Re: [linux-audio-user] Kernel 2.6.x latency

My kernel config is attached. I don't have problems with latency. I'm not using any apps with GUIs, though. So you probably have more variables in the mix than I do. I'm using ecasound w/jackd and a delta66. -Eric Rz. James Stone wrote: # # Automatically generated make config: don't edit # CONFIG_X86=y CONFIG_MMU=y CONFIG_UID16=y CONFIG_GENERIC_ISA_DMA=y # # Code maturity level options # CONFIG_EXPERIMENTAL=y CONFIG_CLEAN_COMPILE=y CONFIG_STANDALONE=y CONFIG_BROKEN_ON_SMP=y # # General setup # CONFIG_SWAP=y CONFIG_SYSVIPC=y CONFIG_BSD_PROCESS_ACCT=y CONFIG_SYSCTL=y CONFIG_LOG_BUF_SHIFT=14 # CONFIG_IKCONFIG is not set # CONFIG_EMBEDDED is not set CONFIG_KALLSYMS=y CONFIG_FUTEX=y CONFIG_EPOLL=y CONFIG_IOSCHED_NOOP=y CONFIG_IOSCHED_AS=y CONFIG_IOSCHED_DEADLINE=y # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set # # Loadable module support # CONFIG_MODULES=y CONFIG_MODULE_UNLOAD=y CONFIG_MODULE_FORCE_UNLOAD=y CONFIG_OBSOLETE_MODPARM=y CONFIG_MODVERSIONS=y CONFIG_KMOD=y # # Processor type and features # CONFIG_X86_PC=y # CONFIG_X86_VOYAGER is not set # CONFIG_X86_NUMAQ is not set # CONFIG_X86_SUMMIT is not set # CONFIG_X86_BIGSMP is not set # CONFIG_X86_VISWS is not set # CONFIG_X86_GENERICARCH is not set # CONFIG_X86_ES7000 is not set # CONFIG_M386 is not set # CONFIG_M486 is not set # CONFIG_M586 is not set # CONFIG_M586TSC is not set # CONFIG_M586MMX is not set # CONFIG_M686 is not set # CONFIG_MPENTIUMII is not set # CONFIG_MPENTIUMIII is not set # CONFIG_MPENTIUM4 is not set # CONFIG_MK6 is not set CONFIG_MK7=y # CONFIG_MK8 is not set # CONFIG_MELAN is not set # CONFIG_MCRUSOE is not set # CONFIG_MWINCHIPC6 is not set # CONFIG_MWINCHIP2 is not set # CONFIG_MWINCHIP3D is not set # CONFIG_MCYRIXIII is not set # CONFIG_MVIAC3_2 is not set # CONFIG_X86_GENERIC is not set CONFIG_X86_CMPXCHG=y CONFIG_X86_XADD=y CONFIG_X86_L1_CACHE_SHIFT=6 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_X86_USE_3DNOW=y CONFIG_HPET_TIMER=y CONFIG_HPET_EMULATE_RTC=y # CONFIG_SMP is not set CONFIG_PREEMPT=y # CONFIG_X86_UP_APIC is not set CONFIG_X86_TSC=y CONFIG_X86_MCE=y # CONFIG_X86_MCE_NONFATAL is not set # CONFIG_TOSHIBA is not set # CONFIG_I8K is not set # CONFIG_MICROCODE is not set # CONFIG_X86_MSR is not set # CONFIG_X86_CPUID is not set # CONFIG_EDD is not set # CONFIG_NOHIGHMEM is not set # CONFIG_HIGHMEM4G is not set CONFIG_HIGHMEM64G=y CONFIG_HIGHMEM=y CONFIG_X86_PAE=y CONFIG_HIGHPTE=y # CONFIG_MATH_EMULATION is not set CONFIG_MTRR=y CONFIG_HAVE_DEC_LOCK=y # # Power management options (ACPI, APM) # # CONFIG_PM is not set # # ACPI (Advanced Configuration and Power Interface) Support # # CONFIG_ACPI is not set # # CPU Frequency scaling # # CONFIG_CPU_FREQ is not set # # Bus options (PCI, PCMCIA, EISA, MCA, ISA) # CONFIG_PCI=y # CONFIG_PCI_GOBIOS is not set # CONFIG_PCI_GODIRECT is not set CONFIG_PCI_GOANY=y CONFIG_PCI_BIOS=y CONFIG_PCI_DIRECT=y # CONFIG_PCI_LEGACY_PROC is not set CONFIG_PCI_NAMES=y # CONFIG_ISA is not set # CONFIG_MCA