[LTP] How to run only a specific test series like for example IPC?

[LTP] How to run only a specific test series like for example IPC?

[Sedat Dilek]

Hi,

I wanted to only run the IPC tests as I have troubles with IPC(-MSG)
in Linux-Next.

This is what I did...

root# cd /opt/ltp/

root# ./runltp ./runtest/ipc

...is that the correct way? Wrong?

Unfortunately, this fails due to EXT4-fs troubles...
...
mke2fs 1.42 (29-Nov-2011)
Filesystem label=
OS type: Linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
Stride=0 blocks, Stripe width=0 blocks
32 inodes, 236 blocks
11 blocks (4.66%) reserved for the super user
First data block=1
1 block group
8192 blocks per group, 8192 fragments per group
32 inodes per group

Allocating group tables: done
Writing inode tables: done

Filesystem too small for a journal <--- ???
Writing superblocks and filesystem accounting information: mount:
/dev/loop1 already mounted or /tmp/ltp-p5uaFntNJE/mnt_pnt.u44xDV busy
FATAL: can't mount block device /dev/loop1.
root@fambox:/opt/ltp# done

10240+0 records in
10240+0 records out
10240000 bytes (10 MB) copied, 0.260004 s, 39.4 MB/s
^C

root# dmesg | tail

[   78.095907] EXT4-fs (loop1): VFS: Can't find ext4 filesystem <--- ???

root# grep -i ext4 /boot/config-$(uname -r)
CONFIG_EXT4_FS=y
CONFIG_EXT4_FS_POSIX_ACL=y
CONFIG_EXT4_FS_SECURITY=y
# CONFIG_EXT4_DEBUG is not set

IMPORTANT NOTE: Here, I am running Ubuntu/precise as a WUBI installation.

Regards,
- Sedat -

[1] https://wiki.ubuntu.com/WubiGuide

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Re: [LTP] How to run only a specific test series like for example IPC?

[Carlos Hernandez]

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On 06/23/2013 09:09 AM, Sedat Dilek wrote:
> Hi,
>
> I wanted to only run the IPC tests as I have troubles with IPC(-MSG)
> in Linux-Next.
>
> This is what I did...
>
> root# cd/opt/ltp/
>
> root# ./runltp ./runtest/ipc
>
> ...is that the correct way? Wrong?
./runltp -f ipc  should work

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Re: [LTP] How to run only a specific test series like for example IPC?

[chrubis]

Hi!
> I wanted to only run the IPC tests as I have troubles with IPC(-MSG)
> in Linux-Next.
> 
> This is what I did...
> 
> root# cd /opt/ltp/
> 
> root# ./runltp ./runtest/ipc
> 
> ...is that the correct way? Wrong?

I belive that the syntax is ./runltp -f ipc

Also there are additional tests for POSIX IPC in open_posix_testsuite
that are not executed by the runltp script.

> Unfortunately, this fails due to EXT4-fs troubles...
> ...
> mke2fs 1.42 (29-Nov-2011)
> Filesystem label=
> OS type: Linux
> Block size=1024 (log=0)
> Fragment size=1024 (log=0)
> Stride=0 blocks, Stripe width=0 blocks
> 32 inodes, 236 blocks
> 11 blocks (4.66%) reserved for the super user
> First data block=1
> 1 block group
> 8192 blocks per group, 8192 fragments per group
> 32 inodes per group
> 
> Allocating group tables: done
> Writing inode tables: done
> 
> Filesystem too small for a journal <--- ???
> Writing superblocks and filesystem accounting information: mount:
> /dev/loop1 already mounted or /tmp/ltp-p5uaFntNJE/mnt_pnt.u44xDV busy
> FATAL: can't mount block device /dev/loop1.
> root@fambox:/opt/ltp# done

There are certain testcases that needs a separate filesystem partition
to play with, if you don't pass physical disk partition to the runtest
script a loopback device is created, formatted and mounted.

> 10240+0 records in
> 10240+0 records out
> 10240000 bytes (10 MB) copied, 0.260004 s, 39.4 MB/s
> ^C
> 
> root# dmesg | tail
> 
> [   78.095907] EXT4-fs (loop1): VFS: Can't find ext4 filesystem <--- ???

This simply looks like the 10MB image is not enough for the ext4 journal
for some reason.

Try following patch that increases the size to 100MB.

diff --git a/runltp b/runltp
index a8bf404..7955f44 100755
--- a/runltp
+++ b/runltp
@@ -984,7 +984,7 @@ main()
 create_block()
 {
     #create a block device with ext4 filesystem.
-    dd if=/dev/zero of=${TMP}/test.img bs=1kB count=10240 &>/dev/null
+    dd if=/dev/zero of=${TMP}/test.img bs=1kB count=102400 &>/dev/null
     if [ $? -ne 0 ]; then
         echo "Failed to create loopback device image, please check disk space and re-run"
         return 1
-- 
Cyril Hrubis
chrubis@suse.cz

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Re: [LTP] How to run only a specific test series like for example IPC?

