From: Alex Moskalenko <mav@elserv.msk.su> To: hardware@altlinux.ru Subject: [Hardware] DAC960 - " замирание " системы при записи Date: Thu, 4 Aug 2005 10:05:32 +0400 Message-ID: <200508041005.32618.mav@elserv.msk.su> (raw) Здравствуйте! Столкнулся со следующей проблемой. При записи больших объемов данных система полностью замирает на 10-60 секунд. Не работают top, ps, отваливаются соединения samba. При этом успел заметить, что происходит это при активизации процесса bdflush. Ситуацию удается более-менее сгладить командой update -1 96 -5 120, т.е. уменьшая количество одновременно сбрасываемых блоков на диски и уменьшая время возможного присутствия этих блоков в кэше. Полностью проблему это не решает, так как похоже на время операций ввода-вывода с контроллером система блокируется, что очень сильно отражается на обмене с сетью. Кто-нибудь сталкивался с подобной проблемой? Куда можно копать? Железо: #lspci -v 00:00.0 Host bridge: Intel Corp. 82845 845 (Brookdale) Chipset Host Bridge (rev 03) Subsystem: Intel Corp. 82845 845 (Brookdale) Chipset Host Bridge Flags: bus master, fast devsel, latency 0 Memory at d8000000 (32-bit, prefetchable) [size=64M] Capabilities: [e4] #09 [0104] Capabilities: [a0] AGP version 2.0 00:01.0 PCI bridge: Intel Corp. 82845 845 (Brookdale) Chipset AGP Bridge (rev 03) (prog-if 00 [Normal decode]) Flags: bus master, 66Mhz, fast devsel, latency 64 Bus: primary=00, secondary=01, subordinate=01, sec-latency=32 Memory behind bridge: e0000000-e1ffffff Prefetchable memory behind bridge: d0000000-d7ffffff 00:1e.0 PCI bridge: Intel Corp. 82801BA/CA/DB/EB/ER Hub interface to PCI Bridge (rev 12) (prog-if 00 [Normal decode]) Flags: bus master, fast devsel, latency 0 Bus: primary=00, secondary=02, subordinate=02, sec-latency=32 I/O behind bridge: 0000c000-0000cfff Memory behind bridge: de000000-dfffffff Prefetchable memory behind bridge: dc000000-ddffffff 00:1f.0 ISA bridge: Intel Corp. 82801BA ISA Bridge (LPC) (rev 12) Flags: bus master, medium devsel, latency 0 00:1f.1 IDE interface: Intel Corp. 82801BA IDE U100 (rev 12) (prog-if 80 [Master]) Subsystem: Intel Corp.: Unknown device 2442 Flags: bus master, medium devsel, latency 0 I/O ports at f000 [size=16] 00:1f.2 USB Controller: Intel Corp. 82801BA/BAM USB (Hub #1) (rev 12) (prog-if 00 [UHCI]) Subsystem: Intel Corp. 82801BA/BAM USB (Hub #1) Flags: bus master, medium devsel, latency 0, IRQ 19 I/O ports at d000 [size=32] 00:1f.3 SMBus: Intel Corp. 82801BA/BAM SMBus (rev 12) Subsystem: Intel Corp.: Unknown device 2442 Flags: medium devsel, IRQ 17 I/O ports at 5000 [size=16] 00:1f.4 USB Controller: Intel Corp. 82801BA/BAM USB (Hub #2) (rev 12) (prog-if 00 [UHCI]) Subsystem: Intel Corp.: Unknown device 2442 Flags: bus master, medium devsel, latency 0, IRQ 23 I/O ports at d800 [size=32] 00:1f.5 Multimedia audio controller: Intel Corp. 82801BA/BAM AC'97 Audio (rev 12) Subsystem: Unknown device 414c:4710 Flags: bus master, medium devsel, latency 0, IRQ 17 I/O ports at dc00 [size=256] I/O ports at e000 [size=64] 01:00.0 VGA compatible controller: S3 Inc. Savage 4 (rev 04) (prog-if 00 [VGA]) Subsystem: S3 Inc. 86C394-397 Savage4 Flags: bus master, 66Mhz, medium devsel, latency 248, IRQ 16 Memory at e1000000 (32-bit, non-prefetchable) [size=512K] Memory at d0000000 (32-bit, prefetchable) [size=128M] Expansion ROM at <unassigned> [disabled] [size=64K] Capabilities: [dc] Power Management version 1 Capabilities: [80] AGP version 2.0 02:01.0 Ethernet controller: D-Link System Inc Gigabit Ethernet Adapter (rev 11) Subsystem: D-Link System Inc Gigabit Ethernet Adapter Flags: bus master, 