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mm/damon: add kunit tests
This commit adds kunit based unit tests for the core and the virtual address spaces monitoring primitives of DAMON. Link: https://lkml.kernel.org/r/20210716081449.22187-12-sj38.park@gmail.com Signed-off-by: SeongJae Park <sjpark@amazon.de> Reviewed-by: Brendan Higgins <brendanhiggins@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Amit Shah <amit@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Hildenbrand <david@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: David Woodhouse <dwmw@amazon.com> Cc: Fan Du <fan.du@intel.com> Cc: Fernand Sieber <sieberf@amazon.com> Cc: Greg Kroah-Hartman <greg@kroah.com> Cc: Greg Thelen <gthelen@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Joe Perches <joe@perches.com> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Leonard Foerster <foersleo@amazon.de> Cc: Marco Elver <elver@google.com> Cc: Markus Boehme <markubo@amazon.de> Cc: Maximilian Heyne <mheyne@amazon.de> Cc: Mel Gorman <mgorman@suse.de> Cc: Minchan Kim <minchan@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@surriel.com> Cc: Shakeel Butt <shakeelb@google.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
SeongJae Park
Linus Torvalds
parent
c4ba6014ae
commit
17ccae8bb5
7 changed files with 760 additions and 0 deletions
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@ -12,6 +12,18 @@ config DAMON
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See https://damonitor.github.io/doc/html/latest-damon/index.html for
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more information.
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config DAMON_KUNIT_TEST
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bool "Test for damon" if !KUNIT_ALL_TESTS
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depends on DAMON && KUNIT=y
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default KUNIT_ALL_TESTS
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help
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This builds the DAMON Kunit test suite.
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For more information on KUnit and unit tests in general, please refer
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to the KUnit documentation.
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If unsure, say N.
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config DAMON_VADDR
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bool "Data access monitoring primitives for virtual address spaces"
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depends on DAMON && MMU
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@ -20,6 +32,18 @@ config DAMON_VADDR
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This builds the default data access monitoring primitives for DAMON
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that works for virtual address spaces.
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config DAMON_VADDR_KUNIT_TEST
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bool "Test for DAMON primitives" if !KUNIT_ALL_TESTS
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depends on DAMON_VADDR && KUNIT=y
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default KUNIT_ALL_TESTS
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help
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This builds the DAMON virtual addresses primitives Kunit test suite.
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For more information on KUnit and unit tests in general, please refer
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to the KUnit documentation.
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If unsure, say N.
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config DAMON_DBGFS
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bool "DAMON debugfs interface"
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depends on DAMON_VADDR && DEBUG_FS
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@ -29,4 +53,16 @@ config DAMON_DBGFS
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If unsure, say N.
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config DAMON_DBGFS_KUNIT_TEST
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bool "Test for damon debugfs interface" if !KUNIT_ALL_TESTS
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depends on DAMON_DBGFS && KUNIT=y
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default KUNIT_ALL_TESTS
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help
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This builds the DAMON debugfs interface Kunit test suite.
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For more information on KUnit and unit tests in general, please refer
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to the KUnit documentation.
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If unsure, say N.
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endmenu
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253
mm/damon/core-test.h
Normal file
253
mm/damon/core-test.h
Normal file
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@ -0,0 +1,253 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Data Access Monitor Unit Tests
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*
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* Copyright 2019 Amazon.com, Inc. or its affiliates. All rights reserved.
