examples/ioat: add signal-triggered device dump

Enable dumping device info via the signal handler. With this change, when a
SIGUSR1 is issued, the application will print a dump of all devices being
used by the application.

Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
Reviewed-by: Conor Walsh <conor.walsh@intel.com>

diff --git a/examples/ioat/ioatfwd.c b/examples/ioat/ioatfwd.c
index 995ba7b..e8a3f2f 100644 (file)
--- a/examples/ioat/ioatfwd.c
+++ b/examples/ioat/ioatfwd.c
@@ -1004,6 +1004,20 @@ port_init(uint16_t portid, struct rte_mempool *mbuf_pool, uint16_t nb_queues)
        cfg.ports[cfg.nb_ports++].nb_queues = nb_queues;
 }
 
+/* Get a device dump for each device being used by the application */
+static void
+rawdev_dump(void)
+{
+       uint32_t i, j;
+
+       if (copy_mode != COPY_MODE_IOAT_NUM)
+               return;
+
+       for (i = 0; i < cfg.nb_ports; i++)
+               for (j = 0; j < cfg.ports[i].nb_queues; j++)
+                       rte_rawdev_dump(cfg.ports[i].ioat_ids[j], stdout);
+}
+
 static void
 signal_handler(int signum)
 {
@@ -1011,6 +1025,8 @@ signal_handler(int signum)
                printf("\n\nSignal %d received, preparing to exit...\n",
                        signum);
                force_quit = true;
+       } else if (signum == SIGUSR1) {
+               rawdev_dump();
        }
 }
 
@@ -1034,6 +1050,7 @@ main(int argc, char **argv)
        force_quit = false;
        signal(SIGINT, signal_handler);
        signal(SIGTERM, signal_handler);
+       signal(SIGUSR1, signal_handler);
 
        nb_ports = rte_eth_dev_count_avail();
        if (nb_ports == 0)