Hi, I see similar hangs on one of our Supermicro servers. We have a ZFS RAID (mirrored stripped vdevs) and when I use "zfs receive" to receive snapshots the whole system hangs for up to ten or even more minutes at the end.
Kernel: latest (9.2-RC3) Adaptec 6805 RAID-Controller provides disks for ZFS via JBOD /var/log/messages and dmesg do not show anything related to the hangs. I hope this helps to analyze that issue any further. Regards, Nils Pascal Illenseer ------------------------------ < Cut here > ------------------------------ Copyright (c) 1992-2013 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD is a registered trademark of The FreeBSD Foundation. FreeBSD 9.2-RC3 #0 r254795: Sat Aug 24 20:25:04 UTC 2013 r...@bake.isc.freebsd.org:/usr/obj/usr/src/sys/GENERIC amd64 gcc version 4.2.1 20070831 patched [FreeBSD] CPU: AMD Opteron(tm) Processor 6376 (2300.05-MHz K8-class CPU) Origin = "AuthenticAMD" Id = 0x600f20 Family = 0x15 Model = 0x2 Stepping = 0 Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT> Features2=0x3e98320b<SSE3,PCLMULQDQ,MON,SSSE3,FMA,CX16,SSE4.1,SSE4.2,POPCNT,AESNI,XSAVE,OSXSAVE,AVX,F16C> AMD Features=0x2e500800<SYSCALL,NX,MMX+,FFXSR,Page1GB,RDTSCP,LM> AMD Features2=0x1ebbfff<LAHF,CMP,SVM,ExtAPIC,CR8,ABM,SSE4A,MAS,Prefetch,OSVW,IBS,XOP,SKINIT,WDT,LWP,FMA4,<b17>,NodeId,TBM,Topology,<b23>,<b24>> Standard Extended Features=0x8 TSC: P-state invariant, performance statistics real memory = 137438953472 (131072 MB) avail memory = 133006090240 (126844 MB) Event timer "LAPIC" quality 400 ACPI APIC Table: <050713 APIC1654> FreeBSD/SMP: Multiprocessor System Detected: 16 CPUs FreeBSD/SMP: 1 package(s) x 16 core(s) … aacraid0: <Adaptec RAID Controller> mem 0xfd800000-0xfdbfffff,0xfd7bf800-0xfd7bffff,0xfd7bf400-0xfd7bf4ff irq 28 at device 0.0 on pci1 aacraid0: Enable Raw I/O aacraid0: Enable 64-bit array aacraid0: New comm. interface type1 enabled aacraid0: Adaptec 6805, aacraid driver 3.1.1-1 aacraidp0 on aacraid0 aacraidp1 on aacraid0 aacraidp2 on aacraid0 aacraidp3 on aacraid0 ------------------------------ < Cut here > ------------------------------ Am 30.07.2013 um 19:19 schrieb Ewald Jenisch <a...@jenisch.at>: > Hi, > > I'm seeing rather strange behavior on an HP DL585 G5 wrt. disk IO: > > When there's any disk io the machine completely freezes, i.e. no > console input possible, no screen output - complete hang. After some > minutes the box comes back to normal again - but sure enough with the > next disk io it freezes again. > > To give you a typical example: While a "portsnap fetch extract" was > running I did a "sync". Normally this should complete in a matter of > milliseconds to seconds in the worst case - but dig this: > > # date;time sync;date > Tue Jul 30 09:57:38 CEST 2013 > 0.000u 0.311s 9:54.69 0.0% 4+161k 0+1287io 0pf+0w > Tue Jul 30 10:07:38 CEST 2013 > # > > No, this is not a typo - it really took nearly ten minutes (!) for the > sync to complete. In the meantime - every windows, all activity > (console, screen-output etc.) is completely blocked. ('portsnap fetch > extract' was only given as an example here - the lockup occurs > whenever there is disk io like for example tar, etc). > > We're speaking about a machine with decent hardware here, here's an > excerpt from "dmesg": > > ------------------------------ < Cut here > ------------------------------ > > FreeBSD 9.2-BETA2 #0 r253750: Mon Jul 29 11:07:04 CEST 2013 > root@sniff-rz2:/usr/obj/usr/src/sys/GENERIC amd64 > gcc version 4.2.1 20070831 patched [FreeBSD] > CPU: Quad-Core AMD Opteron(tm) Processor 8358 SE (2411.16-MHz K8-class CPU) > Origin = "AuthenticAMD" Id = 0x100f23 Family = 0x10 Model = 0x2 Stepping > = 3 > > Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT> > Features2=0x802009<SSE3,MON,CX16,POPCNT> > AMD Features=0xee400800<SYSCALL,MMX+,FFXSR,Page1GB,RDTSCP,LM,3DNow!+,3DNow!> > AMD Features2=0x7ff<LAHF,CMP,SVM,ExtAPIC,CR8,ABM,SSE4A,MAS,Prefetch,OSVW,IBS> > TSC: P-state invariant > real memory = 137438953472 (131072 MB) > avail memory = 132973432832 (126813 MB) > Event timer "LAPIC" quality 400 > ACPI APIC Table: <HP ProLiant> > FreeBSD/SMP: Multiprocessor System Detected: 16 CPUs > ... > ciss0: <HP Smart Array P400> port 0x3000-0x30ff mem > 0xd9e00000-0xd9efffff,0xd9df0000-0xd9df0fff irq 16 at device 0.0 on pci8 > ciss0: PERFORMANT Transport > ... > da0 at ciss0 bus 0 scbus2 target 0 lun 0 > da0: <COMPAQ RAID 1(1+0) OK> Fixed Direct Access SCSI-5 device > da0: 135.168MB/s transfers > da0: Command Queueing enabled > da0: 139979MB (286677120 512 byte sectors: 255H 32S/T 35132C) > da0: quirks=0x1<NO_SYNC_CACHE> > > ------------------------------ < Cut here > ------------------------------ > > Kernel: Latest kernel as of yesterday (9.2Beta) > > BIOS: is at the latest level (Support pack as of Spring 2013) > installed which updated BIOS, iLO etc. Aside from that I reset BIOS to > default values just to be sure. > > SmartArray P400 - Firmware 7.24 (latest) > > Harddisks: Two 146GB HDs running in Raid1-mode. Already tried > hot-swapping the disks - didn't change anything. > > Needless to say - no error message etc. in neither dmesg nor > /var/log/messages :-( > > To me it looks like this is some sort of timing problem - but where > should I start looking? > > Thanks much in advance for any help, > -ewald >
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