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*
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* Author: SeongJae Park <sjpark@amazon.de>
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*/
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#ifdef CONFIG_DAMON_KUNIT_TEST
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#ifndef _DAMON_CORE_TEST_H
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#define _DAMON_CORE_TEST_H
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#include <kunit/test.h>
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static void damon_test_regions(struct kunit *test)
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{
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struct damon_region *r;
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struct damon_target *t;
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r = damon_new_region(1, 2);
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KUNIT_EXPECT_EQ(test, 1ul, r->ar.start);
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KUNIT_EXPECT_EQ(test, 2ul, r->ar.end);
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KUNIT_EXPECT_EQ(test, 0u, r->nr_accesses);
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t = damon_new_target(42);
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KUNIT_EXPECT_EQ(test, 0u, damon_nr_regions(t));
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damon_add_region(r, t);
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KUNIT_EXPECT_EQ(test, 1u, damon_nr_regions(t));
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damon_del_region(r, t);
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KUNIT_EXPECT_EQ(test, 0u, damon_nr_regions(t));
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damon_free_target(t);
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}
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static unsigned int nr_damon_targets(struct damon_ctx *ctx)
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{
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struct damon_target *t;
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unsigned int nr_targets = 0;
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damon_for_each_target(t, ctx)
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nr_targets++;
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return nr_targets;
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}
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static void damon_test_target(struct kunit *test)
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{
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struct damon_ctx *c = damon_new_ctx();
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struct damon_target *t;
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t = damon_new_target(42);
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KUNIT_EXPECT_EQ(test, 42ul, t->id);
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KUNIT_EXPECT_EQ(test, 0u, nr_damon_targets(c));
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damon_add_target(c, t);
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KUNIT_EXPECT_EQ(test, 1u, nr_damon_targets(c));
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damon_destroy_target(t);
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KUNIT_EXPECT_EQ(test, 0u, nr_damon_targets(c));
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damon_destroy_ctx(c);
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}
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/*
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* Test kdamond_reset_aggregated()
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*
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* DAMON checks access to each region and aggregates this information as the
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* access frequency of each region. In detail, it increases '->nr_accesses' of
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* regions that an access has confirmed. 'kdamond_reset_aggregated()' flushes
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* the aggregated information ('->nr_accesses' of each regions) to the result
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* buffer. As a result of the flushing, the '->nr_accesses' of regions are
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* initialized to zero.
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*/
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static void damon_test_aggregate(struct kunit *test)
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{
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struct damon_ctx *ctx = damon_new_ctx();
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unsigned long target_ids[] = {1, 2, 3};
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unsigned long saddr[][3] = {{10, 20, 30}, {5, 42, 49}, {13, 33, 55} };
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unsigned long eaddr[][3] = {{15, 27, 40}, {31, 45, 55}, {23, 44, 66} };
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unsigned long accesses[][3] = {{42, 95, 84}, {10, 20, 30}, {0, 1, 2} };
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struct damon_target *t;
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struct damon_region *r;
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int it, ir;
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damon_set_targets(ctx, target_ids, 3);
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it = 0;
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damon_for_each_target(t, ctx) {
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for (ir = 0; ir < 3; ir++) {
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r = damon_new_region(saddr[it][ir], eaddr[it][ir]);
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r->nr_accesses = accesses[it][ir];
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damon_add_region(r, t);
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}
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it++;
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}
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kdamond_reset_aggregated(ctx);
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it = 0;
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damon_for_each_target(t, ctx) {
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ir = 0;
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/* '->nr_accesses' should be zeroed */
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damon_for_each_region(r, t) {
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KUNIT_EXPECT_EQ(test, 0u, r->nr_accesses);
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ir++;
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}
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/* regions should be preserved */
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KUNIT_EXPECT_EQ(test, 3, ir);
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it++;
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}
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/* targets also should be preserved */
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KUNIT_EXPECT_EQ(test, 3, it);
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damon_destroy_ctx(ctx);
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}
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static void damon_test_split_at(struct kunit *test)
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{
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struct damon_ctx *c = damon_new_ctx();
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struct damon_target *t;
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struct damon_region *r;
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t = damon_new_target(42);
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r = damon_new_region(0, 100);
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damon_add_region(r, t);
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damon_split_region_at(c, t, r, 25);
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KUNIT_EXPECT_EQ(test, r->ar.start, 0ul);
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KUNIT_EXPECT_EQ(test, r->ar.end, 25ul);
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r = damon_next_region(r);
