IRQ31 and IRQ32 on HPDL585 running FreeBSD 7.0 are consuming HIGH CPU usage

Won De Erick won.derick at
Thu Nov 13 00:21:25 PST 2008

Noted on this, I will update you through this thread.

However is there any possibility of the following:

> I don't know if there's a way to split the interrupt request for each bce's Rx and Tx,
> which means a total of four IRQs, and eventually four cores (or 4 CPUs)
> for the transactions. With this way, the IDLE processors would be utilized.

What I mean here is, for the two interfaces:

one IRQ for bce0 Rx
one IRQ for bce0 Tx
one IRQ for bce1 Rx
one IRQ for bce1 Tx



From: Jeremy Chadwick <koitsu at>
To: Won De Erick <won.derick at>
Cc: freebsd-hardware at
Sent: Thursday, November 13, 2008 3:46:02 PM
Subject: Re: IRQ31 and IRQ32 on HPDL585 running FreeBSD 7.0 are consuming HIGH CPU usage

On Wed, Nov 12, 2008 at 11:38:15PM -0800, Won De Erick wrote:
> I am conducting a CPU utilization testing with my box(HP DL 585 running FreeBSD 7.0), and come up with the results below:
> 52 root        1 -68    -     0K    16K CPU11  b 123:53 100.00% irq32: bce1
> 51 root        1 -68    -     0K    16K CPU10  a 119:28 89.06% irq31: bce0
> irq31 and irq32 are consuming high CPU usage, which i think the cause of hard reset.

There was a ***major*** bce(4) cleanup that just happened.  Your 7.0 box
will not have these changes.  Please upgrade your box to RELENG_7
(a.k.a. 7.1-PRERELEASE), csup'd recently (today preferably), and try
your tests again:

| Jeremy Chadwick                                jdc at |
| Parodius Networking             |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |

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