Re: Re: network performance drop heavily in xen 4.0 release

[listmail <listmail@triad.rr.com>]

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a quick diff between the two (attached file is full diff -u output)

$ grep '^+' xenperf.diff
+++ config-2.6.31.13-high performance    2010-04-24 12:07:04.000000000 -0400
+# Fri Apr 16 13:26:59 2010
+# CONFIG_XEN_DEBUG_FS is not set
+# CONFIG_X86_CPU_DEBUG is not set
+# CONFIG_PM_DEBUG is not set
+# CONFIG_CPU_FREQ_DEBUG is not set
+# CONFIG_CAN_DEBUG_DEVICES is not set
+# CONFIG_CFG80211_DEBUGFS is not set
+CONFIG_BLK_DEV_LOOP=m
+# CONFIG_SCSI_DEBUG is not set
+CONFIG_ATA_PIIX=m
+# CONFIG_DM_DEBUG is not set
+# CONFIG_LIBERTAS_DEBUG is not set
+# CONFIG_ATH5K_DEBUG is not set
+# CONFIG_IWLWIFI_DEBUG is not set
+# CONFIG_B43_DEBUG is not set
+# CONFIG_B43LEGACY_DEBUG is not set
+# CONFIG_RT2X00_LIB_DEBUGFS is not set
+# CONFIG_SND_DEBUG is not set
+# CONFIG_HID_DEBUG is not set
+# CONFIG_USB_SERIAL_DEBUG is not set
+# CONFIG_INFINIBAND_IPOIB_DEBUG_DATA is not set
+CONFIG_XEN_DEV_EVTCHN=y
+# CONFIG_JBD2_DEBUG is not set
+# CONFIG_DLM_DEBUG is not set
+# CONFIG_DEBUG_KERNEL is not set
+# CONFIG_SLUB_DEBUG_ON is not set
+# CONFIG_DYNAMIC_DEBUG is not set
+# CONFIG_DMA_API_DEBUG is not set
+# CONFIG_KEYS_DEBUG_PROC_KEYS is not set




listmail wrote:
> Or nevermind... :)  The *config-2.6.31-13xen 
> <http://lists.xensource.com/archives/html/xen-devel/2010-04/binpV1aVlN6Wc.bin> 
> you originally posted was the one *with* the performance issue.  I was 
> surprised to not see any debug differences.
>
> *listmail wrote:
>> Do you mind attaching the config for 2.6.18.8 ?  I believe we should 
>> be comparing that with "config-2.6.31.13-high performance"
>>
>>
>> Ronaldo C. A. Chaves wrote:
>>> I compared the config-2.6.31-13xen* *with the config-2.6.31.13-high 
>>> performance.
>>>
>>>
>>> 2010/4/24 yingbin wang <yingbin.wangyb@gmail.com 
>>> <mailto:yingbin.wangyb@gmail.com>>
>>>
>>>     which .config you compare with?
>>>
>>>     2010/4/24 Ronaldo C. A. Chaves <xarqui@gmail.com
>>>     <mailto:xarqui@gmail.com>>:
>>>     > I compared the files and the difference is
>>>     >
>>>     > CONFIG_BLK_DEV_LOOP=m
>>>     > CONFIG_ATA_PIIX=m
>>>     > CONFIG_XEN_DEV_EVTCHN=y
>>>     >
>>>     > in config-2.6.31.13-high performance.
>>>     >
>>>     >
>>>
>>
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@lists.xensource.com
>> http://lists.xensource.com/xen-devel
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel


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[-- Type: text/x-patch, Size: 10300 bytes --]