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KUNIT_EXPECT_EQ(test, r->ar.start, 25ul);
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KUNIT_EXPECT_EQ(test, r->ar.end, 100ul);
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damon_free_target(t);
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damon_destroy_ctx(c);
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}
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static void damon_test_merge_two(struct kunit *test)
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{
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struct damon_target *t;
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struct damon_region *r, *r2, *r3;
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int i;
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t = damon_new_target(42);
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r = damon_new_region(0, 100);
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r->nr_accesses = 10;
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damon_add_region(r, t);
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r2 = damon_new_region(100, 300);
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r2->nr_accesses = 20;
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damon_add_region(r2, t);
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damon_merge_two_regions(t, r, r2);
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KUNIT_EXPECT_EQ(test, r->ar.start, 0ul);
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KUNIT_EXPECT_EQ(test, r->ar.end, 300ul);
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KUNIT_EXPECT_EQ(test, r->nr_accesses, 16u);
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i = 0;
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damon_for_each_region(r3, t) {
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KUNIT_EXPECT_PTR_EQ(test, r, r3);
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i++;
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}
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KUNIT_EXPECT_EQ(test, i, 1);
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damon_free_target(t);
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}
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static struct damon_region *__nth_region_of(struct damon_target *t, int idx)
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{
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struct damon_region *r;
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unsigned int i = 0;
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damon_for_each_region(r, t) {
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if (i++ == idx)
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return r;
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}
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return NULL;
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}
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static void damon_test_merge_regions_of(struct kunit *test)
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{
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struct damon_target *t;
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struct damon_region *r;
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unsigned long sa[] = {0, 100, 114, 122, 130, 156, 170, 184};
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unsigned long ea[] = {100, 112, 122, 130, 156, 170, 184, 230};
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unsigned int nrs[] = {0, 0, 10, 10, 20, 30, 1, 2};
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unsigned long saddrs[] = {0, 114, 130, 156, 170};
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unsigned long eaddrs[] = {112, 130, 156, 170, 230};
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int i;
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t = damon_new_target(42);
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for (i = 0; i < ARRAY_SIZE(sa); i++) {
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r = damon_new_region(sa[i], ea[i]);
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r->nr_accesses = nrs[i];
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damon_add_region(r, t);
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}
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damon_merge_regions_of(t, 9, 9999);
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/* 0-112, 114-130, 130-156, 156-170 */
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KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 5u);
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for (i = 0; i < 5; i++) {
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r = __nth_region_of(t, i);
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KUNIT_EXPECT_EQ(test, r->ar.start, saddrs[i]);
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KUNIT_EXPECT_EQ(test, r->ar.end, eaddrs[i]);
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}
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damon_free_target(t);
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}
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static void damon_test_split_regions_of(struct kunit *test)
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{
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struct damon_ctx *c = damon_new_ctx();
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struct damon_target *t;
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struct damon_region *r;
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t = damon_new_target(42);
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r = damon_new_region(0, 22);
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damon_add_region(r, t);
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damon_split_regions_of(c, t, 2);
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KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 2u);
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damon_free_target(t);
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t = damon_new_target(42);
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r = damon_new_region(0, 220);
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damon_add_region(r, t);
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damon_split_regions_of(c, t, 4);
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KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 4u);
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damon_free_target(t);
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damon_destroy_ctx(c);
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}
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static struct kunit_case damon_test_cases[] = {
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KUNIT_CASE(damon_test_target),
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KUNIT_CASE(damon_test_regions),
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KUNIT_CASE(damon_test_aggregate),
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KUNIT_CASE(damon_test_split_at),
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KUNIT_CASE(damon_test_merge_two),
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KUNIT_CASE(damon_test_merge_regions_of),
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KUNIT_CASE(damon_test_split_regions_of),
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{},
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};
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static struct kunit_suite damon_test_suite = {
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.name = "damon",
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.test_cases = damon_test_cases,
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};
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kunit_test_suite(damon_test_suite);
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#endif /* _DAMON_CORE_TEST_H */
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#endif /* CONFIG_DAMON_KUNIT_TEST */
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@ -16,6 +16,11 @@
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#define CREATE_TRACE_POINTS
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#include <trace/events/damon.h>
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#ifdef CONFIG_DAMON_KUNIT_TEST