is not set # CONFIG_SCx200 is not set # CONFIG_HOTPLUG is not set # # Executable file formats # CONFIG_BINFMT_ELF=y CONFIG_BINFMT_AOUT=m CONFIG_BINFMT_MISC=m # # Device Drivers # # # Generic Driver Options # # # Memory Technology Devices (MTD) # # CONFIG_MTD is not set # # Parallel port support # # CONFIG_PARPORT is not set # # Plug and Play support # # # Block devices # CONFIG_BLK_DEV_FD=m # CONFIG_BLK_CPQ_DA is not set # CONFIG_BLK_CPQ_CISS_DA is not set # CONFIG_BLK_DEV_DAC960 is not set # CONFIG_BLK_DEV_UMEM is not set # CONFIG_BLK_DEV_LOOP is not set # CONFIG_BLK_DEV_NBD is not set # CONFIG_BLK_DEV_RAM is not set CONFIG_BLK_DEV_INITRD=y # CONFIG_LBD is not set # # ATA/ATAPI/MFM/RLL support # CONFIG_IDE=y CONFIG_BLK_DEV_IDE=y # # Please see Documentation/ide.txt for help/info on IDE drives # # CONFIG_BLK_DEV_HD_IDE is not set CONFIG_BLK_DEV_IDEDISK=y CONFIG_IDEDISK_MULTI_MODE=y # CONFIG_IDEDISK_STROKE is not set # CONFIG_BLK_DEV_IDECD is not set # CONFIG_BLK_DEV_IDETAPE is not set # CONFIG_BLK_DEV_IDEFLOPPY is not set # CONFIG_IDE_TASK_IOCTL is not set # CONFIG_IDE_TASKFILE_IO is not set # # IDE chipset support/bugfixes # CONFIG_IDE_GENERIC=y # CONFIG_BLK_DEV_CMD640 is not set CONFIG_BLK_DEV_IDEPCI=y CONFIG_IDEPCI_SHARE_IRQ=y # CONFIG_BLK_DEV_OFFBOARD is not set CONFIG_BLK_DEV_GENERIC=y # CONFIG_BLK_DEV_OPTI621 is not set # CONFIG_BLK_DEV_RZ1000 is not set CONFIG_BLK_DEV_IDEDMA_PCI=y # CONFIG_BLK_DEV_IDEDMA_FORCED is not set CONFIG_IDEDMA_PCI_AUTO=y # CONFIG_IDEDMA_ONLYDISK is not set CONFIG_BLK_DEV_ADMA=y # CONFIG_BLK_DEV_AEC62XX is not set # CONFIG_BLK_DEV_ALI15X3 is not set # CONFIG_BLK_DEV_AMD74XX is not set # CONFIG_BLK_DEV_CMD64X is not set # CONFIG_BLK_DEV_TRIFLEX is not set # CONFIG_BLK_DEV_CY82C693 is not set # CONFIG_BLK_DEV_CS5520 is not set # CONFIG_BLK_DEV_CS5530 is not set # CONFIG_BLK_DEV_HPT34X is not set # CONFIG_BLK_DEV_HPT366 is not set # CONFIG_BLK_DEV_SC1200 is not set # CONFIG_BLK_DEV_PIIX is not set # CONFIG_BLK_DEV_NS87415 is not set # CONFIG_BLK_DEV_PDC202XX_OLD is not set # CONFIG_BLK_DEV_PDC202XX_NEW is not set # CONFIG_BLK_DEV_SVWKS is not set # CONFIG_BLK_DEV_SIIMAGE is not set # CONFIG_BLK_DEV_SIS5513 is not set # CONFIG_BLK_DEV_SLC90E66 is not set # CONFIG_BLK_DEV_TRM290 is not set CONFIG_BLK_DEV_VIA82CXXX=y CONFIG_BLK_DEV_IDEDMA=y # CONFIG_IDEDMA_IVB is not set CONFIG_IDEDMA_AUTO=y # CONFIG_DMA_NONPCI is not set # CONFIG_BLK_DEV_HD is not set # # SCSI device support # # CONFIG_SCSI is not set # # Multi-device support (RAID and LVM) # # CONFIG_MD is not set # # Fusion MPT device support # # # IEEE 1394 (FireWire) support (EXPERIMENTAL) # # CONFIG_IEEE1394 is not set # # I2O device support # # CONFIG_I2O is not set # # Macintosh device drivers # # # Networking support # CONFIG_NET=y # # Networking options # CONFIG_PACKET=y CONFIG_PACKET_MMAP=y CONFIG_NETLINK_DEV=y CONFIG_UNIX=y CONFIG_NET_KEY=y CONFIG_INET=y # CONFIG_IP_MULTICAST is not set # CONFIG_IP_ADVANCED_ROUTER is not set # CONFIG_IP_PNP is not set # CONFIG_NET_IPIP is not set # CONFIG_NET_IPGRE is not set # CONFIG_ARPD is not set # CONFIG_INET_ECN is not set CONFIG_SYN_COOKIES=y # CONFIG_INET_AH is not set # CONFIG_INET_ESP is not set # CONFIG_INET_IPCOMP is not set # # IP: Virtual Server Configuration # # CONFIG_IP_VS is not set # CONFIG_IPV6 is not set # CONFIG_DECNET is not set # CONFIG_BRIDGE is not set CONFIG_NETFILTER=y # CONFIG_NETFILTER_DEBUG is not set # # IP: Netfilter Configuration # # CONFIG_IP_NF_CONNTRACK is not set # CONFIG_IP_NF_QUEUE is not set CONFIG_IP_NF_IPTABLES=m # CONFIG_IP_NF_MATCH_LIMIT is not set # CONFIG_IP_NF_MATCH_IPRANGE is not set # CONFIG_IP_NF_MATCH_MAC is not set # CONFIG_IP_NF_MATCH_PKTTYPE is not set # CONFIG_IP_NF_MATCH_MARK is not set # CONFIG_IP_NF_MATCH_MULTIPORT is not set # CONFIG_IP_NF_MATCH_TOS is not set # CONFIG_IP_NF_MATCH_RECENT is not set # CONFIG_IP_NF_MATCH_ECN is not set # CONFIG_IP_NF_MATCH_DSCP is not set # CONFIG_IP_NF_MATCH_AH_ESP is not set # CONFIG_IP_NF_MATCH_LENGTH is not set # CONFIG_IP_NF_MATCH_TTL is not set # CONFIG_IP_NF_MATCH_TCPMSS is not set # CONFIG_IP_NF_MATCH_OWNER is not set CONFIG_IP_NF_FILTER=m CONFIG_IP_NF_TARGET_REJECT=m # CONFIG_IP_NF_MANGLE is not set # CONFIG_IP_NF_TARGET_LOG is not set # CONFIG_IP_NF_TARGET_ULOG is not set # CONFIG_IP_NF_TARGET_TCPMSS is not set # CONFIG_IP_NF_ARPTABLES is not set # CONFIG_IP_NF_COMPAT_IPCHAINS is not set # CONFIG_IP_NF_COMPAT_IPFWADM is not set CONFIG_XFRM=y # CONFIG_XFRM_USER is not set # # SCTP Configuration (EXPERIMENTAL) # CONFIG_IPV6_SCTP__=y # CONFIG_IP_SCTP is not set # CONFIG_ATM is not set # CONFIG_VLAN_8021Q is not set # CONFIG_LLC2 is not set # CONFIG_IPX is not set # CONFIG_ATALK is not set # CONFIG_X25 is not set # CONFIG_LAPB is not set # CONFIG_NET_DIVERT is not set # CONFIG_ECONET is not set # CONFIG_WAN_ROUTER is not set # CONFIG_NET_FASTROUTE is not set # CONFIG_NET_HW_FLOWCONTROL is not set # # QoS and/or fair queueing # # CONFIG_NET_SCHED is not set # # Network testing # # CONFIG_NET_PKTGEN is not set CONFIG_NETDEVICES=y # # ARCnet devices # # CONFIG_ARCNET is not set # CONFIG_DUMMY is not set # CONFIG_BONDING is not set # CONFIG_EQUALIZER is not set # CONFIG_TUN is not set # CONFIG_ETHERTAP is not set # # Ethernet (10 or 100Mbit) # CONFIG_NET_ETHERNET=y CONFIG_MII=y # CONFIG_HAPPYMEAL is not set # CONFIG_SUNGEM is not set # CONFIG_NET_VENDOR_3COM is not set # # Tulip family network device support # # CONFIG_NET_TULIP is not set # CONFIG_HP100 is not set CONFIG_NET_PCI=y # CONFIG_PCNET32 is not set # CONFIG_AMD8111_ETH is not set # CONFIG_ADAPTEC_STARFIRE is not set # CONFIG_B44 is not set # CONFIG_FORCEDETH is not set # CONFIG_DGRS is not set # CONFIG_EEPRO100 is not set # CONFIG_E100 is not set # CONFIG_FEALNX is not set # CONFIG_NATSEMI is not set # CONFIG_NE2K_PCI is not set # CONFIG_8139CP is not set # CONFIG_8139TOO is not set # CONFIG_SIS900 is not set # CONFIG_EPIC100 is not set # CONFIG_SUNDANCE is not set # CONFIG_TLAN is not set CONFIG_VIA_RHINE=y # CONFIG_VIA_RHINE_MMIO is not set # # Ethernet (1000 