Re: [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28

Christoph Lameter
2008-09-12T22:05:20Z

Rafael J. Wysocki wrote:
> This message has been generated automatically as a part of a report
> of recent regressions.
>
> The following bug entry is on the current list of known regressions
> from 2.6.26. Please verify if it still should be listed and let me know
> (either way).
>
>
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11308
> Subject : tbench regression on each kernel release from 2.6.22 -&gt; 2.6.28
> Submitter : Christoph Lameter <cl-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
> Date : 2008-08-11 18:36 (33 days old)
> References : http://marc.info/?l=linux-kernel&m=121847986119495&w=4
>
>
>

tbench

2.6.27-rc6 2760 MB/sec
2.6.22 3235.47 MB/sec

diff on the .config files for each (took .22 config and did a make oldconfig)

--- /boot/config-2.6.22.1-4U4JUMP1.12 2008-01-22 08:06:38.000000000 -0600
+++ .config 2008-09-12 16:33:52.000000000 -0500
@@ -1,55 +1,89 @@
#
# Automatically generated make config: don't edit
-# Linux kernel version: 2.6.22.1-4U4JUMP1.12
-# Mon Jan 21 16:05:52 2008
+# Linux kernel version: 2.6.27-rc6
+# Fri Sep 12 16:33:52 2008
#
+# CONFIG_64BIT is not set
CONFIG_X86_32=y
+# CONFIG_X86_64 is not set
+CONFIG_X86=y
+CONFIG_ARCH_DEFCONFIG="arch/x86/configs/i386_defconfig"
+# CONFIG_GENERIC_LOCKBREAK is not set
CONFIG_GENERIC_TIME=y
+CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
-CONFIG_SEMAPHORE_SLEEPERS=y
-CONFIG_X86=y
+CONFIG_HAVE_LATENCYTOP_SUPPORT=y
+CONFIG_FAST_CMPXCHG_LOCAL=y
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
-CONFIG_QUICKLIST=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_HWEIGHT=y
+# CONFIG_GENERIC_GPIO is not set
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
-CONFIG_DMI=y
+# CONFIG_RWSEM_GENERIC_SPINLOCK is not set
+CONFIG_RWSEM_XCHGADD_ALGORITHM=y
+# CONFIG_ARCH_HAS_ILOG2_U32 is not set
+# CONFIG_ARCH_HAS_ILOG2_U64 is not set
+CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y
+CONFIG_GENERIC_CALIBRATE_DELAY=y
+# CONFIG_GENERIC_TIME_VSYSCALL is not set
+CONFIG_ARCH_HAS_CPU_RELAX=y
+CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
+CONFIG_HAVE_SETUP_PER_CPU_AREA=y
+# CONFIG_HAVE_CPUMASK_OF_CPU_MAP is not set
+CONFIG_ARCH_HIBERNATION_POSSIBLE=y
+CONFIG_ARCH_SUSPEND_POSSIBLE=y
+# CONFIG_ZONE_DMA32 is not set
+CONFIG_ARCH_POPULATES_NODE_MAP=y
+# CONFIG_AUDIT_ARCH is not set
+CONFIG_ARCH_SUPPORTS_AOUT=y
+CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING=y
+CONFIG_GENERIC_HARDIRQS=y
+CONFIG_GENERIC_IRQ_PROBE=y
+CONFIG_GENERIC_PENDING_IRQ=y
+CONFIG_X86_SMP=y
+CONFIG_X86_32_SMP=y
+CONFIG_X86_HT=y
+CONFIG_X86_BIOS_REBOOT=y
+CONFIG_X86_TRAMPOLINE=y
+CONFIG_KTIME_SCALAR=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"

