Created attachment 1926539 [details]
Fix speed calculation for high speed network interface

Description of problem:

For 10Gb/s network interface, `get_speed_duplex` returns wrong speed
because of overflow.
    
Things get worse for 200Gb/s interface, as `ethtool_cmd.speed_hi`
field was ignored.

Version-Release number of selected component (if applicable):


How reproducible:
100%

Steps to Reproduce:
1.run nicstat to monitor network read and write usage of 10Gb or 200Gb interface
2.
3.

Actual results:
Wrong rUtil and wUtil are reported because of wrong speed returned by function `get_speed_duplex`.

Expected results:


Additional info:
Patch for this issue.
```
diff --git a/nicstat.c b/nicstat.c
index 83ad557..2b52c39 100644
--- a/nicstat.c
+++ b/nicstat.c
@@ -1587,6 +1587,7 @@ get_speed_duplex(nicdata_t *nicp)
 	struct ifreq ifr;
 	struct ethtool_cmd edata;
 	int status;
+	unsigned long long speed;
 
 	if (nicp->flags & NIC_NO_GSET) {
 		if (nicp->speed > 0)
@@ -1609,7 +1610,8 @@ get_speed_duplex(nicdata_t *nicp)
 		get_speed_duplex(nicp);
 		return;
 	}
-	nicp->speed = edata.speed * 1000000;
+	speed = (((unsigned)edata.speed_hi) << 16) + edata.speed;
+	nicp->speed = speed * 1000000;
 	nicp->duplex = edata.duplex;
 }
```