Mbit) # # CONFIG_ACENIC is not set CONFIG_DL2K=m CONFIG_E1000=m CONFIG_E1000_NAPI=y CONFIG_NS83820=m CONFIG_HAMACHI=m CONFIG_YELLOWFIN=m CONFIG_R8169=m # CONFIG_SIS190 is not set CONFIG_SK98LIN=m CONFIG_TIGON3=m # # Ethernet (10000 Mbit) # # CONFIG_IXGB is not set # CONFIG_FDDI is not set # CONFIG_HIPPI is not set # CONFIG_PPP is not set # CONFIG_SLIP is not set # # Wireless LAN (non-hamradio) # # CONFIG_NET_RADIO is not set # # Token Ring devices # # CONFIG_TR is not set # CONFIG_RCPCI is not set # CONFIG_SHAPER is not set # # Wan interfaces # # CONFIG_WAN is not set # # Amateur Radio support # # CONFIG_HAMRADIO is not set # # IrDA (infrared) support # # CONFIG_IRDA is not set # # Bluetooth support # # CONFIG_BT is not set # # ISDN subsystem # # CONFIG_ISDN_BOOL is not set # # Telephony Support # # CONFIG_PHONE is not set # # Input device support # CONFIG_INPUT=y # # Userland interfaces # CONFIG_INPUT_MOUSEDEV=y CONFIG_INPUT_MOUSEDEV_PSAUX=y CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024 CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768 # CONFIG_INPUT_JOYDEV is not set # CONFIG_INPUT_TSDEV is not set # CONFIG_INPUT_EVDEV is not set # CONFIG_INPUT_EVBUG is not set # # Input I/O drivers # # CONFIG_GAMEPORT is not set CONFIG_SOUND_GAMEPORT=y CONFIG_SERIO=y CONFIG_SERIO_I8042=y # CONFIG_SERIO_SERPORT is not set # CONFIG_SERIO_CT82C710 is not set # CONFIG_SERIO_PCIPS2 is not set # # Input Device Drivers # CONFIG_INPUT_KEYBOARD=y CONFIG_KEYBOARD_ATKBD=y # CONFIG_KEYBOARD_SUNKBD is not set # CONFIG_KEYBOARD_XTKBD is not set # CONFIG_KEYBOARD_NEWTON is not set CONFIG_INPUT_MOUSE=y CONFIG_MOUSE_PS2=y # CONFIG_MOUSE_SERIAL is not set # CONFIG_INPUT_JOYSTICK is not set # CONFIG_INPUT_TOUCHSCREEN is not set # CONFIG_INPUT_MISC is not set # # Character devices # CONFIG_VT=y CONFIG_VT_CONSOLE=y CONFIG_HW_CONSOLE=y # CONFIG_SERIAL_NONSTANDARD is not set # # Serial drivers # # CONFIG_SERIAL_8250 is not set # # Non-8250 serial port support # CONFIG_UNIX98_PTYS=y CONFIG_UNIX98_PTY_COUNT=256 # # Mice # # CONFIG_BUSMOUSE is not set # CONFIG_QIC02_TAPE is not set # # IPMI # # CONFIG_IPMI_HANDLER is not set # # Watchdog Cards # # CONFIG_WATCHDOG is not set CONFIG_HW_RANDOM=y # CONFIG_NVRAM is not set CONFIG_RTC=y # CONFIG_DTLK is not set # CONFIG_R3964 is not set # CONFIG_APPLICOM is not set # CONFIG_SONYPI is not set # # Ftape, the floppy tape device driver # # CONFIG_FTAPE is not set # CONFIG_AGP is not set # CONFIG_DRM is not set # CONFIG_MWAVE is not set # CONFIG_RAW_DRIVER is not set # CONFIG_HANGCHECK_TIMER is not set # # I2C support # # CONFIG_I2C is not set # # Multimedia devices # # CONFIG_VIDEO_DEV is not set # # Digital Video Broadcasting Devices # # CONFIG_DVB is not set # # Graphics support # CONFIG_FB=y # CONFIG_FB_CYBER2000 is not set # CONFIG_FB_IMSTT is not set CONFIG_FB_VGA16=y CONFIG_FB_VESA=y CONFIG_VIDEO_SELECT=y # CONFIG_FB_HGA is not set # CONFIG_FB_RIVA is not set # CONFIG_FB_MATROX is not set # CONFIG_FB_RADEON_OLD is not set # CONFIG_FB_RADEON