$ diff -u config-2.6.31-13xen config-2.6.31.13-high\ performance
--- config-2.6.31-13xen	2010-04-24 12:06:08.000000000 -0400
+++ config-2.6.31.13-high performance	2010-04-24 12:07:04.000000000 -0400
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
 # Linux kernel version: 2.6.31.13
-# Fri Apr  9 01:50:40 2010
+# Fri Apr 16 13:26:59 2010
 #
 CONFIG_64BIT=y
 # CONFIG_X86_32 is not set
@@ -241,7 +241,7 @@
 CONFIG_XEN_TIME_VSYSCALL=y
 CONFIG_XEN_MAX_DOMAIN_MEMORY=32
 CONFIG_XEN_SAVE_RESTORE=y
-CONFIG_XEN_DEBUG_FS=y
+# CONFIG_XEN_DEBUG_FS is not set
 CONFIG_XEN_DOM0=y
 CONFIG_XEN_PRIVILEGED_GUEST=y
 CONFIG_XEN_DOM0_PCI=y
@@ -253,7 +253,6 @@
 # CONFIG_PARAVIRT_SPINLOCKS is not set
 CONFIG_PARAVIRT_CLOCK=y
 CONFIG_PARAVIRT_CLOCK_VSYSCALL=y
-# CONFIG_PARAVIRT_DEBUG is not set
 # CONFIG_MEMTEST is not set
 # CONFIG_M386 is not set
 # CONFIG_M486 is not set
@@ -306,7 +305,6 @@
 CONFIG_SWIOTLB=y
 CONFIG_IOMMU_HELPER=y
 CONFIG_IOMMU_API=y
-# CONFIG_MAXSMP is not set
 CONFIG_NR_CPUS=512
 CONFIG_SCHED_SMT=y
 CONFIG_SCHED_MC=y
@@ -330,7 +328,7 @@
 CONFIG_MICROCODE_OLD_INTERFACE=y
 CONFIG_X86_MSR=y
 CONFIG_X86_CPUID=y
-CONFIG_X86_CPU_DEBUG=m
+# CONFIG_X86_CPU_DEBUG is not set
 CONFIG_ARCH_PHYS_ADDR_T_64BIT=y
 CONFIG_DIRECT_GBPAGES=y
 CONFIG_NUMA=y
@@ -401,15 +399,10 @@
 #
 CONFIG_ARCH_HIBERNATION_HEADER=y
 CONFIG_PM=y
-CONFIG_PM_DEBUG=y
-# CONFIG_PM_VERBOSE is not set
-CONFIG_CAN_PM_TRACE=y
-CONFIG_PM_TRACE=y
-CONFIG_PM_TRACE_RTC=y
+# CONFIG_PM_DEBUG is not set
 CONFIG_PM_SLEEP_SMP=y
 CONFIG_PM_SLEEP=y
 CONFIG_SUSPEND=y
-CONFIG_PM_TEST_SUSPEND=y
 CONFIG_SUSPEND_FREEZER=y
 CONFIG_HIBERNATION_NVS=y
 CONFIG_HIBERNATION=y
@@ -443,7 +436,7 @@
 #
 CONFIG_CPU_FREQ=y
 CONFIG_CPU_FREQ_TABLE=m
-CONFIG_CPU_FREQ_DEBUG=y
+# CONFIG_CPU_FREQ_DEBUG is not set
 CONFIG_CPU_FREQ_STAT=m
 CONFIG_CPU_FREQ_STAT_DETAILS=y
 # CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
@@ -502,7 +495,6 @@
 CONFIG_ARCH_SUPPORTS_MSI=y
 CONFIG_PCI_MSI=y
 CONFIG_PCI_LEGACY=y
-# CONFIG_PCI_DEBUG is not set
 CONFIG_PCI_STUB=y
 CONFIG_HT_IRQ=y
 CONFIG_PCI_IOV=y
@@ -857,12 +849,6 @@
 # CONFIG_IP_DCCP_CCID3_DEBUG is not set
 CONFIG_IP_DCCP_CCID3_RTO=100
 CONFIG_IP_DCCP_TFRC_LIB=y
-
-#
-# DCCP Kernel Hacking
-#
-# CONFIG_IP_DCCP_DEBUG is not set
-CONFIG_NET_DCCPPROBE=m
 CONFIG_IP_SCTP=m
 # CONFIG_SCTP_DBG_MSG is not set
 # CONFIG_SCTP_DBG_OBJCNT is not set
@@ -1010,7 +996,7 @@
 CONFIG_CAN_SJA1000_PLATFORM=m
 CONFIG_CAN_EMS_PCI=m
 CONFIG_CAN_KVASER_PCI=m
-CONFIG_CAN_DEBUG_DEVICES=y
+# CONFIG_CAN_DEBUG_DEVICES is not set
 CONFIG_IRDA=m
 
