7.1-PRERELEASE: arcmsr write performance problem

[Paul MacKenzie]

>
> I would also try disabling polling.  Is you scheduler ULE or BSD? For
> an 8 core box, it should be ULE
>
>         ---Mike

Hi Mike,

Thanks I will try this now as I have not tried this yet.

Here is the current custom kernel and it is using ULE:

cpu             HAMMER
ident           MYCOMPUTER
makeoptions     DEBUG=-g                # Build kernel with gdb(1) debug
symbols
options         SCHED_ULE               # ULE scheduler
options         PREEMPTION              # Enable kernel thread preemption
options         INET                    # InterNETworking
options         INET6                   # IPv6 communications protocols
options         SCTP                    # Stream Control Transmission
Protocol
options         FFS                     # Berkeley Fast Filesystem
options         SOFTUPDATES             # Enable FFS soft updates support
options         UFS_ACL                 # Support for access control lists
options         UFS_DIRHASH             # Improve performance on big
directories
options         UFS_GJOURNAL            # Enable gjournal-based UFS
journaling
options         MD_ROOT                 # MD is a potential root device
options         CD9660                  # ISO 9660 Filesystem
options         PROCFS                  # Process filesystem (requires
PSEUDOFS)
options         PSEUDOFS                # Pseudo-filesystem framework
options         GEOM_PART_GPT           # GUID Partition Tables.
options         GEOM_LABEL              # Provides labelization
options         COMPAT_43TTY            # BSD 4.3 TTY compat [KEEP THIS!]
options         COMPAT_IA32             # Compatible with i386 binaries
options         COMPAT_FREEBSD4         # Compatible with FreeBSD4
options         COMPAT_FREEBSD5         # Compatible with FreeBSD5
options         COMPAT_FREEBSD6         # Compatible with FreeBSD6
options         SCSI_DELAY=5000         # Delay (in ms) before probing SCSI
options         KTRACE                  # ktrace(1) support
options         STACK                   # stack(9) support
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         ADAPTIVE_GIANT          # Giant mutex is adaptive.
options         STOP_NMI                # Stop CPUS using NMI instead of IPI
options         AUDIT                   # Security event auditing
options         SMP                     # Symmetric MultiProcessor Kernel
options         IPFIREWALL              # Ip Firewall
options         IPFIREWALL_VERBOSE      # Verbose
options         IPFIREWALL_VERBOSE_LIMIT=5000    # limit verbosity
options         QUOTA                   # Disk Quota
options         DEVICE_POLLING
device          cpufreq
device          acpi
device          pci
device          fdc
device          ata
device          atadisk         # ATA disk drives
device          ataraid         # ATA RAID drives
device          atapicd         # ATAPI CDROM drives
device          atapifd         # ATAPI floppy drives
device          atapist         # ATAPI tape drives
options         ATA_STATIC_ID   # Static device numbering
device          scbus           # SCSI bus (required for SCSI)
device          ch              # SCSI media changers
device          da              # Direct Access (disks)
device          sa              # Sequential Access (tape etc)
device          cd              # CD
device          pass            # Passthrough device (direct SCSI access)
device          ses             # SCSI Environmental Services (and SAF-TE)
device          arcmsr          # Areca SATA II RAID
device          atkbdc          # AT keyboard controller
device          atkbd           # AT keyboard
device          psm             # PS/2 mouse
device          kbdmux          # keyboard multiplexer
device          vga             # VGA video card driver
device          splash          # Splash screen and screen saver support
device          sc
device          agp             # support several AGP chipsets
device          sio             # 8250, 16[45]50 based serial ports
device          uart            # Generic UART driver
device          ppc
device          ppbus           # Parallel port bus (required)
device          lpt             # Printer
device          plip            # TCP/IP over parallel
device          ppi             # Parallel port interface device
device          em              # Intel PRO/1000 adapter Gigabit
Ethernet Card
device          miibus          # MII bus support
device          loop            # Network loopback
device          random          # Entropy device
device          ether           # Ethernet support
device          sl              # Kernel SLIP
device          ppp             # Kernel PPP
device          tun             # Packet tunnel.
device          pty             # Pseudo-ttys (telnet etc)
device          md              # Memory "disks"
device          gif             # IPv6 and IPv4 tunneling
device          faith           # IPv6-to-IPv4 relaying (translation)
device          firmware        # firmware assist module
device          lagg            # lagg interface for shared multi homed
network connection
device          bpf             # Berkeley packet filter
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
device          umass           # Disks/Mass storage - Requires scbus and da
device          ums             # Mouse
device          uplcom
device          ucom