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#undef DAMON_MIN_REGION
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#define DAMON_MIN_REGION 1
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#endif
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/* Get a random number in [l, r) */
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#define damon_rand(l, r) (l + prandom_u32_max(r - l))
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@ -711,3 +716,5 @@ static int kdamond_fn(void *data)
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do_exit(0);
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}
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#include "core-test.h"
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126
mm/damon/dbgfs-test.h
Normal file
126
mm/damon/dbgfs-test.h
Normal file
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@ -0,0 +1,126 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* DAMON Debugfs Interface Unit Tests
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*
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* Author: SeongJae Park <sjpark@amazon.de>
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*/
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#ifdef CONFIG_DAMON_DBGFS_KUNIT_TEST
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#ifndef _DAMON_DBGFS_TEST_H
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#define _DAMON_DBGFS_TEST_H
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#include <kunit/test.h>
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static void damon_dbgfs_test_str_to_target_ids(struct kunit *test)
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{
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char *question;
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unsigned long *answers;
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unsigned long expected[] = {12, 35, 46};
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ssize_t nr_integers = 0, i;
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question = "123";
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answers = str_to_target_ids(question, strnlen(question, 128),
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&nr_integers);
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KUNIT_EXPECT_EQ(test, (ssize_t)1, nr_integers);
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KUNIT_EXPECT_EQ(test, 123ul, answers[0]);
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kfree(answers);
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question = "123abc";
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answers = str_to_target_ids(question, strnlen(question, 128),
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&nr_integers);
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KUNIT_EXPECT_EQ(test, (ssize_t)1, nr_integers);
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KUNIT_EXPECT_EQ(test, 123ul, answers[0]);
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kfree(answers);
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question = "a123";
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answers = str_to_target_ids(question, strnlen(question, 128),
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&nr_integers);
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KUNIT_EXPECT_EQ(test, (ssize_t)0, nr_integers);
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kfree(answers);
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question = "12 35";
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answers = str_to_target_ids(question, strnlen(question, 128),
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&nr_integers);
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KUNIT_EXPECT_EQ(test, (ssize_t)2, nr_integers);
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for (i = 0; i < nr_integers; i++)
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KUNIT_EXPECT_EQ(test, expected[i], answers[i]);
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kfree(answers);
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question = "12 35 46";
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answers = str_to_target_ids(question, strnlen(question, 128),
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&nr_integers);
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KUNIT_EXPECT_EQ(test, (ssize_t)3, nr_integers);
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for (i = 0; i < nr_integers; i++)
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KUNIT_EXPECT_EQ(test, expected[i], answers[i]);
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kfree(answers);
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question = "12 35 abc 46";
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answers = str_to_target_ids(question, strnlen(question, 128),
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&nr_integers);
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KUNIT_EXPECT_EQ(test, (ssize_t)2, nr_integers);
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for (i = 0; i < 2; i++)
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KUNIT_EXPECT_EQ(test, expected[i], answers[i]);
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kfree(answers);
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question = "";
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answers = str_to_target_ids(question, strnlen(question, 128),
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&nr_integers);
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KUNIT_EXPECT_EQ(test, (ssize_t)0, nr_integers);
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kfree(answers);
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question = "\n";
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answers = str_to_target_ids(question, strnlen(question, 128),
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&nr_integers);
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KUNIT_EXPECT_EQ(test, (ssize_t)0, nr_integers);
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kfree(answers);
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}
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static void damon_dbgfs_test_set_targets(struct kunit *test)
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{
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struct damon_ctx *ctx = dbgfs_new_ctx();
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unsigned long ids[] = {1, 2, 3};
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char buf[64];
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|
||||
/* Make DAMON consider target id as plain number */
|
||||
ctx->primitive.target_valid = NULL;
|
||||
ctx->primitive.cleanup = NULL;
|
||||
|
||||
damon_set_targets(ctx, ids, 3);
|
||||
sprint_target_ids(ctx, buf, 64);
|
||||
KUNIT_EXPECT_STREQ(test, (char *)buf, "1 2 3\n");
|
||||
|
||||
damon_set_targets(ctx, NULL, 0);
|
||||
sprint_target_ids(ctx, buf, 64);
|
||||
KUNIT_EXPECT_STREQ(test, (char *)buf, "\n");
|
||||
|
||||
damon_set_targets(ctx, (unsigned long []){1, 2}, 2);
|
||||
sprint_target_ids(ctx, buf, 64);
|
||||
KUNIT_EXPECT_STREQ(test, (char *)buf, "1 2\n");
|
||||
|
||||
damon_set_targets(ctx, (unsigned long []){2}, 1);
|
||||
sprint_target_ids(ctx, buf, 64);
|
||||
KUNIT_EXPECT_STREQ(test, (char *)buf, "2\n");
|
||||
|
||||
damon_set_targets(ctx, NULL, 0);
|
||||
sprint_target_ids(ctx, buf, 64);
|
||||
KUNIT_EXPECT_STREQ(test, (char *)buf, "\n");
|
||||
|
||||
dbgfs_destroy_ctx(ctx);
|
||||
}
|
||||
|
||||
static struct kunit_case damon_test_cases[] = {
|
||||
KUNIT_CASE(damon_dbgfs_test_str_to_target_ids),
|
||||
KUNIT_CASE(damon_dbgfs_test_set_targets),
|
||||
{},
|
||||
};
|
||||
|
||||
static struct kunit_suite damon_test_suite = {
|
||||
.name = "damon-dbgfs",
|
||||
.test_cases = damon_test_cases,
|
||||
};
|
||||
kunit_test_suite(damon_test_suite);
|
||||
|
||||
#endif /* _DAMON_TEST_H */
|
||||
|
||||
#endif /* CONFIG_DAMON_KUNIT_TEST */
|
||||
|
|
@ -619,3 +619,5 @@ static int __init damon_dbgfs_init(void)
|
|||
}
|
||||
|
||||
module_init(damon_dbgfs_init);
|
||||
|
||||
#include "dbgfs-test.h"
|
||||
|
|
|
|||
329
mm/damon/vaddr-test.h
Normal file
329
mm/damon/vaddr-test.h
Normal file
|
|
@ -0,0 +1,329 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
/*
|
||||
* Data Access Monitor Unit Tests
|
||||
*
|
||||
* Copyright 2019 Amazon.com, Inc. or its affiliates. All rights reserved.