 #
@@ -1100,7 +1086,7 @@
 CONFIG_WIRELESS=y
 CONFIG_CFG80211=m
 # CONFIG_CFG80211_REG_DEBUG is not set
-CONFIG_CFG80211_DEBUGFS=y
+# CONFIG_CFG80211_DEBUGFS is not set
 # CONFIG_WIRELESS_OLD_REGULATORY is not set
 CONFIG_WIRELESS_EXT=y
 CONFIG_WIRELESS_EXT_SYSFS=y
@@ -1146,8 +1132,6 @@
 CONFIG_FW_LOADER=y
 # CONFIG_FIRMWARE_IN_KERNEL is not set
 CONFIG_EXTRA_FIRMWARE=""
-# CONFIG_DEBUG_DRIVER is not set
-CONFIG_DEBUG_DEVRES=y
 CONFIG_SYS_HYPERVISOR=y
 CONFIG_CONNECTOR=y
 CONFIG_PROC_EVENTS=y
@@ -1328,7 +1312,7 @@
 CONFIG_BLK_DEV_DAC960=m
 CONFIG_BLK_DEV_UMEM=m
 # CONFIG_BLK_DEV_COW_COMMON is not set
-CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_LOOP=m
 CONFIG_BLK_DEV_CRYPTOLOOP=m
 CONFIG_BLK_DEV_NBD=m
 CONFIG_BLK_DEV_OSD=m
@@ -1480,7 +1464,7 @@
 # CONFIG_SCSI_LPFC_DEBUG_FS is not set
 CONFIG_SCSI_DC395x=m
 CONFIG_SCSI_DC390T=m
-CONFIG_SCSI_DEBUG=m
+# CONFIG_SCSI_DEBUG is not set
 CONFIG_SCSI_SRP=m
 CONFIG_SCSI_LOWLEVEL_PCMCIA=y
 # CONFIG_PCMCIA_FDOMAIN is not set
@@ -1503,7 +1487,7 @@
 CONFIG_SATA_SIL24=m
 CONFIG_ATA_SFF=y
 CONFIG_SATA_SVW=m
-CONFIG_ATA_PIIX=y
+CONFIG_ATA_PIIX=m
 CONFIG_SATA_MV=m
 CONFIG_SATA_NV=m
 CONFIG_PDC_ADMA=m
@@ -1570,7 +1554,7 @@
 CONFIG_MD_MULTIPATH=m
 CONFIG_MD_FAULTY=m
 CONFIG_BLK_DEV_DM=y
-CONFIG_DM_DEBUG=y
+# CONFIG_DM_DEBUG is not set
 CONFIG_DM_CRYPT=m
 CONFIG_DM_SNAPSHOT=y
 CONFIG_DM_MIRROR=y
@@ -1789,7 +1773,7 @@
 CONFIG_LIBERTAS_USB=m
 CONFIG_LIBERTAS_CS=m
 CONFIG_LIBERTAS_SDIO=m
-CONFIG_LIBERTAS_DEBUG=y
+# CONFIG_LIBERTAS_DEBUG is not set
 CONFIG_LIBERTAS_THINFIRM=m
 CONFIG_LIBERTAS_THINFIRM_USB=m
 CONFIG_AIRO=m
@@ -1814,7 +1798,7 @@
 CONFIG_P54_LEDS=y
 CONFIG_ATH_COMMON=m
 CONFIG_ATH5K=m
-CONFIG_ATH5K_DEBUG=y
+# CONFIG_ATH5K_DEBUG is not set
