Speeding Up The Linux Kernel With Transparent Hugepage Support

[toplinuxsir]

Thanks !

toplinuxsir,

Try the #32 patch found here

http://www.kernel.org/pub/linux/kern...ugepage-32.bz2

Great ! Thanks , it works !

[toplinuxsir]

How to confirm that transparetn hugepages is enabled ?

toplinuxsir,

Try the #32 patch found here

http://www.kernel.org/pub/linux/kern...ugepage-32.bz2

I download the #32patch and the problems is resolved , Thanks a lot !
and complied the new kernel with #32 patch successfully .
But how to confirm that transparent hugepages is enabled ?

Thanks !

[Obscene_CNN]

try doing a cat /proc/meminfo

[evolution]

Does this patch works with 2.6.36? First time I tried it (when it was released), it didn't apply to my 2.6.36.2 kernel...
I'd like to try it with my "customized patchset" kernel... (PF + BFS testing features not present in CK).

Cheers

[toplinuxsir]

Is the transparent hugepages enabled ?

try doing a cat /proc/meminfo

$ cat /proc/meminfo
MemTotal: 1984200 kB
MemFree: 1637484 kB
Buffers: 24416 kB
Cached: 153768 kB
SwapCached: 0 kB
Active: 128940 kB
Inactive: 154336 kB
Active(anon): 105440 kB
Inactive(anon): 2856 kB
Active(file): 23500 kB
Inactive(file): 151480 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 2096124 kB
SwapFree: 2096124 kB
Dirty: 480 kB
Writeback: 0 kB
AnonPages: 105236 kB
Mapped: 51972 kB
Shmem: 3156 kB
Slab: 23200 kB
SReclaimable: 10980 kB
SUnreclaim: 12220 kB
KernelStack: 1584 kB
PageTables: 9728 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 3088224 kB
Committed_AS: 328232 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 308324 kB
VmallocChunk: 34359410684 kB
HardwareCorrupted: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 28672 kB
DirectMap2M: 1994752 kB

Is it Enabled ?

[Obscene_CNN]

$ cat /proc/meminfo


DirectMap2M: 1994752 kB

Is it Enabled ?

looks that way

I don't know why I didn't think of it before but this is a better way to see if it is enabled.

cat /sys/kernel/mm/transparent_hugepage/enabled

[Obscene_CNN]

Does this patch works with 2.6.36? First time I tried it (when it was released), it didn't apply to my 2.6.36.2 kernel...
I'd like to try it with my "customized patchset" kernel... (PF + BFS testing features not present in CK).

Cheers

you could try an older patch like #31

http://www.kernel.org/pub/linux/kernel/people/andrea/patches/v2.6/2.6.36-rc7/

[Obscene_CNN]

Transparent Hugepage Support patch #33 is out!

It applies to kernel 2.6.37-rc5. I think its a little faster but it may just be due to video driver updates from previous kernel release candidates

http://www.kernel.org/pub/linux/kernel/people/andrea/patches/v2.6/2.6.37-rc5/transparent_hugepage-33.bz2

[toplinuxsir]

In my os there is no /sys/kernel/mm/transparent_hugepage

looks that way

I don't know why I didn't think of it before but this is a better way to see if it is enabled.

cat /sys/kernel/mm/transparent_hugepage/enabled

I compiled kernel 2.6.37.rc4 with patch transparent_huge_page.32
But In my system there is no directory /sys/kernel/mm/transparent_hugepage

how to enable transparent_hugepages ?

[Obscene_CNN]

I compiled kernel 2.6.37.rc4 with patch transparent_huge_page.32
But In my system there is no directory /sys/kernel/mm/transparent_hugepage

how to enable transparent_hugepages ?

toplinuxsir,

Did you enable the support in your config before you compiled it?