#
-# Code maturity level options
+# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_LOCK_KERNEL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
-
-#
-# General setup
-#
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
-# CONFIG_IPC_NS is not set
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_TASKSTATS is not set
-# CONFIG_UTS_NS is not set
# CONFIG_AUDIT is not set
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=18
-# CONFIG_CPUSETS is not set
+# CONFIG_CGROUPS is not set
+CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y
+# CONFIG_GROUP_SCHED is not set
CONFIG_SYSFS_DEPRECATED=y
+CONFIG_SYSFS_DEPRECATED_V2=y
# CONFIG_RELAY is not set
+CONFIG_NAMESPACES=y
+# CONFIG_UTS_NS is not set
+# CONFIG_IPC_NS is not set
+# CONFIG_USER_NS is not set
+# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
@@ -64,6 +98,8 @@
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
+CONFIG_PCSPKR_PLATFORM=y
+CONFIG_COMPAT_BRK=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_ANON_INODES=y
@@ -76,28 +112,40 @@
CONFIG_SLAB=y
# CONFIG_SLUB is not set
# CONFIG_SLOB is not set
+CONFIG_PROFILING=y
+# CONFIG_MARKERS is not set
+CONFIG_OPROFILE=y
+CONFIG_HAVE_OPROFILE=y
+CONFIG_KPROBES=y
+CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
+CONFIG_KRETPROBES=y
+CONFIG_HAVE_IOREMAP_PROT=y
+CONFIG_HAVE_KPROBES=y
+CONFIG_HAVE_KRETPROBES=y
+# CONFIG_HAVE_ARCH_TRACEHOOK is not set
+# CONFIG_HAVE_DMA_ATTRS is not set
+CONFIG_USE_GENERIC_SMP_HELPERS=y
+# CONFIG_HAVE_CLK is not set
+CONFIG_PROC_PAGE_MONITOR=y
+CONFIG_HAVE_GENERIC_DMA_COHERENT=y
+CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
-
-#
-# Loadable module support
-#
CONFIG_MODULES=y
+# CONFIG_MODULE_FORCE_LOAD is not set
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
-# CONFIG_KMOD is not set
+CONFIG_KMOD=y
CONFIG_STOP_MACHINE=y
-
-#
-# Block layer
-#
CONFIG_BLOCK=y
CONFIG_LBD=y
# CONFIG_BLK_DEV_IO_TRACE is not set
# CONFIG_LSF is not set
+# CONFIG_BLK_DEV_BSG is not set
+# CONFIG_BLK_DEV_INTEGRITY is not set

#
# IO Schedulers
@@ -111,6 +159,7 @@
# CONFIG_DEFAULT_CFQ is not set
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="anticipatory"
+CONFIG_CLASSIC_RCU=y

#
# Processor type and features
@@ -118,17 +167,23 @@
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
+CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_SMP=y
+CONFIG_X86_FIND_SMP_CONFIG=y
+CONFIG_X86_MPPARSE=y
# CONFIG_X86_PC is not set
# CONFIG_X86_ELAN is not set
# CONFIG_X86_VOYAGER is not set
+CONFIG_X86_GENERICARCH=y
# 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=y
# CONFIG_X86_ES7000 is not set
-# CONFIG_PARAVIRT is not set
+# CONFIG_X86_BIGSMP is not set
+# CONFIG_X86_VSMP is not set
+# CONFIG_X86_RDC321X is not set
+CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
+# CONFIG_PARAVIRT_GUEST is not set
+# CONFIG_MEMTEST is not set
CONFIG_X86_CYCLONE_TIMER=y
# CONFIG_M386 is not set
# CONFIG_M486 is not set
@@ -139,7 +194,6 @@
# CONFIG_MPENTIUMII is not set
# CONFIG_MPENTIUMIII is not set
# CONFIG_MPENTIUMM is not set
-CONFIG_MCORE2=y
# CONFIG_MPENTIUM4 is not set
# CONFIG_MK6 is not set
# CONFIG_MK7 is not set
@@ -154,33 +208,34 @@
# CONFIG_MCYRIXIII is not set
# CONFIG_MVIAC3_2 is not set
# CONFIG_MVIAC7 is not set
+# CONFIG_MPSC is not set
+CONFIG_MCORE2=y
+# CONFIG_GENERIC_CPU is not set
CONFIG_X86_GENERIC=y
+CONFIG_X86_CPU=y
CONFIG_X86_CMPXCHG=y