|
||||
*
|
||||
* Author: SeongJae Park <sjpark@amazon.de>
|
||||
*/
|
||||
|
||||
#ifdef CONFIG_DAMON_VADDR_KUNIT_TEST
|
||||
|
||||
#ifndef _DAMON_VADDR_TEST_H
|
||||
#define _DAMON_VADDR_TEST_H
|
||||
|
||||
#include <kunit/test.h>
|
||||
|
||||
static void __link_vmas(struct vm_area_struct *vmas, ssize_t nr_vmas)
|
||||
{
|
||||
int i, j;
|
||||
unsigned long largest_gap, gap;
|
||||
|
||||
if (!nr_vmas)
|
||||
return;
|
||||
|
||||
for (i = 0; i < nr_vmas - 1; i++) {
|
||||
vmas[i].vm_next = &vmas[i + 1];
|
||||
|
||||
vmas[i].vm_rb.rb_left = NULL;
|
||||
vmas[i].vm_rb.rb_right = &vmas[i + 1].vm_rb;
|
||||
|
||||
largest_gap = 0;
|
||||
for (j = i; j < nr_vmas; j++) {
|
||||
if (j == 0)
|
||||
continue;
|
||||
gap = vmas[j].vm_start - vmas[j - 1].vm_end;
|
||||
if (gap > largest_gap)
|
||||
largest_gap = gap;
|
||||
}
|
||||
vmas[i].rb_subtree_gap = largest_gap;
|
||||
}
|
||||
vmas[i].vm_next = NULL;
|
||||
vmas[i].vm_rb.rb_right = NULL;
|
||||
vmas[i].rb_subtree_gap = 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Test __damon_va_three_regions() function
|
||||
*
|
||||
* In case of virtual memory address spaces monitoring, DAMON converts the
|
||||
* complex and dynamic memory mappings of each target task to three
|
||||
* discontiguous regions which cover every mapped areas. However, the three
|
||||
* regions should not include the two biggest unmapped areas in the original
|
||||
* mapping, because the two biggest areas are normally the areas between 1)
|
||||
* heap and the mmap()-ed regions, and 2) the mmap()-ed regions and stack.
|
||||
* Because these two unmapped areas are very huge but obviously never accessed,
|
||||
* covering the region is just a waste.
|
||||
*
|
||||
* '__damon_va_three_regions() receives an address space of a process. It
|
||||
* first identifies the start of mappings, end of mappings, and the two biggest
|
||||
* unmapped areas. After that, based on the information, it constructs the
|
||||
* three regions and returns. For more detail, refer to the comment of
|
||||
* 'damon_init_regions_of()' function definition in 'mm/damon.c' file.
|
||||
*
|
||||
* For example, suppose virtual address ranges of 10-20, 20-25, 200-210,
|
||||
* 210-220, 300-305, and 307-330 (Other comments represent this mappings in
|
||||
* more short form: 10-20-25, 200-210-220, 300-305, 307-330) of a process are
|
||||
* mapped. To cover every mappings, the three regions should start with 10,
|
||||
* and end with 305. The process also has three unmapped areas, 25-200,
|
||||
* 220-300, and 305-307. Among those, 25-200 and 220-300 are the biggest two
|
||||
* unmapped areas, and thus it should be converted to three regions of 10-25,
|
||||
* 200-220, and 300-330.
|
||||
*/
|
||||
static void damon_test_three_regions_in_vmas(struct kunit *test)
|
||||
{
|
||||
struct damon_addr_range regions[3] = {0,};
|
||||
/* 10-20-25, 200-210-220, 300-305, 307-330 */
|
||||
struct vm_area_struct vmas[] = {
|
||||
(struct vm_area_struct) {.vm_start = 10, .vm_end = 20},
|
||||
(struct vm_area_struct) {.vm_start = 20, .vm_end = 25},
|
||||
(struct vm_area_struct) {.vm_start = 200, .vm_end = 210},
|
||||
(struct vm_area_struct) {.vm_start = 210, .vm_end = 220},
|
||||
(struct vm_area_struct) {.vm_start = 300, .vm_end = 305},
|
||||
(struct vm_area_struct) {.vm_start = 307, .vm_end = 330},
|
||||
};
|
||||
|
||||
__link_vmas(vmas, 6);
|
||||
|
||||
__damon_va_three_regions(&vmas[0], regions);
|
||||
|
||||
KUNIT_EXPECT_EQ(test, 10ul, regions[0].start);
|
||||
KUNIT_EXPECT_EQ(test, 25ul, regions[0].end);
|
||||
KUNIT_EXPECT_EQ(test, 200ul, regions[1].start);
|
||||
KUNIT_EXPECT_EQ(test, 220ul, regions[1].end);
|
||||
KUNIT_EXPECT_EQ(test, 300ul, regions[2].start);
|
||||
KUNIT_EXPECT_EQ(test, 330ul, regions[2].end);
|
||||
}
|
||||
|
||||
static struct damon_region *__nth_region_of(struct damon_target *t, int idx)
|
||||
{
|
||||
struct damon_region *r;
|
||||
unsigned int i = 0;
|
||||
|
||||
damon_for_each_region(r, t) {
|
||||
if (i++ == idx)
|
||||
return r;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Test 'damon_va_apply_three_regions()'
|
||||
*
|
||||
* test kunit object
|
||||
* regions an array containing start/end addresses of current
|
||||
* monitoring target regions
|
||||
* nr_regions the number of the addresses in 'regions'
|
||||
* three_regions The three regions that need to be applied now
|
||||
* expected start/end addresses of monitoring target regions that
|
||||
* 'three_regions' are applied
|
||||
* nr_expected the number of addresses in 'expected'
|
||||
*
|
||||
* The memory mapping of the target processes changes dynamically. To follow
|
||||
* the change, DAMON periodically reads the mappings, simplifies it to the
|
||||
* three regions, and updates the monitoring target regions to fit in the three
|
||||
* regions. The update of current target regions is the role of
|
||||
* 'damon_va_apply_three_regions()'.
|
||||
*
|
||||
* This test passes the given target regions and the new three regions that
|
||||
* need to be applied to the function and check whether it updates the regions
|
||||
* as expected.
|
||||
*/
|
||||
static void damon_do_test_apply_three_regions(struct kunit *test,
|
||||
unsigned long *regions, int nr_regions,
|
||||
struct damon_addr_range *three_regions,
|
||||
unsigned long *expected, int nr_expected)
|
||||
{
|
||||
struct damon_ctx *ctx = damon_new_ctx();
|
||||
struct damon_target *t;
|
||||
struct damon_region *r;
|
||||
int i;
|
||||
|
||||
t = damon_new_target(42);
|
||||
for (i = 0; i < nr_regions / 2; i++) {
|
||||
r = damon_new_region(regions[i * 2], regions[i * 2 + 1]);
|
||||
damon_add_region(r, t);
|
||||
}
|
||||
damon_add_target(ctx, t);
|
||||
|
||||
damon_va_apply_three_regions(t, three_regions);
|
||||
|
||||
for (i = 0; i < nr_expected / 2; i++) {
|
||||
r = __nth_region_of(t, i);
|
||||
KUNIT_EXPECT_EQ(test, r->ar.start, expected[i * 2]);
|
||||
KUNIT_EXPECT_EQ(test, r->ar.end, expected[i * 2 + 1]);
|
||||
}
|
||||
|
||||
damon_destroy_ctx(ctx);
|
||||
}
|
||||
|
||||
/*
|
||||
* This function test most common case where the three big regions are only
|
||||
* slightly changed. Target regions should adjust their boundary (10-20-30,
|
||||
* 50-55, 70-80, 90-100) to fit with the new big regions or remove target
|
||||
* regions (57-79) that now out of the three regions.
|
||||
*/
|
||||
static void damon_test_apply_three_regions1(struct kunit *test)
|
||||
{
|
||||
/* 10-20-30, 50-55-57-59, 70-80-90-100 */
|
||||
unsigned long regions[] = {10, 20, 20, 30, 50, 55, 55, 57, 57, 59,
|
||||
70, 80, 80, 90, 90, 100};
|
||||
/* 5-27, 45-55, 73-104 */
|
||||
struct damon_addr_range new_three_regions[3] = {
|
||||
(struct damon_addr_range){.start = 5, .end = 27},
|
||||
(struct damon_addr_range){.start = 45, .end = 55},
|
||||
(struct damon_addr_range){.start = 73, .end = 104} };
|
||||
/* 5-20-27, 45-55, 73-80-90-104 */
|
||||
unsigned long expected[] = {5, 20, 20, 27, 45, 55,
|
||||
73, 80, 80, 90, 90, 104};
|
||||
|
||||
damon_do_test_apply_three_regions(test, regions, ARRAY_SIZE(regions),
|
||||
new_three_regions, expected, ARRAY_SIZE(expected));
|
||||
}
|
||||
|
||||
/*
|
||||
* Test slightly bigger change. Similar to above, but the second big region
|
||||
* now require two target regions (50-55, 57-59) to be removed.
