From: Kimberly Brown <kimbrownkd@xxxxxxxxx> Sent: Wednesday, January 16, 2019 8:38 PM > > Counter values for per-channel interrupts and ring buffer full > conditions are useful for investigating performance. > > Expose counters in sysfs for 2 types of guest to host interrupts: > 1) Interrupts caused by the channel's outbound ring buffer transitioning > from empty to not empty > 2) Interrupts caused by the channel's inbound ring buffer transitioning > from full to not full while a packet is waiting for enough buffer space to > become available > > Expose 2 counters in sysfs for the number of times that write operations > encountered a full outbound ring buffer: > 1) The total number of write operations that encountered a full > condition > 2) The number of write operations that were the first to encounter a > full condition > > I tested this patch by confirming that the sysfs files were created and > observing the counter values. The values seemed to increase by a > reasonable amount when the Hyper-v related drivers were in use. > > Signed-off-by: Kimberly Brown <kimbrownkd@xxxxxxxxx> > --- > Changes in v3: > - Used the outbound ring buffer spinlock to protect the the full > condition counters in set_channel_pending_send_size() > - Corrected the KernelVersion values for the new entries in > Documentation/ABI/stable/sysfs-bus-vmbus > > Changes in v2: > - Added mailing lists to the cc list > - Removed the host to guest interrupt counters proposed in v1 because > they were not accurate > - Added full condition counters for the channel's outbound ring buffer > > Documentation/ABI/stable/sysfs-bus-vmbus | 33 ++++++++++++++++++++ > drivers/hv/ring_buffer.c | 14 ++++++++- > drivers/hv/vmbus_drv.c | 32 ++++++++++++++++++++ > include/linux/hyperv.h | 38 ++++++++++++++++++++++++ > 4 files changed, 116 insertions(+), 1 deletion(-) > Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx> _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
