Date: Fri, 4 Jul 2008 14:17:03 +1000 From: "Murray Taylor" <MTaylor@bytecraft.com.au> To: <freebsd-hackers@freebsd.org> Subject: massive interrupt storm Message-ID: <04E232FDCD9FBE43857F7066CAD3C0F15B81D2@svmailmel.bytecraft.internal>
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Hi all, We have just purchased some servers with a view to using them as firewalls within our WAN, and have discovered that they are suject to a massive interrupt storm on IRQ17. systat -v is showing 59000 -> 63000 interrupts continuously on this IRQ, and 90%->98% Interrupt CPU usage =20 The server specs are=20 Model: IBM x3250 M2 IBM MT code: 4190 CPU : Core 2 Duo,=20 Has SAS RAID module fitted to mobo 2 SATA drives in RAID 1 No mobo PS2 ports at all 4 USB port on mobo 2 Broadcom NIC on mobo 1 Gb RAM fitted as 2 512M sticks PCI Express Bus - No cards installed It seem to be related to one of the PCI busses as bge1 doesnt come up in the dmesg lists and that is on (i think) pcib1. Big Note: this storm activity is apparent on 4.11, 6.2 and 7.0 ... kernel is GENERIC in all test cases. The boxen work, just v e r y s l o w l y ... ideas ? Murray Taylor Special Projects Engineer Bytecraft Systems -- "Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction." --Albert Einstein=20 --------------------------------------------------------------- The information transmitted in this e-mail is for the exclusive use of the intended addressee and may contain confidential and/or privileged material. Any review, re-transmission, dissemination or other use of it, or the taking of any action in reliance upon this information by persons and/or entities other than the intended recipient is prohibited. If you received this in error, please inform the sender and/or addressee immediately and delete the material.=20 E-mails may not be secure, may contain computer viruses and may be corrupted in transmission. Please carefully check this e-mail (and any attachment) accordingly. No warranties are given and no liability is accepted for any loss or damage caused by such matters. --------------------------------------------------------------- ### This e-mail message has been scanned for Viruses by Bytecraft ###
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