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Date:      Thu, 9 Jun 2005 14:23:37 +0200
From:      Emanuel Strobl <Emanuel.strobl@gmx.net>
To:        freebsd-current@freebsd.org
Subject:   lapic@2k interrukts eating CPU cycles
Message-ID:  <200506091423.39940@harrymail>

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Hello,

I recognized that doing a "make clean" in a simple ports takes minutes to 
finish, so I saw that "systat -vm" shows me about 80% system usage during 
that. But even if it's finished lapic keeps generating 2000 interrupts/sec 
and consuming 25% CPU usage when the machine is doning nothing.
Any hints what I could do? I have never seen lapic before, I just did a 
fresh 6-snapshot (june) install and upgraded to yesterdays -current.
Please find attached my kernel conf, although this time I use ULE the 
sluggish "make clean" behaviour was also with 4.2BSD (but I haven't looked 
after the CPU usage)

Thanks,

-Harry

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#2005/06/05
########################################
## Kernel for D815UFVW ##
########################################
## DEBUGS!
options         KDB                     # Enable kernel debugger support.
#options                KDB_TRACE
#options                KDB_UNATTENDED
options         DDB                     # Support DDB.
options         GDB                     # Support remote GDB.
options         INVARIANTS              # Enable calls of extra sanity checking
options         INVARIANT_SUPPORT       # Extra sanity checks of internal structures, required by INVARIANTS
options         WITNESS                 # Enable checks to detect deadlocks and cycles
options         WITNESS_SKIPSPIN        # Don't run witness on spinlocks for speed
options 	KTRACE			# ktrace(1) support
makeoptions	DEBUG=-g		# Build kernel with gdb(1) debug symbols

machine		i386
cpu		I686_CPU
options         PQ_CACHESIZE=256        # color for 512k/16k cache
ident		CALE


options 	SCHED_ULE		# ULE scheduler
#options 	SCHED_4BSD		# 4BSD scheduler
options 	PREEMPTION		# Enable kernel thread preemption
options 	INET			# InterNETworking
options 	INET6			# IPv6 communications protocols
options 	FFS			# Berkeley Fast Filesystem
options 	UFS_ACL			# Support for access control lists
options 	UFS_DIRHASH		# Improve performance on big directories
options 	SOFTUPDATES		# Enable FFS soft updates support
#options         UFS_EXTATTR
#options         UFS_EXTATTR_AUTOSTART
#options         QUOTA                   #enable disk quotas
#options         SUIDDIR
options 	MD_ROOT			# MD is a potential root device
options 	NFSCLIENT		# Network Filesystem Client
options 	NFSSERVER		# Network Filesystem Server
options 	NFS_ROOT		# NFS usable as /, requires NFSCLIENT
options         UDF
options 	MSDOSFS			# MSDOS Filesystem
options 	CD9660			# ISO 9660 Filesystem
options 	PROCFS			# Process filesystem (requires PSEUDOFS)
options 	PSEUDOFS		# Pseudo-filesystem framework
options 	GEOM_GPT		# GUID Partition Tables.
options         GEOM_BDE
options         GEOM_GATE
options         GEOM_LABEL
options         GEOM_MIRROR
options         GEOM_STRIPE
options 	COMPAT_43		# Compatible with BSD 4.3 [KEEP THIS!]
#options 	COMPAT_FREEBSD4		# Compatible with FreeBSD4
options 	SCSI_DELAY=5000		# Delay (in ms) before probing SCSI
options 	SYSVSHM			# SYSV-style shared memory
options 	SYSVMSG			# SYSV-style message queues
options 	SYSVSEM			# SYSV-style semaphores
options 	_KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions
options 	KBD_INSTALL_CDEV	# install a CDEV entry in /dev
options 	AHC_REG_PRETTY_PRINT	# Print register bitfields in debug
					# output.  Adds ~128k to driver.
options 	AHD_REG_PRETTY_PRINT	# Print register bitfields in debug
					# output.  Adds ~215k to driver.
options 	ADAPTIVE_GIANT		# Giant mutex is adaptive.
#options         TCP_DROP_SYNFIN
#options         ZERO_COPY_SOCKETS
options         DEVICE_POLLING

# Bus support.  Do not remove isa, even if you have no isa slots
device          acpi
device		isa
device		pci
device		apic			# I/O APIC
device		agp		# support several AGP chipsets
device		npx


# Floppy drives
device		fdc

# ATA and ATAPI devices
device		ata
device		atadisk		# ATA disk drives
device		atapicd		# ATAPI CDROM drives
options 	ATA_STATIC_ID	# Static device numbering

# SCSI peripherals
device		scbus		# SCSI bus (required for SCSI)
device		da		# Direct Access (disks)
device		cd		# CD
device		pass		# Passthrough device (direct SCSI access)

# atkbdc0 controls both the keyboard and the PS/2 mouse
device		atkbdc		# AT keyboard controller
device		atkbd		# AT keyboard
device		psm		# PS/2 mouse
options         ATKBD_DFLT_KEYMAP
makeoptions     ATKBD_DFLT_KEYMAP=german.iso

device		vga		# VGA video card driver
options         VESA
device          splash          # Splash screen and screen saver support
device          sc
options         MAXCONS=12
options         SC_DISABLE_REBOOT
options         SC_PIXEL_MODE
options         SC_HISTORY_SIZE=1000
options         SC_DFLT_FONT
makeoptions     SC_DFLT_FONT=iso15


# syscons is the default console driver, resembling an SCO console
device		sc


device		pmtimer

# Serial (COM) ports
device		sio		# 8250, 16[45]50 based serial ports

# Parallel port
device		ppc
device		ppbus		# Parallel port bus (required)
device		lpt		# Printer
device		ppi		# Parallel port interface device
device		vpo		# Requires scbus and da

# PCI Ethernet NICs.
device		em		# Intel PRO/1000 adapter Gigabit Ethernet Card

# PCI Ethernet NICs that use the common MII bus controller code.
# NOTE: Be sure to keep the 'device miibus' line in order to use these NICs!
device		miibus		# MII bus support
device		fxp		# Intel EtherExpress PRO/100B (82557, 82558)

# Pseudo devices.
device		loop		# Network loopback
device		mem		# Memory and kernel memory devices
device		io		# I/O device
device		random		# Entropy device
device		ether		# Ethernet support
device		pty		# Pseudo-ttys (telnet etc)
device		md		# Memory "disks"
device		gif		# IPv6 and IPv4 tunneling
device		faith		# IPv6-to-IPv4 relaying (translation)
device		bpf		# Berkeley packet filter

# USB support
device		uhci		# UHCI PCI->USB interface
device		ohci		# OHCI PCI->USB interface
device		ehci		# EHCI PCI->USB interface (USB 2.0)
device		usb		# USB Bus (required)
device		ugen		# Generic
device		uhid		# "Human Interface Devices"
device		ukbd		# Keyboard
options         UKBD_DFLT_KEYMAP
makeoptions     UKBD_DFLT_KEYMAP=german.iso
device		ulpt		# Printer
device		umass		# Disks/Mass storage - Requires scbus and da
device		ums		# Mouse
device		uscanner	# Scanners
device          uplcom
device          ucom

# FireWire support
device		firewire	# FireWire bus code
device		sbp		# SCSI over FireWire (Requires scbus and da)
device		fwe		# Ethernet over FireWire (non-standard!)

device          smbus           # Bus support, required for smb below.
device          smb

device          sound
device          snd_ich
device          ichsmb
device          atapicam

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