linux-kernel - [PATCH v3 7/9] selftests/vm: run_vmtests.sh: update and clean up gup

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Message-ID: <20201026064021.3545418-8-jhubbard@nvidia.com>
Date:   Sun, 25 Oct 2020 23:40:19 -0700
From:   John Hubbard <jhubbard@...dia.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
CC:     Shuah Khan <shuah@...nel.org>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Ralph Campbell <rcampbell@...dia.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        LKML <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
        <linux-kselftest@...r.kernel.org>,
        John Hubbard <jhubbard@...dia.com>
Subject: [PATCH v3 7/9] selftests/vm: run_vmtests.sh: update and clean up gup_test invocation

Run benchmarks on the _fast variants of gup and pup, as originally
intended.

Run the new gup_test sub-test: dump pages.  In addition to exercising the
dump_page() call, it also demonstrates the various options you can use to
specify which pages to dump, and how.

Signed-off-by: John Hubbard <jhubbard@...dia.com>
Cc: Jérôme Glisse <jglisse@...hat.com>
Cc: Jonathan Corbet <corbet@....net>
Cc: Ralph Campbell <rcampbell@...dia.com>
Cc: Shuah Khan <shuah@...nel.org>
---
 tools/testing/selftests/vm/run_vmtests.sh | 28 ++++++++++++++++-------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/tools/testing/selftests/vm/run_vmtests.sh b/tools/testing/selftests/vm/run_vmtests.sh
index d1843d5f3c30..4ac84b350d9f 100755
--- a/tools/testing/selftests/vm/run_vmtests.sh
+++ b/tools/testing/selftests/vm/run_vmtests.sh
@@ -123,10 +123,10 @@ else
 	echo "[PASS]"
 fi
 
-echo "--------------------------------------------"
-echo "running 'gup_test -U' (normal/slow gup)"
-echo "--------------------------------------------"
-./gup_test -U
+echo "------------------------------------------------------"
+echo "running: gup_test -u # get_user_pages_fast() benchmark"
+echo "------------------------------------------------------"
+./gup_test -u
 if [ $? -ne 0 ]; then
 	echo "[FAIL]"
 	exitcode=1
@@ -134,10 +134,22 @@ else
 	echo "[PASS]"
 fi
 
-echo "------------------------------------------"
-echo "running gup_test -b (pin_user_pages)"
-echo "------------------------------------------"
-./gup_test -b
+echo "------------------------------------------------------"
+echo "running: gup_test -a # pin_user_pages_fast() benchmark"
+echo "------------------------------------------------------"
+./gup_test -a
+if [ $? -ne 0 ]; then
+	echo "[FAIL]"
+	exitcode=1
+else
+	echo "[PASS]"
+fi
+
+echo "------------------------------------------------------------"
+echo "# Dump pages 0, 19, and 4096, using pin_user_pages:"
+echo "running: gup_test -ct -F 0x1 0 19 0x1000 # dump_page() test"
+echo "------------------------------------------------------------"
+./gup_test -ct -F 0x1 0 19 0x1000
 if [ $? -ne 0 ]; then
 	echo "[FAIL]"
 	exitcode=1
-- 
2.29.0