I fixed the memory issue and the application is running but its not
allocating large pages.
$ hugectl --text --bss --data --heap --shm -v -v -v ./test 100000000
hugectl: INFO: HUGETLB_VERBOSE='5'
hugectl: INFO: LD_LIBRARY_PATH='/usr/lib32:/usr/lib64:'
hugectl: INFO: HUGETLB_ELFMAP='R:W'
hugectl: INFO: HUGETLB_MORECORE='yes'
hugectl: INFO: HUGETLB_SHM='yes'
hugectl: WARNING: LD_PRELOAD not appropriate for this map combination
libhugetlbfs [dmlb2000ts:15538]: INFO: Parsed kernel version: [2] . [6] . [30]
libhugetlbfs [dmlb2000ts:15538]: INFO: Feature private_reservations is
present in this kernel
libhugetlbfs [dmlb2000ts:15538]: INFO: HUGETLB_SHARE=0, sharing disabled
libhugetlbfs [dmlb2000ts:15538]: INFO: Segment 0 (phdr 2):
0x400000-0x4008bc (filesz=0x8bc) (prot = 0x5)
libhugetlbfs [dmlb2000ts:15538]: INFO: Segment 1 (phdr 3):
0x5008c0-0x80500af0 (filesz=0x220) (prot = 0x3)
libhugetlbfs [dmlb2000ts:15538]: WARNING: Layout problem with segments 0 and 1:
Segments would overlap
libhugetlbfs [dmlb2000ts:15538]: INFO: No segments were appropriate
for remapping
libhugetlbfs [dmlb2000ts:15538]: INFO: Kernel has MAP_PRIVATE
reservations. Disabling heap prefaulting.
libhugetlbfs [dmlb2000ts:15538]: INFO: setup_morecore(): heapaddr = 0x80e00000
0
So I'm guessing make check is supposed to be run as root? since there
seems to be mount commands and echoing stuff out to proc that is
performed.
I'd be nice if if you could just use some of the same checks in
libhugetlbfs.so to find a mount and see if you can mmap in it then run
the tests if you aren't root.
( as me )
********** TEST SUMMARY
* 2M
* 32-bit 64-bit
* Total testcases: 0 98
* Skipped: 0 0
* PASS: 0 68
* FAIL: 0 5
* Killed by signal: 0 0
* Bad configuration: 0 11
* Expected FAIL: 0 0
* Unexpected PASS: 0 0
* Strange test result: 0 14
**********
( as root )
********** TEST SUMMARY
* 2M
* 32-bit 64-bit
* Total testcases: 0 98
* Skipped: 0 0
* PASS: 0 81
* FAIL: 0 0
* Killed by signal: 0 0
* Bad configuration: 0 3
* Expected FAIL: 0 0
* Unexpected PASS: 0 0
* Strange test result: 0 14
**********
Hmmm, not sure what tests were what do you want the full output?
Thanks,
- David Brown
On Wed, Jun 24, 2009 at 9:09 PM, David
Gibson<da...@gibson.dropbear.id.au> wrote:
> On Thu, Jun 25, 2009 at 03:50:14AM +0000, David Brown wrote:
>> I've been playing around with large pages and libhugetlbfs and have
>> been having no such luck getting my code segment to be backed by large
>> pages.
>>
>> I have a small example code that doesn't seem to be loading.
>
> First, does the libhugetlbfs pass ("make check").
>
> [snip]
>> $ hugectl -v -v --text --bss --heap --shm --data ./test 10000000
>> hugectl: INFO: HUGETLB_VERBOSE='4'
>> hugectl: INFO: LD_LIBRARY_PATH='/usr/local/lib:/usr/local/lib64:'
>> hugectl: INFO: HUGETLB_ELFMAP='R:W'
>> hugectl: INFO: HUGETLB_MORECORE='yes'
>> hugectl: INFO: HUGETLB_SHM='yes'
>> hugectl: WARNING: LD_PRELOAD not appropriate for this map combination
>> libhugetlbfs [uber-gamer:31047]: INFO: Parsed kernel version: [2] . [6] .
>> [30]
>> libhugetlbfs [uber-gamer:31047]: INFO: Feature private_reservations is
>> present in this kernel
>> libhugetlbfs [uber-gamer:31047]: INFO: Kernel has MAP_PRIVATE
>> reservations. Disabling heap prefaulting.
>> libhugetlbfs [uber-gamer:31047]: INFO: HUGETLB_SHARE=0, sharing disabled
>> libhugetlbfs [uber-gamer:31047]: INFO: Segment 0 (phdr 2):
>> 0x400000-0x40089c (filesz=0x89c) (prot = 0x5)
>> libhugetlbfs [uber-gamer:31047]: INFO: Segment 1 (phdr 3):
>> 0x8008a0-0x40800ae0 (filesz=0x220) (prot = 0x3)
>> libhugetlbfs [uber-gamer:31047]: INFO: libhugetlbfs version: 2.4
>> libhugetlbfs [uber-gamer:31048]: INFO: Mapped hugeseg at
>> 0x2aaaaac00000. Copying 0x89c bytes and 0 extra bytes from
>> 0x400000...done
>> libhugetlbfs [uber-gamer:31047]: INFO: Prepare succeeded
>> libhugetlbfs [uber-gamer:31049]: WARNING: Unable to verify address
>> range 0x800000 - 0x800000. Not empty?
>> libhugetlbfs [uber-gamer:31049]: INFO: Mapped hugeseg at
>> 0x2aaaaac00000. Copying 0x220 bytes and 0 extra bytes from
>> 0x8008a0...done
>> libhugetlbfs [uber-gamer:31047]: INFO: Prepare succeeded
>> Failed to map hugepage segment 1: 800000-40a00000 (errno=12)
>> Aborted
>
> errno 12 is ENOMEM. This suggests you don't have enough hugepages
> allocated to back the program's segments.
>
> --
> David Gibson | I'll have my music baroque, and my code
> david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
> | _way_ _around_!
> http://www.ozlabs.org/~dgibson
>
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