linux-stable.git/tools/testing/selftests/vm/Makefile, branch linux-4.3.y

userfaultfd: selftest: headers fixup

2015-09-22T22:09:53+00:00

Depend on "make headers_install" to create proper headers to include and
provide syscall numbers.

Signed-off-by: Andrea Arcangeli 
Cc: Dr. David Alan Gilbert 
Cc: Michael Ellerman 
Cc: Shuah Khan 
Cc: Thierry Reding 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

userfaultfd: selftests: vm: pick up sanitized kernel headers

2015-09-22T22:09:53+00:00

Add the usr/include subdirectory of the top-level tree to the include
path, and make sure to include headers without relative paths to make
sure the sanitized headers get picked up.  Otherwise the compiler will
not be able to find the linux/compiler.h header included by the non-
sanitized include/uapi/linux/userfaultfd.h.

While at it, make sure to only hardcode the syscall numbers on x86 and
PowerPC if they haven't been properly picked up from the headers.

Signed-off-by: Thierry Reding 
Acked-by: Michael Ellerman 
Cc: Shuah Khan 
Signed-off-by: Andrea Arcangeli 
Cc: Dr. David Alan Gilbert 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Revert "selftests: add hugetlbfstest"

2015-09-08T22:35:28+00:00

This manually reverts 7e50533d4b842 ("selftests: add hugetlbfstest").

The hugetlbfstest test depends on hugetlb pages being counted in a
task's rss.  This functionality is not in the kernel, so the test will
always fail.  Remove test to avoid confusion.

Signed-off-by: Mike Kravetz 
Acked-by: Naoya Horiguchi 
Cc: Joern Engel 
Cc: Davidlohr Bueso 
Cc: David Rientjes 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

userfaultfd: selftest

2015-09-04T23:54:41+00:00

This test allocates two virtual areas and bounces the physical memory
across the two virtual areas using only userfaultfd.

Signed-off-by: Andrea Arcangeli 
Cc: Pavel Emelyanov 
Cc: Dave Hansen 
Cc: Linus Torvalds 
Cc: Shuah Khan 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Test compaction of mlocked memory

2015-05-26T21:58:06+00:00

Commit commit 5bbe3547aa3b ("mm: allow compaction of unevictable pages")
introduced a sysctl that allows userspace to enable scanning of locked
pages for compaction.  This patch introduces a new test which fragments
main memory and attempts to allocate a number of huge pages to exercise
this compaction logic.

Tested on machines with up to 32 GB RAM. With the patch a much larger
number of huge pages can be allocated than on the kernel without the
patch.

Example output:
On a machine with 16 GB RAM:
sudo make run_tests vm
...
-----------------------
running compaction_test
-----------------------
No of huge pages allocated = 3834
[PASS]
...

Signed-off-by: Sri Jayaramappa 
Cc: linux-kernel@vger.kernel.org
Cc: linux-api@vger.kernel.org
Cc: Andrew Morton 
Cc: Eric B Munson 
Reviewed-by: Eric B Munson 
Acked-by: Andrew Morton 
Signed-off-by: Shuah Khan

selftests: Set CC using CROSS_COMPILE once in lib.mk

2015-03-19T21:16:51+00:00

This avoids repeating the logic in every Makefile. We mimic the
top-level Makefile and use $(CROSS_COMPILE)gcc.

Signed-off-by: Michael Ellerman 
Signed-off-by: Shuah Khan

selftests: Add install target

2015-03-13T21:21:56+00:00

This adds make install support to selftests. The basic usage is:

$ cd tools/testing/selftests
$ make install

That installs into tools/testing/selftests/install, which can then be
copied where ever necessary.

The install destination is also configurable using eg:

$ INSTALL_PATH=/mnt/selftests make install

The implementation uses two targets in the child makefiles. The first
"install" is expected to install all files into $(INSTALL_PATH).

The second, "emit_tests", is expected to emit the test instructions (ie.
bash script) on stdout. Separating this from install means the child
makefiles need no knowledge of the location of the test script.

Signed-off-by: Michael Ellerman 
Signed-off-by: Shuah Khan

selftests: Introduce minimal shared logic for running tests

2015-03-13T21:13:40+00:00

This adds a Make include file which most selftests can then include to
get the run_tests logic.

On its own this has the advantage of some reduction in repetition, and
also means the pass/fail message is defined in fewer places.

However the key advantage is it will allow us to implement install very
simply in a subsequent patch.

The default implementation just executes each program in $(TEST_PROGS).

We use a variable to hold the default implementation of $(RUN_TESTS)
because that gives us a clean way to override it if necessary, ie. using
override. The mount, memory-hotplug and mqueue tests use that to provide
a different implementation.

Tests are not run via /bin/bash, so if they are scripts they must be
executable, we add a+x to several.

Signed-off-by: Michael Ellerman 
Signed-off-by: Shuah Khan

selftests/vm: fix link error for transhuge-stress test

2015-01-08T16:01:00+00:00

add -lrt to fix undefined reference to `clock_gettime'
error seen when the test is compiled using gcc 4.6.4.

Signed-off-by: Andrey Skvortsov 
Signed-off-by: Shuah Khan

selftests/vm/transhuge-stress: stress test for memory compaction

2014-10-10T02:26:01+00:00

This tool induces memory fragmentation via sequential allocation of
transparent huge pages and splitting off everything except their last
sub-pages.  It easily generates pressure to the memory compaction code.

$ perf stat -e 'compaction:*' -e 'migrate:*' ./transhuge-stress
transhuge-stress: allocate 7858 transhuge pages, using 15716 MiB virtual memory and 61 MiB of ram
transhuge-stress: 1.653 s/loop, 0.210 ms/page,   9504.828 MiB/s	7858 succeed,    0 failed, 2439 different pages
transhuge-stress: 1.537 s/loop, 0.196 ms/page,  10226.227 MiB/s	7858 succeed,    0 failed, 2364 different pages
transhuge-stress: 1.658 s/loop, 0.211 ms/page,   9479.215 MiB/s	7858 succeed,    0 failed, 2179 different pages
transhuge-stress: 1.617 s/loop, 0.206 ms/page,   9716.992 MiB/s	7858 succeed,    0 failed, 2421 different pages
^C./transhuge-stress: Interrupt

 Performance counter stats for './transhuge-stress':

         1.744.051      compaction:mm_compaction_isolate_migratepages
             1.014      compaction:mm_compaction_isolate_freepages
         1.744.051      compaction:mm_compaction_migratepages
             1.647      compaction:mm_compaction_begin
             1.647      compaction:mm_compaction_end
         1.744.051      migrate:mm_migrate_pages
                 0      migrate:mm_numa_migrate_ratelimit

       7,964696835 seconds time elapsed

Signed-off-by: Konstantin Khlebnikov 
Cc: Rafael Aquini 
Cc: Andrey Ryabinin 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds