[LTP] LTP: readahead02 failed

[LTP] LTP: readahead02 failed

[Naresh Kamboju]

Hi Team,

readahead02 failed on HiKey board with below error message.
1. Any minimal limitation of Buffers size or Cached size should have
to pass this test case ?  if yes we would change test logic to detect
and skip test run.
2. The first FAIL message is not giving enough information (*) there
is a room for improvement here.
3.  strace output show Invalid argument for readahead()

readahead(3, 0, 67108864)               = -1 EINVAL (Invalid argument)
write(1, "readahead02    1  TFAIL  :  read"..., 100readahead02    1
TFAIL  :  readahead02.c:86: unexpected failure - returned value = -1,
expected: 0
) = 100

The man page have explanation of EINVAL is
EINVAL fd  does  not  refer  to a file type to which readahead() can be applied.

Test output:
-----------------
readahead02    0  TINFO  :  creating test file of size: 67108864
readahead02    0  TINFO  :  read_testfile(0)
readahead02    0  TINFO  :  read_testfile(1)
readahead02    1  TFAIL  :  readahead02.c:86: unexpected failure -
returned value = -1, expected: 0 (*)
readahead02    0  TINFO  :  readahead calls made: 0
readahead02    2  TPASS  :  offset is still at 0 as expected
readahead02    0  TINFO  :  read_testfile(0) took: 124831 usec
readahead02    0  TINFO  :  read_testfile(1) took: 124712 usec
readahead02    0  TINFO  :  read_testfile(0) read: 0 bytes
readahead02    0  TINFO  :  read_testfile(1) read: 0 bytes
readahead02    3  TFAIL  :  readahead02.c:333: readahead failed to save any I/O
readahead02    0  TINFO  :  cache can hold at least: 19068 kB
readahead02    0  TINFO  :  read_testfile(0) used cache: 0 kB
readahead02    0  TINFO  :  read_testfile(1) used cache: 0 kB
readahead02    4  TCONF  :  readahead02.c:354: Page cache on your
system is too small to hold whole testfile.

Meminfo
------------
root@hikey:~# cat /proc/meminfo
MemTotal:        1922076 kB
MemFree:         1736568 kB
MemAvailable:    1780900 kB
Buffers:            5272 kB
Cached:            92676 kB
SwapCached:            0 kB
Active:            30416 kB
Inactive:          83260 kB
Active(anon):      16244 kB
Inactive(anon):     8348 kB
Active(file):      14172 kB
Inactive(file):    74912 kB
Unevictable:           0 kB
Mlocked:               0 kB
SwapTotal:             0 kB
SwapFree:              0 kB
Dirty:                84 kB
Writeback:             0 kB
AnonPages:         15832 kB
Mapped:            21860 kB
Shmem:              8828 kB
Slab:              45048 kB
SReclaimable:      23132 kB
SUnreclaim:        21916 kB
KernelStack:        3056 kB
PageTables:          660 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:      961036 kB
Committed_AS:     153972 kB
VmallocTotal:   258867136 kB
VmallocUsed:           0 kB
VmallocChunk:          0 kB
AnonHugePages:      6144 kB
CmaTotal:          65536 kB
CmaFree:           59036 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB

Linux kernel Version:
----------------------------
Linux Version is 4.11.0-next-20170512, #1 SMP PREEMPT Fri May 12
03:26:58 UTC 2017

Thank you.

Best regards
Naresh Kamboju

[LTP] LTP: readahead02 failed

[Jan Stancek]

----- Original Message -----
> Hi Team,
> 
> readahead02 failed on HiKey board with below error message.
> 1. Any minimal limitation of Buffers size or Cached size should have
> to pass this test case ?  if yes we would change test logic to detect
> and skip test run.

Hi,

Your system appears to have plenty of memory for this test.

> 2. The first FAIL message is not giving enough information (*) there
> is a room for improvement here.

I pushed a patch to include errno code in failure message.

