litmus-rt-ext-res.git/tools/testing/selftests/rcutorture, branch EXT-RES

torture: Inflict default jitter

2016-06-14T23:03:32+00:00

This commit enables jitter by default.  It may be manually disabled
by passing "--jitter 0" to kvm.sh.

Signed-off-by: Paul E. McKenney

rcutorture: Drop "-soundhw pcspkr" from x86 boot arguments

2016-06-14T23:03:30+00:00

Because recent testing shows that "-soundhw pcspkr" is no longer required
in the kernel boot arguments, this commit drops this qemu argument.

Reported-by: Josh Triplett 
Signed-off-by: Paul E. McKenney

rcutorture: Don't specify the cpu type of QEMU on PPC

2016-06-14T23:03:30+00:00

Do not restrict the cpu type to POWER7 for QEMU as we have POWER8 now.

Signed-off-by: Boqun Feng 
Reviewed-by: Josh Triplett 
Signed-off-by: Paul E. McKenney

rcutorture: Make -soundhw a x86 specific option

2016-06-14T23:03:29+00:00

The option "-soundhw pcspk" gives me a error on PPC as follow:

qemu-system-ppc64: ISA bus not available for pcspk

This means this option doesn't work on ppc by default. So simply make
this an x86-specific option via identify_qemu_args().

Signed-off-by: Boqun Feng 
Reviewed-by: Josh Triplett 
Signed-off-by: Paul E. McKenney

rcutorture: Use vmlinux as the fallback kernel image

2016-06-14T23:03:29+00:00

The vmlinux image is available for all the architectures, and suitable
for running a KVM guest by QEMU, besides, we used to copy the vmlinux
to $resdir anyway. Therefore it makes sense to use it as the fallback
kernel image for rcutorture KVM tests.

This patch makes identify_boot_image() return vmlinux if
${TORTURE_BOOT_IMAGE} is not set on non-x86 architectures, also fixes
several places that hard-code "bzImage" as $KERNEL.

This also fixes a problem that PPC doesn't have a bzImage file as build
results.

Signed-off-by: Boqun Feng 
Reviewed-by: Josh Triplett 
Signed-off-by: Paul E. McKenney

rcutorture/doc: Create initrd using dracut

2016-06-14T23:03:28+00:00

Using dracut is another way to get an initramfs for KVM-based RCU
torture tests, which is more flexible than using the host's initramfs
image, because modules and binaries may be added or removed via dracut
command options. So add an example in the document, in case that there
are some situations where host's initramfs couldn't be used.

Signed-off-by: Boqun Feng 
Reviewed-by: Josh Triplett 
Signed-off-by: Paul E. McKenney

torture: Add starvation events to error summary

2016-06-14T23:02:17+00:00

This commit adds a string of the form "Starves: 10" to the summary
line for error conditions found in the console output.

Signed-off-by: Paul E. McKenney

torture: Forgive lengthy trace dumps and preemption

2016-06-14T23:02:16+00:00

This commit avoids killing qemu if a trace dump is making progress
or if console log output is continuing and the console log timestamp
does not exceed the total plus grace period.

Signed-off-by: Paul E. McKenney

rcutorture: Add boot-time adjustment of leaf fanout

2016-04-21T20:47:04+00:00

Currently, the rcutorture scripts do not test boot-time adjustment of
leaf fanout (via the rcutree.rcu_fanout_leaf boot parameter), as was noted
during testing carried out by Iftekhar Ahmed of Oregon State University.
This commit therefore adjusts TREE04's CONFIG_RCU_FANOUT_LEAF from 4 to 3,
and also adds rcutree.rcu_fanout_leaf=4 to its boot parameters.  This
change forces RCU's boot-time geometry-change code to be exercised.

Signed-off-by: Paul E. McKenney

rcutorture: Don't rebuild identical kernel

2016-04-21T20:47:04+00:00

Currently, if the user specifies multiple runs of a given test
configuration, the scripting does multiple kernel builds.  This wastes
both time and disk space, so this commit makes the scripting use the
first build for all runs of a given test configuration.

Signed-off-by: Paul E. McKenney