2.6.6-rc1-mm1 (and earlier): pdflush taking 100% cpu time (profile, .config etc. provided)

From: Jurriaan
Date: Tue Apr 20 2004 - 17:47:07 EST

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at times, pdflush is taking over my system:

kernel 2.6.6-rc1-mm1

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
31276 jurriaan 25 0 76772 59m 8764 R 98.7 2.0 776:39.05 mencoder
3479 root 25 0 0 0 0 R 96.7 0.0 134:29.90 pdflush
1 root 16 0 1520 516 1368 S 0.0 0.0 0:10.50 init

procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
2 0 3064 7428 71536 2696036 0 0 94 154 201 196 53 5 41 1
2 0 3064 7108 71556 2696424 0 0 128 303 1146 182 50 50 0 0
2 0 3064 6540 71556 2697036 0 0 192 238 1129 155 50 50 0 0
2 0 3064 6284 71556 2697512 0 0 128 228 1127 278 50 50 0 0
2 0 3064 7692 71564 2696076 0 0 192 266 1134 161 50 50 0 0
2 0 3064 7108 71564 2696688 0 0 192 302 1140 203 50 50 0 0
2 0 3064 6660 71568 2697092 0 0 128 232 1128 145 50 50 0 0
2 0 3064 6276 71588 2697616 0 0 128 309 1141 178 50 50 0 0
2 0 3064 7108 71588 2696732 0 0 192 290 1139 169 50 50 0 0
2 0 3064 6596 71600 2697332 0 0 192 260 1133 165 50 50 0 0

output from
#!/bin/sh
readprofile -r
readprofile -M10
sleep 30
readprofile -n -v -m /proc/kallsyms | sort +0.50 -n | tail -20

c0170978 __iget 172 2.1235
c0178af1 writeback_acquire 220 8.8000
c0178b18 writeback_release 223 4.7447
c0142757 __pagevec_release 237 4.3889
c0172151 wake_up_inode 270 4.2857
c02909b0 atomic_dec_and_lock 271 2.3362
c0339333 ide_intr 308 0.6498
c013ec60 mapping_tagged 376 3.5140
c0178224 sync_sb_inodes 393 0.5406
c0177f49 __sync_single_inode 469 0.9214
c0103029 default_idle 525 10.7143
c0142aff pagevec_lookup_tag 587 9.7833
c0142432 lru_add_drain 689 6.2072
c0138943 wait_on_page_bit 1112 5.2701
c0138910 page_waitqueue 9518 186.6275
c0142579 release_pages 23597 49.3661
c0138a16 unlock_page 23666 281.7381
c013e945 clear_page_dirty_for_io 24791 255.5773
c01797c5 mpage_writepages 30701 40.0274
c0138ec9 find_get_pages_tag 181934 1166.2436

