tools/mm/thp_swap_allocator_test.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
10  * can be enabled by "-s".
15  *  echo never > /sys/kernel/mm/transparent_hugepage/hugepages-2048kB/enabled
16  *  echo always > /sys/kernel/mm/transparent_hugepage/hugepages-64kB/enabled
20  * w/o "-s".
22  * Author(s): Barry Song <v-songbaohua@oppo.com>
44 	"/sys/kernel/mm/transparent_hugepage/hugepages-64kB/stats/swpout"
46 	"/sys/kernel/mm/transparent_hugepage/hugepages-64kB/stats/swpout_fallback"
63  * currently don't support large folios swap-in.
126 		if (strcmp(argv[i], "-s") == 0)  in main()
128 		else if (strcmp(argv[i], "-a") == 0)  in main()
160 	/* warm-up phase to occupy the swapfile */  in main()
168 	/* iterations with newly created mTHP, swap-in, and swap-out */  in main()
176 		double fallback_percentage;  in main()
183 		 * since large folio swap-in isn't supported yet. Once we support  in main()
184 		 * mTHP swap-in, we'll likely need to reduce MEMSIZE_MTHP and  in main()
219 		swpout_inc = final_swpout - initial_swpout;  in main()
220 		swpout_fallback_inc = final_swpout_fallback - initial_swpout_fallback;  in main()
222 		fallback_percentage = (double)swpout_fallback_inc /  in main()