mlx5 interrupts
Konstantin Belousov
kostikbel at gmail.com
Mon Jul 20 10:43:47 UTC 2020
On Sun, Jul 19, 2020 at 07:12:07PM +0300, Slawa Olhovchenkov wrote:
> Can anybody explain what purpose of unnamed interrupts of Mellanox
> ConnectX-5 cards?
>
> I am see 19 interrupts per card. I am mean last 16 is RX queue.
It is more correct to describe them as completion queue interrupts, they
serve both rx and tx workqueues.
> What about first 3?
One is for firmware memory requests notifications for UMA.
Two others are firmware command completion and async events (like PHY
module events or hw state notifications).
> Also I am see very high rate for irq287/irq306 -- is this good?
You did not demostrated what you mean by 'very high rate'.
20 req/sec does not count as 'high', and this is the highest I see
in your message.
>
> # vmstat -i | grep -e ^int -e mlx
> interrupt total rate
> irq286: mlx5_core0 1 0
> irq287: mlx5_core0 5135992 20
> irq288: mlx5_core0 1 0
> irq289: mlx5_core0 76408 0
> irq290: mlx5_core0 43054 0
> irq291: mlx5_core0 93826 0
> irq292: mlx5_core0 39457 0
> irq293: mlx5_core0 36141 0
> irq294: mlx5_core0 65526 0
> irq295: mlx5_core0 53399 0
> irq296: mlx5_core0 120885 0
> irq297: mlx5_core0 140690 1
> irq298: mlx5_core0 193578 1
> irq299: mlx5_core0 178332 1
> irq300: mlx5_core0 75334 0
> irq301: mlx5_core0 207118 1
> irq302: mlx5_core0 108803 0
> irq303: mlx5_core0 24356 0
> irq304: mlx5_core0 26713 0
> irq305: mlx5_core1 1 0
> irq306: mlx5_core1 5136296 20
> irq307: mlx5_core1 1 0
> irq308: mlx5_core1 3634544 14
> irq309: mlx5_core1 22860 0
> irq310: mlx5_core1 564441 2
> irq311: mlx5_core1 30503 0
> irq312: mlx5_core1 115549 0
> irq313: mlx5_core1 49815 0
> irq314: mlx5_core1 10272 0
> irq315: mlx5_core1 85875 0
> irq316: mlx5_core1 134251 1
> irq317: mlx5_core1 25151 0
> irq318: mlx5_core1 73376 0
> irq319: mlx5_core1 5879 0
> irq320: mlx5_core1 39515 0
> irq321: mlx5_core1 5390 0
> irq322: mlx5_core1 22726 0
> irq323: mlx5_core1 60408 0
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