|
||||
*/
|
||||
static void damon_test_apply_three_regions2(struct kunit *test)
|
||||
{
|
||||
/* 10-20-30, 50-55-57-59, 70-80-90-100 */
|
||||
unsigned long regions[] = {10, 20, 20, 30, 50, 55, 55, 57, 57, 59,
|
||||
70, 80, 80, 90, 90, 100};
|
||||
/* 5-27, 56-57, 65-104 */
|
||||
struct damon_addr_range new_three_regions[3] = {
|
||||
(struct damon_addr_range){.start = 5, .end = 27},
|
||||
(struct damon_addr_range){.start = 56, .end = 57},
|
||||
(struct damon_addr_range){.start = 65, .end = 104} };
|
||||
/* 5-20-27, 56-57, 65-80-90-104 */
|
||||
unsigned long expected[] = {5, 20, 20, 27, 56, 57,
|
||||
65, 80, 80, 90, 90, 104};
|
||||
|
||||
damon_do_test_apply_three_regions(test, regions, ARRAY_SIZE(regions),
|
||||
new_three_regions, expected, ARRAY_SIZE(expected));
|
||||
}
|
||||
|
||||
/*
|
||||
* Test a big change. The second big region has totally freed and mapped to
|
||||
* different area (50-59 -> 61-63). The target regions which were in the old
|
||||
* second big region (50-55-57-59) should be removed and new target region
|
||||
* covering the second big region (61-63) should be created.
|
||||
*/
|
||||
static void damon_test_apply_three_regions3(struct kunit *test)
|
||||
{
|
||||
/* 10-20-30, 50-55-57-59, 70-80-90-100 */
|
||||
unsigned long regions[] = {10, 20, 20, 30, 50, 55, 55, 57, 57, 59,
|
||||
70, 80, 80, 90, 90, 100};
|
||||
/* 5-27, 61-63, 65-104 */
|
||||
struct damon_addr_range new_three_regions[3] = {
|
||||
(struct damon_addr_range){.start = 5, .end = 27},
|
||||
(struct damon_addr_range){.start = 61, .end = 63},
|
||||
(struct damon_addr_range){.start = 65, .end = 104} };
|
||||
/* 5-20-27, 61-63, 65-80-90-104 */
|
||||
unsigned long expected[] = {5, 20, 20, 27, 61, 63,
|
||||
65, 80, 80, 90, 90, 104};
|
||||
|
||||
damon_do_test_apply_three_regions(test, regions, ARRAY_SIZE(regions),
|
||||
new_three_regions, expected, ARRAY_SIZE(expected));
|
||||
}
|
||||
|
||||
/*
|
||||
* Test another big change. Both of the second and third big regions (50-59
|
||||
* and 70-100) has totally freed and mapped to different area (30-32 and
|
||||
* 65-68). The target regions which were in the old second and third big
|
||||
* regions should now be removed and new target regions covering the new second
|
||||
* and third big regions should be crated.