.config:
CONFIG_X86=y
CONFIG_MMU=y
CONFIG_UID16=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_EXPERIMENTAL=y
CONFIG_BROKEN=y
CONFIG_BROKEN_ON_SMP=y
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSCTL=y
CONFIG_LOG_BUF_SHIFT=16
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_KALLSYMS=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_AS=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
CONFIG_OBSOLETE_MODPARM=y
CONFIG_KMOD=y
CONFIG_STOP_MACHINE=y
CONFIG_X86_PC=y
CONFIG_MPENTIUM4=y
CONFIG_X86_CMPXCHG=y
CONFIG_X86_XADD=y
CONFIG_X86_L1_CACHE_SHIFT=7
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_GOOD_APIC=y
CONFIG_X86_INTEL_USERCOPY=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_HPET_TIMER=y
CONFIG_HPET_EMULATE_RTC=y
CONFIG_SMP=y
CONFIG_NR_CPUS=2
CONFIG_SCHED_SMT=y
CONFIG_PREEMPT=y
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_TSC=y
CONFIG_X86_MCE=y
CONFIG_X86_MCE_NONFATAL=y
CONFIG_X86_MCE_P4THERMAL=y
CONFIG_MICROCODE=y
CONFIG_X86_MSR=y
CONFIG_X86_CPUID=y
CONFIG_HIGHMEM4G=y
CONFIG_HIGHMEM=y
CONFIG_HIGHPTE=y
CONFIG_MTRR=y
CONFIG_HAVE_DEC_LOCK=y
CONFIG_PM=y
CONFIG_ACPI=y
CONFIG_ACPI_BOOT=y
CONFIG_ACPI_INTERPRETER=y
CONFIG_ACPI_SLEEP=y
CONFIG_ACPI_SLEEP_PROC_FS=y
CONFIG_ACPI_AC=y
CONFIG_ACPI_BUTTON=y
CONFIG_ACPI_FAN=y
CONFIG_ACPI_PROCESSOR=y
CONFIG_ACPI_THERMAL=y
CONFIG_ACPI_DEBUG=y
CONFIG_ACPI_BUS=y
CONFIG_ACPI_EC=y
CONFIG_ACPI_POWER=y
CONFIG_ACPI_PCI=y
CONFIG_ACPI_SYSTEM=y
CONFIG_PCI=y
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
CONFIG_PCI_NAMES=y
CONFIG_ISA=y
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_AOUT=y
CONFIG_BINFMT_MISC=y
CONFIG_PARPORT=y
CONFIG_PARPORT_PC=y
CONFIG_PARPORT_PC_CML1=y
CONFIG_PARPORT_1284=y
CONFIG_BLK_DEV_FD=y
CONFIG_BLK_DEV_LOOP=y
CONFIG_IDE=y
CONFIG_BLK_DEV_IDE=y
CONFIG_BLK_DEV_IDEDISK=y
CONFIG_BLK_DEV_IDECD=y
CONFIG_BLK_DEV_IDESCSI=y
CONFIG_IDE_GENERIC=y
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_IDEPCI_SHARE_IRQ=y
CONFIG_BLK_DEV_IDEDMA_PCI=y
CONFIG_IDEDMA_PCI_AUTO=y
CONFIG_BLK_DEV_ADMA=y
CONFIG_BLK_DEV_AMD74XX=y
CONFIG_BLK_DEV_HPT366=y
CONFIG_BLK_DEV_PIIX=y
CONFIG_BLK_DEV_PDC202XX_OLD=y
CONFIG_BLK_DEV_VIA82CXXX=y
CONFIG_BLK_DEV_IDEDMA=y
CONFIG_IDEDMA_AUTO=y
CONFIG_SCSI=y
CONFIG_SCSI_PROC_FS=y
CONFIG_BLK_DEV_SD=y
CONFIG_CHR_DEV_ST=y
CONFIG_BLK_DEV_SR=y
CONFIG_CHR_DEV_SG=y
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_REPORT_LUNS=y
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_SPI_ATTRS=y
CONFIG_SCSI_SYM53C8XX_2=y
CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE=1
CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS=16
CONFIG_SCSI_SYM53C8XX_MAX_TAGS=64
CONFIG_SCSI_QLA2XXX=y
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
CONFIG_MD_LINEAR=y
CONFIG_MD_RAID0=y
CONFIG_MD_RAID1=y
CONFIG_MD_RAID5=y
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_SYN_COOKIES=y
CONFIG_NETDEVICES=y
CONFIG_DUMMY=y
CONFIG_NET_ETHERNET=y
CONFIG_MII=y
CONFIG_NET_TULIP=y
CONFIG_TULIP=y
CONFIG_TULIP_MWI=y
CONFIG_TULIP_MMIO=y
CONFIG_NET_PCI=y
CONFIG_8139TOO=y
CONFIG_8139_RXBUF_IDX=2
CONFIG_TIGON3=m
CONFIG_INPUT=y
CONFIG_INPUT_MOUSEDEV=y
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
CONFIG_SOUND_GAMEPORT=y
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=y
CONFIG_INPUT_KEYBOARD=y
CONFIG_KEYBOARD_ATKBD=y
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=y
CONFIG_INPUT_MISC=y
CONFIG_INPUT_PCSPKR=y
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_CORE=y
CONFIG_UNIX98_PTYS=y
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=256
CONFIG_PRINTER=y
CONFIG_WATCHDOG=y
CONFIG_SOFT_WATCHDOG=y
CONFIG_HW_RANDOM=y
CONFIG_RTC=y
CONFIG_AGP=y
CONFIG_AGP_INTEL=y
CONFIG_DRM=y
CONFIG_DRM_RADEON=y
CONFIG_DRM_MGA=y
CONFIG_HANGCHECK_TIMER=y
CONFIG_I2C=y
CONFIG_I2C_CHARDEV=m
CONFIG_I2C_ALGOBIT=y
CONFIG_I2C_ISA=m
CONFIG_I2C_VIAPRO=m
CONFIG_I2C_SENSOR=m
CONFIG_SENSORS_VIA686A=m
CONFIG_SENSORS_W83781D=m
CONFIG_SENSORS_EEPROM=m
CONFIG_FB=y
CONFIG_VIDEO_SELECT=y
CONFIG_FB_MATROX=y
CONFIG_FB_MATROX_G450=y
CONFIG_FB_MATROX_G100=y
CONFIG_FB_RADEON=y
CONFIG_FB_RADEON_I2C=y
CONFIG_FB_RADEON_DEBUG=y
CONFIG_FB_3DFX=y
CONFIG_VGA_CONSOLE=y
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_PCI_CONSOLE=y
CONFIG_FONTS=y
CONFIG_FONT_SUN12x22=y
CONFIG_LOGO=y
CONFIG_LOGO_LINUX_MONO=y
CONFIG_LOGO_LINUX_VGA16=y
CONFIG_LOGO_LINUX_CLUT224=y
CONFIG_SOUND=y
CONFIG_SND=y
CONFIG_SND_TIMER=y
CONFIG_SND_PCM=y
CONFIG_SND_HWDEP=y
CONFIG_SND_RAWMIDI=y
CONFIG_SND_SEQUENCER=y
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=y
CONFIG_SND_PCM_OSS=y
CONFIG_SND_SEQUENCER_OSS=y
CONFIG_SND_RTCTIMER=y
CONFIG_SND_MPU401_UART=y
CONFIG_SND_OPL3_LIB=y
CONFIG_SND_AC97_CODEC=y
CONFIG_SND_EMU10K1=y
CONFIG_SND_CMIPCI=y
CONFIG_SND_INTEL8X0=y
CONFIG_SND_VIA82XX=y
CONFIG_USB=y
CONFIG_USB_DEVICEFS=y
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_UHCI_HCD=y
CONFIG_USB_PRINTER=y
CONFIG_USB_HID=y
CONFIG_USB_HIDINPUT=y
CONFIG_EXT2_FS=y
CONFIG_EXT3_FS=y
CONFIG_EXT3_FS_XATTR=y
CONFIG_JBD=y
CONFIG_FS_MBCACHE=y
CONFIG_REISERFS_FS=y
CONFIG_XFS_FS=y
CONFIG_ISO9660_FS=y
CONFIG_JOLIET=y
CONFIG_UDF_FS=y
CONFIG_FAT_FS=y
CONFIG_VFAT_FS=y
CONFIG_NTFS_FS=y
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
CONFIG_RAMFS=y
CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_SUNRPC=y
CONFIG_MSDOS_PARTITION=y
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=y
CONFIG_NLS_ISO8859_1=y
CONFIG_DEBUG_KERNEL=y
CONFIG_EARLY_PRINTK=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_FRAME_POINTER=y
CONFIG_4KSTACKS=y
CONFIG_SCHEDSTATS=y
CONFIG_X86_FIND_SMP_CONFIG=y
CONFIG_X86_MPPARSE=y
CONFIG_CRC32=y
CONFIG_X86_SMP=y
CONFIG_X86_HT=y
CONFIG_X86_BIOS_REBOOT=y
CONFIG_X86_TRAMPOLINE=y
CONFIG_X86_STD_RESOURCES=y
CONFIG_PC=y