> 3.  strace output show Invalid argument for readahead()
> 
> readahead(3, 0, 67108864)               = -1 EINVAL (Invalid argument)
> write(1, "readahead02    1  TFAIL  :  read"..., 100readahead02    1
> TFAIL  :  readahead02.c:86: unexpected failure - returned value = -1,
> expected: 0
> ) = 100
> 
> The man page have explanation of EINVAL is
> EINVAL fd  does  not  refer  to a file type to which readahead() can be
> applied.

Have you run into this with any of previous kernels?

What filesystem is /tmp? Is it tmpfs?

Can you try with LTP tmpdir backed by different fs?
For example: env TMPDIR=/root/ ./readahead02

Regards,
Jan

[LTP] LTP: readahead02 failed

[Naresh Kamboju]

Hi Jan,

On 15 May 2017 at 12:52, Jan Stancek <jstancek@redhat.com> wrote:
>
> ----- Original Message -----
>> Hi Team,
>>
>> readahead02 failed on HiKey board with below error message.
>> 1. Any minimal limitation of Buffers size or Cached size should have
>> to pass this test case ?  if yes we would change test logic to detect
>> and skip test run.
>
> Hi,
>
> Your system appears to have plenty of memory for this test.
>
>> 2. The first FAIL message is not giving enough information (*) there
>> is a room for improvement here.
>
> I pushed a patch to include errno code in failure message.
>
>> 3.  strace output show Invalid argument for readahead()
>>
>> readahead(3, 0, 67108864)               = -1 EINVAL (Invalid argument)
>> write(1, "readahead02    1  TFAIL  :  read"..., 100readahead02    1
>> TFAIL  :  readahead02.c:86: unexpected failure - returned value = -1,
>> expected: 0
>> ) = 100
>>
>> The man page have explanation of EINVAL is
>> EINVAL fd  does  not  refer  to a file type to which readahead() can be
>> applied.
>
> Have you run into this with any of previous kernels?
>
> What filesystem is /tmp? Is it tmpfs?

root@hikey:/opt/ltp/testcases/bin# mount | grep /tmp
tmpfs on /tmp type tmpfs (rw)

root@hikey:/opt/ltp/testcases/bin# cat /proc/filesystems | grep tmpfs
nodev   tmpfs
nodev   devtmpfs

>
> Can you try with LTP tmpdir backed by different fs?
> For example: env TMPDIR=/root/ ./readahead02

The  "/" root filesystem mounted type as ext4.
/dev/mmcblk0p9 on / type ext4 (rw,relatime,data=ordered)

By changing the TMPDIR environment variable, the test case
"readahead02" got pass. Thanks :)

root@hikey:/opt/ltp/testcases/bin# env TMPDIR=/home/root/
./readahead02
readahead02    0  TINFO  :  creating test file of size: 67108864
[ 4115.161936] readahead02 (2633): drop_caches: 1
readahead02    0  TINFO  :  read_testfile(0)
[ 4117.074675] readahead02 (2633): drop_caches: 1
readahead02    0  TINFO  :  read_testfile(1)
readahead02    0  TINFO  :  max ra estimate: 249856
readahead02    0  TINFO  :  readahead calls made: 269
readahead02    1  TPASS  :  offset is still at 0 as expected
readahead02    0  TINFO  :  read_testfile(0) took: 1644675 usec
readahead02    0  TINFO  :  read_testfile(1) took: 2239703 usec
readahead02    0  TINFO  :  read_testfile(0) read: 67072000 bytes
readahead02    0  TINFO  :  read_testfile(1) read: 31821824 bytes
readahead02    2  TPASS  :  readahead saved some I/O
readahead02    0  TINFO  :  cache can hold at least: 65824 kB
readahead02    0  TINFO  :  read_testfile(0) used cache: 65520 kB
readahead02    0  TINFO  :  read_testfile(1) used cache: 34420 kB
readahead02    3  TPASS  :  using cache as expected


Thank you.

Best regards
Naresh Kamboju

>
> Regards,
> Jan