[chrubis]

Hi!
> > There are certain testcases that needs a separate filesystem partition
> > to play with, if you don't pass physical disk partition to the runtest
> > script a loopback device is created, formatted and mounted.
> >
> >> 10240+0 records in
> >> 10240+0 records out
> >> 10240000 bytes (10 MB) copied, 0.260004 s, 39.4 MB/s
> >> ^C
> >>
> >> root# dmesg | tail
> >>
> >> [   78.095907] EXT4-fs (loop1): VFS: Can't find ext4 filesystem <--- ???
> >
> > This simply looks like the 10MB image is not enough for the ext4 journal
> > for some reason.
> >
> > Try following patch that increases the size to 100MB.
> >
> > diff --git a/runltp b/runltp
> > index a8bf404..7955f44 100755
> > --- a/runltp
> > +++ b/runltp
> > @@ -984,7 +984,7 @@ main()
> >  create_block()
> >  {
> >      #create a block device with ext4 filesystem.
> > -    dd if=/dev/zero of=${TMP}/test.img bs=1kB count=10240 &>/dev/null
> > +    dd if=/dev/zero of=${TMP}/test.img bs=1kB count=102400 &>/dev/null
> >      if [ $? -ne 0 ]; then
> >          echo "Failed to create loopback device image, please check disk space and re-run"
> >          return 1
> > --
> 
> Hmm, that did not help.

What was the error message, same as previous?

> How much disc-space someone need on the partition where LTP resides
> (where the tests are performed)?

Not much, I do not know the precise number but about gigabyte should be
enough (and far less when you omit aio and fs stress tests).

> $ LANG=C LC_ALL=C df -T
> Filesystem     Type     1K-blocks      Used Available Use% Mounted on
> rootfs         rootfs    17753424  12825524   4003024  77% /
> udev           devtmpfs   1960968         4   1960964   1% /dev
> tmpfs          tmpfs       788020       888    787132   1% /run
> /dev/sda2      fuseblk  465546236 107358584 358187652  24% /host
> /dev/loop0     ext4      17753424  12825524   4003024  77% /
> none           tmpfs         5120         0      5120   0% /run/lock
> none           tmpfs      1970048       156   1969892   1% /run/shm
> 
> Can I use a different partition where I have more disc-space available?

LTP uses TMPDIR env variable for that (and defaults to /tmp/ when TMPDIR
is not set).

-- 
Cyril Hrubis
chrubis@suse.cz

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Re: [LTP] How to run only a specific test series like for example IPC?

[chrubis]

Hi!
> >
> > What was the error message, same as previous?
> >
> 
> Here we go.
> 
> ...
> mount: wrong fs type, bad option, bad superblock on /dev/loop1,
>        missing codepage or helper program, or other error
>        In some cases useful info is found in syslog - try
>        dmesg | tail  or so
> 
> FATAL: can't mount block device /dev/loop1.
> mke2fs 1.42 (29-Nov-2011)
> mkfs.ext4: Device size reported to be zero.  Invalid partition specified, or
>         partition table wasn't reread after running fdisk, due to
>         a modified partition being busy and in use.  You may need to reboot
>         to re-read your partition table.
> 
> 102400+0 records in
> 102400+0 records out
> 102400000 bytes (102 MB) copied, 0.542412 s, 189 MB/s
> ...
> 
> # dmesg | tail
> ...
> [ 1179.820940] EXT4-fs (loop1): VFS: Can't find ext4 filesystem

Hmm, it seems like something went wrong with the loop device setup (as
if no device was attached but the error was silently ignored).

(And I wonder why the messages seems to be in reverse order, the
messages from dd should have been first, then mkfs and then mount).

Could you try again without the &> /dev/null redirection and report
if there is error in the losetup step?

Also what is output of the 'losetup -a' added right before the mkfs
command?

diff --git a/runltp b/runltp
index a8bf404..1e9e637 100755
--- a/runltp
+++ b/runltp
@@ -996,12 +996,13 @@ create_block()
             return 1
         else
             ##attach the created file to loop dev.
-            losetup $LOOP_DEV ${TMP}/test.img &>/dev/null
+            losetup $LOOP_DEV ${TMP}/test.img
             if [ $? -ne 0 ]; then
                 echo "losetup failed to create block device"
                 return 1
             else
-                mkfs.ext4 $LOOP_DEV &>/dev/null
+                losetup -a
+		mkfs.ext4 $LOOP_DEV &>/dev/null
                 [ $? -ne 0 ] && (echo "creating a ext4 block device failed" && return 1)
                 #set the values in alltests which require block device.
                 DEVICE=$LOOP_DEV
-- 
Cyril Hrubis
chrubis@suse.cz

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Re: [LTP] How to run only a specific test series like for example IPC?

