[Xen-devel] Re: [Xen-users] [HOWTO] Running Xen 4.0 host (dom0) with Redhat Enterprise Linux 6 (RHEL6)

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Fri, Nov 19, 2010 at 12:08:30PM -0500, Digimer wrote:
> On 11/18/2010 03:39 PM, Pasi Kärkkäinen wrote:
>> Note the kernel reference .config has debugging stuff enabled,
>> so that will slow down dom0.
>>
>> -- Pasi
>
> With regard to this;
>
> I've been hoping to create a set of updated KVM vs. Xen benchmarks as  
> I've seen this asked for of late and existing data is >3 years old.
>
> I would like to get the kernel setup relatively similarly to how it will  
> be setup if/when an RPM is provided for RHEL 6.
>
> These are the DEBUG entries I found in .config from your tutorial. Which  
> are reasonable to set to n/m or just comment out? Did I miss anything  
> else I should change? Again, I'm not looking to optimize, just to get  
> closer to what the final generally available kernel will have.
>

Yeah, you should definitely disable the various DEBUG options
for performance benchmarking.

-- Pasi

> CONFIG_XEN_DEBUG_FS=y
> CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
> CONFIG_SLUB_DEBUG=y
> CONFIG_HAVE_DMA_API_DEBUG=y
> CONFIG_X86_DEBUGCTLMSR=y
> CONFIG_PM_DEBUG=y
> CONFIG_CPU_FREQ_DEBUG=y
> CONFIG_CFG80211_DEBUGFS=y
> CONFIG_MAC80211_DEBUGFS=y
> CONFIG_DEBUG_DEVRES=y
> CONFIG_DM_DEBUG=y
> CONFIG_FIREWIRE_OHCI_DEBUG=y
> CONFIG_MLX4_DEBUG=y
> CONFIG_LIBERTAS_DEBUG=y
> CONFIG_ATH5K_DEBUG=y
> CONFIG_IWLWIFI_DEBUG=y
> CONFIG_IWLWIFI_DEBUGFS=y
> CONFIG_RT2X00_LIB_DEBUGFS=y
> CONFIG_SND_DEBUG=y
> CONFIG_SND_PCM_XRUN_DEBUG=y
> CONFIG_INFINIBAND_MTHCA_DEBUG=y
> CONFIG_INFINIBAND_IPOIB_DEBUG=y
> CONFIG_INFINIBAND_IPOIB_DEBUG_DATA=y
> CONFIG_JBD2_DEBUG=y
> CONFIG_DLM_DEBUG=y
> CONFIG_DEBUG_FS=y
> CONFIG_DEBUG_KERNEL=y
> CONFIG_DEBUG_SHIRQ=y
> CONFIG_SCHED_DEBUG=y
> CONFIG_DEBUG_OBJECTS=y
> CONFIG_DEBUG_OBJECTS_FREE=y
> CONFIG_DEBUG_OBJECTS_TIMERS=y
> CONFIG_DEBUG_OBJECTS_ENABLE_DEFAULT=1
> CONFIG_SLUB_DEBUG_ON=y
> CONFIG_DEBUG_RT_MUTEXES=y
> CONFIG_DEBUG_PI_LIST=y
> CONFIG_DEBUG_SPINLOCK=y
> CONFIG_DEBUG_MUTEXES=y
> CONFIG_DEBUG_LOCK_ALLOC=y
> CONFIG_DEBUG_SPINLOCK_SLEEP=y
> CONFIG_DEBUG_BUGVERBOSE=y
> CONFIG_DEBUG_INFO=y
> CONFIG_DEBUG_VM=y
> CONFIG_DEBUG_WRITECOUNT=y
> CONFIG_DEBUG_MEMORY_INIT=y
> CONFIG_DEBUG_LIST=y
> CONFIG_DEBUG_SG=y
> CONFIG_DEBUG_NOTIFIERS=y
> CONFIG_FAULT_INJECTION_DEBUG_FS=y
> CONFIG_DYNAMIC_DEBUG=y
> CONFIG_DMA_API_DEBUG=y
> CONFIG_DEBUG_STACKOVERFLOW=y
> CONFIG_DEBUG_STACK_USAGE=y
> CONFIG_DEBUG_RODATA=y
> CONFIG_DEBUG_RODATA_TEST=y
> CONFIG_DEBUG_NX_TEST=m
> CONFIG_DEBUG_BOOT_PARAMS=y
> CONFIG_KEYS_DEBUG_PROC_KEYS=y
>
> I realize a bunch of these are for hardware that has little or nothing  
> to do with Xen.
>
> Thanks for any feedback.
>
> -- 
> Digimer
> E-Mail: digimer@xxxxxxxxxxx
> AN!Whitepapers: http://alteeve.com
> Node Assassin:  http://nodeassassin.org

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