 CONFIG_ATH9K=m
 # CONFIG_ATH9K_DEBUG is not set
 CONFIG_AR9170_USB=m
@@ -1833,8 +1817,7 @@
 CONFIG_IWLWIFI=m
 CONFIG_IWLWIFI_LEDS=y
 CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT=y
-CONFIG_IWLWIFI_DEBUG=y
-CONFIG_IWLWIFI_DEBUGFS=y
+# CONFIG_IWLWIFI_DEBUG is not set
 CONFIG_IWLAGN=m
 CONFIG_IWL4965=y
 CONFIG_IWL5000=y
@@ -1853,14 +1836,13 @@
 CONFIG_B43_PIO=y
 CONFIG_B43_LEDS=y
 CONFIG_B43_HWRNG=y
-CONFIG_B43_DEBUG=y
-# CONFIG_B43_FORCE_PIO is not set
+# CONFIG_B43_DEBUG is not set
 CONFIG_B43LEGACY=m
 CONFIG_B43LEGACY_PCI_AUTOSELECT=y
 CONFIG_B43LEGACY_PCICORE_AUTOSELECT=y
 CONFIG_B43LEGACY_LEDS=y
 CONFIG_B43LEGACY_HWRNG=y
-CONFIG_B43LEGACY_DEBUG=y
+# CONFIG_B43LEGACY_DEBUG is not set
 CONFIG_B43LEGACY_DMA=y
 CONFIG_B43LEGACY_PIO=y
 CONFIG_B43LEGACY_DMA_AND_PIO_MODE=y
@@ -1883,7 +1865,7 @@
 CONFIG_RT2X00_LIB_CRYPTO=y
 CONFIG_RT2X00_LIB_RFKILL=y
 CONFIG_RT2X00_LIB_LEDS=y
-CONFIG_RT2X00_LIB_DEBUGFS=y
+# CONFIG_RT2X00_LIB_DEBUGFS is not set
 # CONFIG_RT2X00_DEBUG is not set
 CONFIG_HERMES=m
 CONFIG_HERMES_CACHE_FW_ON_INIT=y
@@ -2308,7 +2290,6 @@
 #
 CONFIG_SERIAL_CORE=y
 CONFIG_SERIAL_CORE_CONSOLE=y
-CONFIG_CONSOLE_POLL=y
 CONFIG_SERIAL_JSM=m
 CONFIG_UNIX98_PTYS=y
 CONFIG_DEVPTS_MULTIPLE_INSTANCES=y
@@ -3141,9 +3122,7 @@
 # CONFIG_SND_SUPPORT_OLD_API is not set
 CONFIG_SND_VERBOSE_PROCFS=y
 CONFIG_SND_VERBOSE_PRINTK=y
-CONFIG_SND_DEBUG=y
-# CONFIG_SND_DEBUG_VERBOSE is not set
-CONFIG_SND_PCM_XRUN_DEBUG=y
+# CONFIG_SND_DEBUG is not set
 CONFIG_SND_VMASTER=y
 CONFIG_SND_RAWMIDI_SEQ=m
 CONFIG_SND_OPL3_LIB_SEQ=m
@@ -3271,7 +3250,7 @@
 CONFIG_AC97_BUS=m
 CONFIG_HID_SUPPORT=y
 CONFIG_HID=y
-CONFIG_HID_DEBUG=y
+# CONFIG_HID_DEBUG is not set
 CONFIG_HIDRAW=y
 
