On 25 Oct 2019, at 15:56, Eelco Chaudron wrote:
When the dpdk vhost library executes an eventfd_write() call,
i.e. waking up the guest, a new callback will be called.
This patch adds the callback to count the number of
interrupts sent to the VM to track the number of times
interrupts where generated.
This might be of interest to find out system-calls were
called in the DPDK fast path.
The coverage counter is called "dpdk_vhost_irqs" and can be
read with:
$ ovs-appctl coverage/show | grep dpdk_vhost_irqs
dpdk_vhost_irqs 275880.6/sec 129962.683/sec
6561.7250/sec total: 23684319
$ ovs-appctl coverage/read-counter dpdk_vhost_irqs
23684319
Signed-off-by: Eelco Chaudron <[email protected]>
Any comments on this patchset?
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