/proc/sys/vm/block_dump:0
/proc/sys/vm/dirty_background_ratio:10
/proc/sys/vm/dirty_expire_centisecs:3000
/proc/sys/vm/dirty_ratio:40
/proc/sys/vm/dirty_writeback_centisecs:500
/proc/sys/vm/laptop_mode:0
/proc/sys/vm/lower_zone_protection:0
/proc/sys/vm/max_map_count:65536
/proc/sys/vm/min_free_kbytes:957
/proc/sys/vm/nr_pdflush_threads:2
/proc/sys/vm/overcommit_memory:0
/proc/sys/vm/overcommit_ratio:50
/proc/sys/vm/page-cluster:3
/proc/sys/vm/swappiness:60

MemTotal: 3107928 kB
MemFree: 6540 kB
Buffers: 72764 kB
Cached: 2696996 kB
SwapCached: 1240 kB
Active: 342292 kB
Inactive: 2625092 kB
HighTotal: 2228160 kB
HighFree: 1088 kB
LowTotal: 879768 kB
LowFree: 5452 kB
SwapTotal: 4016232 kB
SwapFree: 4013180 kB
Dirty: 11868 kB
Writeback: 0 kB
Mapped: 212944 kB
Slab: 107076 kB
Committed_AS: 236832 kB
PageTables: 1252 kB
VmallocTotal: 114680 kB
VmallocUsed: 27256 kB
VmallocChunk: 87420 kB

Any ideas? I've seen this in earlier kernels, but this is the first time
I've been able to profile it. Usually, when I leave the system like this
for the night, pdlush has quieted down by morning. That does hamper the
encoding speed, however.

Thanks,
Jurriaan
--
He was back, and they could like it or lump it.
Simon R Green - Blue Moon Rising
Debian (Unstable) GNU/Linux 2.6.6-rc1-mm1 2x6062 bogomips 2.53 2.32
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Next message: Matt Mackall: "Re: [Ext2-devel] Re: [RFC] extents,delayed allocation,mballoc for ext3"
Previous message: Kim Holviala: "Re: /dev/psaux-Interface"
Next in thread: Andrew Morton: "Re: 2.6.6-rc1-mm1 (and earlier): pdflush taking 100% cpu time(profile, .config etc. provided)"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]