 #
@@ -3450,7 +3429,7 @@
 CONFIG_USB_SERIAL_OPTION=m
 CONFIG_USB_SERIAL_OMNINET=m
 CONFIG_USB_SERIAL_OPTICON=m
-CONFIG_USB_SERIAL_DEBUG=m
+# CONFIG_USB_SERIAL_DEBUG is not set
 
 #
 # USB Miscellaneous drivers
@@ -3579,7 +3558,7 @@
 CONFIG_INFINIBAND_IPOIB=m
 CONFIG_INFINIBAND_IPOIB_CM=y
 CONFIG_INFINIBAND_IPOIB_DEBUG=y
-CONFIG_INFINIBAND_IPOIB_DEBUG_DATA=y
+# CONFIG_INFINIBAND_IPOIB_DEBUG_DATA is not set
 CONFIG_INFINIBAND_SRP=m
 CONFIG_INFINIBAND_ISER=m
 CONFIG_EDAC=y
@@ -3689,7 +3668,7 @@
 #
 CONFIG_XEN_BALLOON=y
 CONFIG_XEN_SCRUB_PAGES=y
-CONFIG_XEN_DEV_EVTCHN=m
+CONFIG_XEN_DEV_EVTCHN=y
 CONFIG_XEN_BACKEND=y
 CONFIG_XEN_BLKDEV_BACKEND=y
 CONFIG_XEN_BLKDEV_TAP=m
@@ -3813,7 +3792,7 @@
 CONFIG_JBD=y
 # CONFIG_JBD_DEBUG is not set
 CONFIG_JBD2=y
-CONFIG_JBD2_DEBUG=y
+# CONFIG_JBD2_DEBUG is not set
 CONFIG_FS_MBCACHE=y
 CONFIG_REISERFS_FS=m
 # CONFIG_REISERFS_CHECK is not set
@@ -4063,7 +4042,7 @@
 CONFIG_NLS_KOI8_U=m
 CONFIG_NLS_UTF8=m
 CONFIG_DLM=m
-CONFIG_DLM_DEBUG=y
+# CONFIG_DLM_DEBUG is not set
 