|
||||
*/
|
||||
static void damon_test_apply_three_regions4(struct kunit *test)
|
||||
{
|
||||
/* 10-20-30, 50-55-57-59, 70-80-90-100 */
|
||||
unsigned long regions[] = {10, 20, 20, 30, 50, 55, 55, 57, 57, 59,
|
||||
70, 80, 80, 90, 90, 100};
|
||||
/* 5-7, 30-32, 65-68 */
|
||||
struct damon_addr_range new_three_regions[3] = {
|
||||
(struct damon_addr_range){.start = 5, .end = 7},
|
||||
(struct damon_addr_range){.start = 30, .end = 32},
|
||||
(struct damon_addr_range){.start = 65, .end = 68} };
|
||||
/* expect 5-7, 30-32, 65-68 */
|
||||
unsigned long expected[] = {5, 7, 30, 32, 65, 68};
|
||||
|
||||
damon_do_test_apply_three_regions(test, regions, ARRAY_SIZE(regions),
|
||||
new_three_regions, expected, ARRAY_SIZE(expected));
|
||||
}
|
||||
|
||||
static void damon_test_split_evenly(struct kunit *test)
|
||||
{
|
||||
struct damon_ctx *c = damon_new_ctx();
|
||||
struct damon_target *t;
|
||||
struct damon_region *r;
|
||||
unsigned long i;
|
||||
|
||||
KUNIT_EXPECT_EQ(test, damon_va_evenly_split_region(NULL, NULL, 5),
|
||||
-EINVAL);
|
||||
|
||||
t = damon_new_target(42);
|
||||
r = damon_new_region(0, 100);
|
||||
KUNIT_EXPECT_EQ(test, damon_va_evenly_split_region(t, r, 0), -EINVAL);
|
||||
|
||||
damon_add_region(r, t);
|
||||
KUNIT_EXPECT_EQ(test, damon_va_evenly_split_region(t, r, 10), 0);
|
||||
KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 10u);
|
||||
|
||||
i = 0;
|
||||
damon_for_each_region(r, t) {
|
||||
KUNIT_EXPECT_EQ(test, r->ar.start, i++ * 10);
|
||||
KUNIT_EXPECT_EQ(test, r->ar.end, i * 10);
|
||||
}
|
||||
damon_free_target(t);
|
||||
|
||||
t = damon_new_target(42);
|
||||
r = damon_new_region(5, 59);
|
||||
damon_add_region(r, t);
|
||||
KUNIT_EXPECT_EQ(test, damon_va_evenly_split_region(t, r, 5), 0);
|
||||
KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 5u);
|
||||
|
||||
i = 0;
|
||||
damon_for_each_region(r, t) {
|
||||
if (i == 4)
|
||||
break;
|
||||
KUNIT_EXPECT_EQ(test, r->ar.start, 5 + 10 * i++);
|
||||
KUNIT_EXPECT_EQ(test, r->ar.end, 5 + 10 * i);
|
||||
}
|
||||
KUNIT_EXPECT_EQ(test, r->ar.start, 5 + 10 * i);
|
||||
KUNIT_EXPECT_EQ(test, r->ar.end, 59ul);
|
||||
damon_free_target(t);
|
||||
|
||||
t = damon_new_target(42);
|
||||
r = damon_new_region(5, 6);
|
||||
damon_add_region(r, t);
|
||||
KUNIT_EXPECT_EQ(test, damon_va_evenly_split_region(t, r, 2), -EINVAL);
|
||||
KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 1u);
|
||||
|
||||
damon_for_each_region(r, t) {
|
||||
KUNIT_EXPECT_EQ(test, r->ar.start, 5ul);
|
||||
KUNIT_EXPECT_EQ(test, r->ar.end, 6ul);
|
||||
}
|
||||
damon_free_target(t);
|
||||
damon_destroy_ctx(c);
|
||||
}
|
||||
|
||||
static struct kunit_case damon_test_cases[] = {
|
||||
KUNIT_CASE(damon_test_three_regions_in_vmas),
|
||||
KUNIT_CASE(damon_test_apply_three_regions1),
|
||||
KUNIT_CASE(damon_test_apply_three_regions2),
|
||||
KUNIT_CASE(damon_test_apply_three_regions3),
|
||||
KUNIT_CASE(damon_test_apply_three_regions4),
|
||||
KUNIT_CASE(damon_test_split_evenly),
|
||||
{},
|
||||
};
|
||||
|
||||
static struct kunit_suite damon_test_suite = {
|
||||
.name = "damon-primitives",
|
||||
.test_cases = damon_test_cases,
|
||||
};
|
||||
kunit_test_suite(damon_test_suite);
|
||||
|
||||
#endif /* _DAMON_VADDR_TEST_H */
|
||||
|
||||
#endif /* CONFIG_DAMON_VADDR_KUNIT_TEST */
|
||||
|
|
@ -18,6 +18,11 @@
|
|||
#include <linux/sched/mm.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
#ifdef CONFIG_DAMON_VADDR_KUNIT_TEST
|
||||
#undef DAMON_MIN_REGION
|
||||
#define DAMON_MIN_REGION 1
|
||||
#endif
|
||||
|
||||
/* Get a random number in [l, r) */
|
||||
#define damon_rand(l, r) (l + prandom_u32_max(r - l))
|
||||
|
||||
|
|
@ -663,3 +668,5 @@ void damon_va_set_primitives(struct damon_ctx *ctx)
|
|||
ctx->primitive.target_valid = damon_va_target_valid;
|
||||
ctx->primitive.cleanup = NULL;
|
||||
}
|
||||
|
||||
#include "vaddr-test.h"
|
||||
|
|
|
|||
Loading…
Reference in a new issue