft/drivers/hv/hv_trace.h 2017-10-03 10:08:06.514014019 -0700
> +++ msft-4.14-rc3/drivers/hv/hv_trace.h 2017-10-03 10:07:35.505665159 -0700
> @@ -294,6 +294,29 @@ TRACE_EVENT(vmbus_send_tl_connect_reques
> )
> );
>
> +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
> diff -urNp linux-msft/drivers/hv/vmbus_drv.c msft-4.14-rc3/drivers/hv/vmbus_drv.c
> --- linux-msft/drivers/hv/vmbus_drv.c 2017-10-03 10:06:54.897209282 -0700
> +++ msft-4.14-rc3/drivers/hv/vmbus_drv.c 2017-10-03 10:07:35.505665159 -0700
> @@ -948,6 +948,7 @@ static void vmbus_chan_sched(struct hv_p
> continue;
>
> ++channel->interrupts_in;
> + trace_vmbus_chan_sched(channel);
>
> switch (channel->callback_mode) {
> case HV_CALL_ISR:
--
Vitaly
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