[chrubis]

Hi!
> > >
> > > What was the error message, same as previous?
> > >
> > 
> > Here we go.
> > 
> > ...
> > mount: wrong fs type, bad option, bad superblock on /dev/loop1,
> >        missing codepage or helper program, or other error
> >        In some cases useful info is found in syslog - try
> >        dmesg | tail  or so
> > 
> > FATAL: can't mount block device /dev/loop1.
> > mke2fs 1.42 (29-Nov-2011)
> > mkfs.ext4: Device size reported to be zero.  Invalid partition specified, or
> >         partition table wasn't reread after running fdisk, due to
> >         a modified partition being busy and in use.  You may need to reboot
> >         to re-read your partition table.
> > 
> > 102400+0 records in
> > 102400+0 records out
> > 102400000 bytes (102 MB) copied, 0.542412 s, 189 MB/s
> > ...
> > 
> > # dmesg | tail
> > ...
> > [ 1179.820940] EXT4-fs (loop1): VFS: Can't find ext4 filesystem
> 
> Hmm, it seems like something went wrong with the loop device setup (as
> if no device was attached but the error was silently ignored).
> 
> (And I wonder why the messages seems to be in reverse order, the
> messages from dd should have been first, then mkfs and then mount).

Hmm, if I remeber correctly there dash that is used as /bin/sh on Debian
(and supposedly on Ubuntu) that does not understand the &> syntax so the
messages may be reversed because the commands are executed on background
(instead of the output redirected to /dev/null).

Try to remove all '&> /dev/null' from the script and try again.

-- 
Cyril Hrubis
chrubis@suse.cz

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Re: [LTP] How to run only a specific test series like for example IPC?

[chrubis]

Hi!
> >> Hmm, if I remeber correctly there dash that is used as /bin/sh on Debian
> >> (and supposedly on Ubuntu) that does not understand the &> syntax so the
> >> messages may be reversed because the commands are executed on background
> >> (instead of the output redirected to /dev/null).
> >>
> >
> > Yeah, dash is default.
> > I try with using bash instead.
> >
> 
> YUPP, that worked :-).
> 

I will fix the script to work with dash and commit the fix to git.

Thanks for the testing.

-- 
Cyril Hrubis
chrubis@suse.cz

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Re: [LTP] How to run only a specific test series like for example IPC?

[chrubis]

Hi!
> More aarghs.
> Real diff attached.

Next time you send a patch please make use of 'git format-patch' so that
it could be applied directly with 'git am'.

-- 
Cyril Hrubis
chrubis@suse.cz

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Re: [LTP] How to run only a specific test series like for example IPC?

[chrubis]

Hi!
> # LC_ALL=C ls -l /tmp/ltp-* /tmp/ltp-*/mnt_pnt.* /tmp/ltp-*/*.img
> ls: cannot access /tmp/ltp-*: No such file or directory
> ls: cannot access /tmp/ltp-*/mnt_pnt.*: No such file or directory
> ls: cannot access /tmp/ltp-*/*.img: No such file or directory
> 
> # egrep -nr -i 'xxx|mnt_pnt' runltp
> 506:    export TMPTEMPLATE="${TMPBASE}/ltp-XXXXXXXXXX"
> 706:        mnt_pnt=`mktemp -d "${TMP}/mnt_pnt.XXXXXX"`
> 708:            mount -t $DEVICE_FS_TYPE $DEVICE $mnt_pnt
> 710:            mount $DEVICE $mnt_pnt
> 728:        rm -rf $mnt_pnt
> 984:mkdir -p "${TMP}/mnt_pnt.XXXXXX"
> 
> Are those directories created before usage?

Yes, for each test that needs to work with files a directory is created
before the test is started and removed at test exit.

-- 
Cyril Hrubis
chrubis@suse.cz

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Re: [LTP] How to run only a specific test series like for example IPC?

[chrubis]

Hi!
> >> I wanted to only run the IPC tests as I have troubles with IPC(-MSG)
> >> in Linux-Next.
> >>
> >> This is what I did...
> >>
> >> root# cd /opt/ltp/
> >>
> >> root# ./runltp ./runtest/ipc
> >>
> >> ...is that the correct way? Wrong?
> >
> > I belive that the syntax is ./runltp -f ipc
> >
> > Also there are additional tests for POSIX IPC in open_posix_testsuite
> > that are not executed by the runltp script.
> >
> 
> How do I run the "POSIX IPC"?

Look into testcases/open_posix_testsuite/ directory, the openposix
testcases are currently not executed from the runltp script and needs to
be compiled and executed separetely. Do 'make' and 'make test' to
compile and run the testsuite (it contains testcases for POSIX
semaphores, message queues and shared memory).

-- 
Cyril Hrubis
chrubis@suse.cz

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