2010/2/8 Rishikesh <risrajak@linux.vnet.ibm.com>

On 02/06/2010 09:04 PM, shenghui wrote:

Hi all,
 
       I want to know how to run hugetlbshmget03? Does it need some arguments?
For I have run it several times, always got error "NOMEM" for cannot get hugetlb
page. But "cat /proc/meminfo" shows that free hugetlb pages are enough for its
request.
       Does anyone know how to handle this problem?

Hi Shenghui,

Have you run this testcase after setting up nr_hugepages ? You need to set the pages accordingly and then you need to run the testcase.

e.g:

echo 10 > /proc/sys/vm/nr_hugepages

Please post your result if you still finding issue.

Thanks
Rishi

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Thanks and Best Regards,
shenghui

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Hi Rishi,

       Please refer to the following for my error info. And will you please try it on your workstation and send me
your result?

       Thanks!

===============================================================================

root@crossover-laptop:/home/crossover/repository/ltp-intermediate-20100119/testcases/kernel/mem/hugetlb/hugeshmget# ls
hugeshmget01    hugeshmget02    hugeshmget03    hugeshmget05    Makefile
hugeshmget01.c  hugeshmget02.c  hugeshmget03.c  hugeshmget05.c

root@crossover-laptop:/home/crossover/repository/ltp-intermediate-20100119/testcases/kernel/mem/hugetlb/hugeshmget# echo 10 > /proc/sys/vm/nr_hugepages

root@crossover-laptop:/home/crossover/repository/ltp-intermediate-20100119/testcases/kernel/mem/hugetlb/hugeshmget# cat /proc/meminfo
MemTotal:        4048440 kB
MemFree:         1576656 kB
Buffers:          122652 kB
Cached:          1487772 kB
SwapCached:            0 kB
Active:          1225860 kB
Inactive:        1043268 kB
Active(anon):     684228 kB
Inactive(anon):       16 kB
Active(file):     541632 kB
Inactive(file):  1043252 kB
Unevictable:           0 kB
Mlocked:               0 kB
HighTotal:       3211696 kB
HighFree:        1044060 kB
LowTotal:         836744 kB
LowFree:          532596 kB
SwapTotal:       3903752 kB
SwapFree:        3903752 kB
Dirty:               204 kB
Writeback:             0 kB
AnonPages:        658692 kB
Mapped:           239928 kB
Slab:             109460 kB
SReclaimable:      93676 kB
SUnreclaim:        15784 kB
PageTables:         8332 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     5917732 kB
Committed_AS:    1389392 kB
VmallocTotal:     122880 kB
VmallocUsed:       44644 kB
VmallocChunk:      75956 kB
HugePages_Total:      10
HugePages_Free:       10
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:        8184 kB
DirectMap2M:      903168 kB

root@crossover-laptop:/home/crossover/repository/ltp-intermediate-20100119/testcases/kernel/mem/hugetlb/hugeshmget# ./hugeshmget03
hugeshmget03    0  TINFO  :  errno = 12 : Cannot allocate memory
hugeshmget03    1  TBROK  :  Didn't get ENOSPC in test setup

root@crossover-laptop:/home/crossover/repository/ltp-intermediate-20100119/testcases/kernel/mem/hugetlb/hugeshmget# echo 32 > /proc/sys/vm/nr_hugepages

root@crossover-laptop:/home/crossover/repository/ltp-intermediate-20100119/testcases/kernel/mem/hugetlb/hugeshmget# ./hugeshmget03
hugeshmget03    0  TINFO  :  errno = 12 : Cannot allocate memory
hugeshmget03    1  TBROK  :  Didn't get ENOSPC in test setup


--


Thanks and Best Regards,
shenghui