is not set CONFIG_FB_ATY128=y # CONFIG_FB_ATY is not set # CONFIG_FB_SIS is not set # CONFIG_FB_NEOMAGIC is not set # CONFIG_FB_KYRO is not set # CONFIG_FB_3DFX is not set # CONFIG_FB_VOODOO1 is not set # CONFIG_FB_TRIDENT is not set # CONFIG_FB_VIRTUAL is not set # # Console display driver support # CONFIG_VGA_CONSOLE=y # CONFIG_MDA_CONSOLE is not set CONFIG_DUMMY_CONSOLE=y CONFIG_FRAMEBUFFER_CONSOLE=y CONFIG_PCI_CONSOLE=y # CONFIG_FONTS is not set CONFIG_FONT_8x8=y CONFIG_FONT_8x16=y # # Logo configuration # # CONFIG_LOGO is not set # # Sound # CONFIG_SOUND=m # # Advanced Linux Sound Architecture # # CONFIG_SND is not set # # Open Sound System # # CONFIG_SOUND_PRIME is not set # # USB support # # CONFIG_USB is not set # # USB Gadget Support # # CONFIG_USB_GADGET is not set # # File systems # CONFIG_EXT2_FS=y # CONFIG_EXT2_FS_XATTR is not set # CONFIG_EXT3_FS is not set # CONFIG_JBD is not set # CONFIG_REISERFS_FS is not set # CONFIG_JFS_FS is not set # CONFIG_XFS_FS is not set CONFIG_MINIX_FS=m # CONFIG_ROMFS_FS is not set # CONFIG_QUOTA is not set # CONFIG_AUTOFS_FS is not set # CONFIG_AUTOFS4_FS is not set # # CD-ROM/DVD Filesystems # # CONFIG_ISO9660_FS is not set # CONFIG_UDF_FS is not set # # DOS/FAT/NT Filesystems # # CONFIG_FAT_FS is not set # CONFIG_NTFS_FS is not set # # Pseudo filesystems # CONFIG_PROC_FS=y CONFIG_PROC_KCORE=y # CONFIG_DEVFS_FS is not set CONFIG_DEVPTS_FS=y # CONFIG_DEVPTS_FS_XATTR is not set CONFIG_TMPFS=y # CONFIG_HUGETLBFS is not set # CONFIG_HUGETLB_PAGE is not set CONFIG_RAMFS=y # # Miscellaneous filesystems # # CONFIG_ADFS_FS is not set # CONFIG_AFFS_FS is not set # CONFIG_HFS_FS is not set # CONFIG_BEFS_FS is not set # CONFIG_BFS_FS is not set # CONFIG_EFS_FS is not set # CONFIG_CRAMFS is not set # CONFIG_VXFS_FS is not set # CONFIG_HPFS_FS is not set # CONFIG_QNX4FS_FS is not set # CONFIG_SYSV_FS is not set # CONFIG_UFS_FS is not set # # Network File Systems # # CONFIG_NFS_FS is not set # CONFIG_NFSD is not set # CONFIG_EXPORTFS is not set # CONFIG_SMB_FS is not set # CONFIG_CIFS is not set # CONFIG_NCP_FS is not set # CONFIG_CODA_FS is not set # CONFIG_INTERMEZZO_FS is not set # CONFIG_AFS_FS is not set # # Partition Types # # CONFIG_PARTITION_ADVANCED is not set CONFIG_MSDOS_PARTITION=y # # Native Language Support # # CONFIG_NLS is not set # # Profiling support # # CONFIG_PROFILING is not set # # Kernel hacking # CONFIG_DEBUG_KERNEL=y # CONFIG_DEBUG_STACKOVERFLOW is not set # CONFIG_DEBUG_SLAB is not set # CONFIG_DEBUG_IOVIRT is not set CONFIG_MAGIC_SYSRQ=y # CONFIG_DEBUG_SPINLOCK is not set # CONFIG_DEBUG_PAGEALLOC is not set # CONFIG_DEBUG_HIGHMEM is not set # CONFIG_DEBUG_INFO is not set # CONFIG_DEBUG_SPINLOCK_SLEEP is not set # CONFIG_FRAME_POINTER is not set # # Security options # CONFIG_SECURITY=y # CONFIG_SECURITY_NETWORK is not set CONFIG_SECURITY_CAPABILITIES=m # CONFIG_SECURITY_SELINUX is not set # # Cryptographic options # # CONFIG_CRYPTO is not set # # Library routines # CONFIG_CRC32=y CONFIG_X86_BIOS_REBOOT=y CONFIG_PC=y