 #
 # Kernel hacking
@@ -4077,67 +4056,19 @@
 CONFIG_UNUSED_SYMBOLS=y
 CONFIG_DEBUG_FS=y
 CONFIG_HEADERS_CHECK=y
-CONFIG_DEBUG_KERNEL=y
-CONFIG_DEBUG_SHIRQ=y
-CONFIG_DETECT_SOFTLOCKUP=y
-# CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC is not set
-CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC_VALUE=0
-CONFIG_DETECT_HUNG_TASK=y
-# CONFIG_BOOTPARAM_HUNG_TASK_PANIC is not set
-CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE=0
+# CONFIG_DEBUG_KERNEL is not set
 CONFIG_SCHED_DEBUG=y
 CONFIG_SCHEDSTATS=y
-CONFIG_TIMER_STATS=y
-CONFIG_DEBUG_OBJECTS=y
-# CONFIG_DEBUG_OBJECTS_SELFTEST is not set
-CONFIG_DEBUG_OBJECTS_FREE=y
-CONFIG_DEBUG_OBJECTS_TIMERS=y
-CONFIG_DEBUG_OBJECTS_ENABLE_DEFAULT=1
-CONFIG_SLUB_DEBUG_ON=y
+# CONFIG_SLUB_DEBUG_ON is not set
 # CONFIG_SLUB_STATS is not set
-# CONFIG_DEBUG_KMEMLEAK is not set
-CONFIG_DEBUG_RT_MUTEXES=y
-CONFIG_DEBUG_PI_LIST=y
-# CONFIG_RT_MUTEX_TESTER is not set
-CONFIG_DEBUG_SPINLOCK=y
-CONFIG_DEBUG_MUTEXES=y
-CONFIG_DEBUG_LOCK_ALLOC=y
-CONFIG_PROVE_LOCKING=y
-CONFIG_LOCKDEP=y
-CONFIG_LOCK_STAT=y
-# CONFIG_DEBUG_LOCKDEP is not set
-CONFIG_TRACE_IRQFLAGS=y
-CONFIG_DEBUG_SPINLOCK_SLEEP=y
-# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
 CONFIG_STACKTRACE=y
-# CONFIG_DEBUG_KOBJECT is not set
 CONFIG_DEBUG_BUGVERBOSE=y
-CONFIG_DEBUG_INFO=y
-CONFIG_DEBUG_VM=y
-# CONFIG_DEBUG_VIRTUAL is not set
-CONFIG_DEBUG_WRITECOUNT=y
 CONFIG_DEBUG_MEMORY_INIT=y
-CONFIG_DEBUG_LIST=y
-CONFIG_DEBUG_SG=y
-CONFIG_DEBUG_NOTIFIERS=y
 CONFIG_ARCH_WANT_FRAME_POINTERS=y
 CONFIG_FRAME_POINTER=y
-CONFIG_BOOT_PRINTK_DELAY=y
-# CONFIG_RCU_TORTURE_TEST is not set
 # CONFIG_RCU_CPU_STALL_DETECTOR is not set
-# CONFIG_KPROBES_SANITY_TEST is not set
-# CONFIG_BACKTRACE_SELF_TEST is not set
-# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
-# CONFIG_LKDTM is not set
-CONFIG_FAULT_INJECTION=y
-CONFIG_FAILSLAB=y
-CONFIG_FAIL_PAGE_ALLOC=y
-CONFIG_FAIL_MAKE_REQUEST=y
-# CONFIG_FAIL_IO_TIMEOUT is not set
-CONFIG_FAULT_INJECTION_DEBUG_FS=y
 CONFIG_LATENCYTOP=y
 CONFIG_SYSCTL_SYSCALL_CHECK=y
-# CONFIG_DEBUG_PAGEALLOC is not set
 CONFIG_USER_STACKTRACE_SUPPORT=y
 CONFIG_NOP_TRACER=y
 CONFIG_HAVE_FTRACE_NMI_ENTER=y
@@ -4182,27 +4113,15 @@
 CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
 # CONFIG_FIREWIRE_OHCI_REMOTE_DMA is not set
 CONFIG_BUILD_DOCSRC=y
-CONFIG_DYNAMIC_DEBUG=y
-CONFIG_DMA_API_DEBUG=y
+# CONFIG_DYNAMIC_DEBUG is not set
+# CONFIG_DMA_API_DEBUG is not set
 # CONFIG_SAMPLES is not set
 CONFIG_HAVE_ARCH_KGDB=y
-CONFIG_KGDB=y
-CONFIG_KGDB_SERIAL_CONSOLE=y
-CONFIG_KGDB_TESTS=y
-# CONFIG_KGDB_TESTS_ON_BOOT is not set
 CONFIG_HAVE_ARCH_KMEMCHECK=y
 CONFIG_STRICT_DEVMEM=y
 # CONFIG_X86_VERBOSE_BOOTUP is not set
 CONFIG_EARLY_PRINTK=y
 CONFIG_EARLY_PRINTK_DBGP=y
-CONFIG_DEBUG_STACKOVERFLOW=y
-CONFIG_DEBUG_STACK_USAGE=y
-# CONFIG_DEBUG_PER_CPU_MAPS is not set
-CONFIG_X86_PTDUMP=y
-CONFIG_DEBUG_RODATA=y
-CONFIG_DEBUG_RODATA_TEST=y
-CONFIG_DEBUG_NX_TEST=m
-# CONFIG_IOMMU_DEBUG is not set
 # CONFIG_IOMMU_STRESS is not set
 CONFIG_HAVE_MMIOTRACE_SUPPORT=y
 CONFIG_IO_DELAY_TYPE_0X80=0
@@ -4214,15 +4133,13 @@
 # CONFIG_IO_DELAY_UDELAY is not set
 # CONFIG_IO_DELAY_NONE is not set
 CONFIG_DEFAULT_IO_DELAY_TYPE=0
-CONFIG_DEBUG_BOOT_PARAMS=y
-# CONFIG_CPA_DEBUG is not set
 CONFIG_OPTIMIZE_INLINING=y
 
 #
 # Security options
 #
 CONFIG_KEYS=y
-CONFIG_KEYS_DEBUG_PROC_KEYS=y
+# CONFIG_KEYS_DEBUG_PROC_KEYS is not set
 CONFIG_SECURITY=y
 CONFIG_SECURITYFS=y
 CONFIG_SECURITY_NETWORK=y


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