66Mhz, medium devsel, latency 32, IRQ 21 Memory at df000000 (32-bit, non-prefetchable) [size=16K] I/O ports at c000 [size=256] Expansion ROM at <unassigned> [disabled] [size=128K] Capabilities: [48] Power Management version 2 Capabilities: [50] Vital Product Data 02:04.0 RAID bus controller: Mylex Corporation AcceleRAID 352/170/160 support Device (rev 02) Subsystem: Mylex Corporation: Unknown device 0052 Flags: bus master, medium devsel, latency 32, IRQ 18 Memory at dc000000 (32-bit, prefetchable) [size=32M] Expansion ROM at <unassigned> [disabled] [size=32K] Capabilities: [80] Power Management version 2 #cat /proc/interrupts CPU0 0: 7100593 IO-APIC-edge timer 1: 2465 IO-APIC-edge keyboard 8: 2 IO-APIC-edge rtc 9: 0 IO-APIC-level acpi 12: 37 IO-APIC-edge PS/2 Mouse 14: 57 IO-APIC-edge ide0 18: 199537 IO-APIC-level Mylex AcceleRAID 170 19: 0 IO-APIC-level usb-uhci 21: 28155158 IO-APIC-level SysKonnect SK-98xx 23: 0 IO-APIC-level usb-uhci NMI: 0 LOC: 7100618 ERR: 0 MIS: 0 #cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 0 model name : Intel(R) Pentium(R) 4 CPU 1300MHz stepping : 7 cpu MHz : 1300.056 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm bogomips : 2595.22 #cat /proc/rd/c0/current_status ***** DAC960 RAID Driver Version 2.4.11 of 11 October 2001 ***** Copyright 1998-2001 by Leonard N. Zubkoff <lnz@dandelion.com> Configuring Mylex AcceleRAID 170 PCI RAID Controller Firmware Version: 7.02-00, Channels: 1, Memory Size: 32MB PCI Bus: 2, Device: 4, Function: 0, I/O Address: Unassigned PCI Address: 0xDC000000 mapped at 0xF8A0C000, IRQ Channel: 18 Controller Queue Depth: 512, Maximum Blocks per Command: 2048 Driver Queue Depth: 511, Scatter/Gather Limit: 128 of 257 Segments Physical Devices: 0:0 Vendor: QUANTUM Model: ATLAS_V_36_WLS Revision: 0230 Wide Synchronous at 160 MB/sec Serial Number: 143109651315 Disk Status: Online, 71688192 blocks 0:1 Vendor: QUANTUM Model: ATLAS_V_36_WLS Revision: 0230 Wide Synchronous at 160 MB/sec Serial Number: 143110652586 Disk Status: Online, 71688192 blocks 0:2 Vendor: QUANTUM Model: ATLAS_V_36_WLS Revision: 0230 Wide Synchronous at 160 MB/sec Serial Number: 143110652703 Disk Status: Online, 71688192 blocks 0:7 Vendor: MYLEX Model: AcceleRAID 170 Revision: 0702 Wide Synchronous at 160 MB/sec Serial Number: Logical Drives: /dev/rd/c0d0: RAID-5, Online, 143376384 blocks Logical Device Initialized, BIOS Geometry: 255/63 Stripe Size: 64KB, Segment Size: 64KB Read Cache Disabled, Write Cache Disabled No Rebuild or Consistency Check in Progress Софт #mount /dev/rd/c0d0p1 on / type ext3 (rw) proc on /proc type proc (rw,gid=19) devpts on /dev/pts type devpts (rw,gid=5,mode=0620) /dev/rd/c0d0p3 on /mnt/shared type xfs (rw) /dev/hdb on /mnt/cdrom type subfs (ro,noexec,nosuid,nodev,fs=cdfss,kudzu) /dev/fd0 on /mnt/floppy type subfs (rw,noexec,nosuid,nodev,sync,fs=floppyfss,kudzu) usbfs on /proc/bus/usb type usbfs (rw) #uname -a Linux bdc.main.elserv.ru 2.4.26-std-up-alt12 #1 Thu May 12 14:53:58 MSD 2005 i686 unknown unknown GNU/Linux #cat /etc/altlinux-release ALT Linux Master 2.4 (Citron) Запись и чтение тестируются на разделе /dev/rd/c0d0p3 Включение на контроллере политики кэша Write Back (Становится Write Cache Enabled) проблемы не решает. -- WBR, Alex Moskalenko
next reply other threads:[~2005-08-04 6:05 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2005-08-04 6:05 Alex Moskalenko [this message] 2005-08-04 10:32 ` Alex Moskalenko 2005-08-05 12:11 ` [Hardware] " Konstantin A. Lepikhov 2005-08-05 17:09 ` [Hardware] " Michael Shigorin
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