Proxmox-Port/linux-loongson
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson synced 2025-08-30 21:52:21 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

selftests/damon: implement a program for even-numbered memory regions access

Browse Source 
To test schemes_tried_regions feature, we need to have a program having
specific number of regions that having different access pattern.  Existing
artificial access pattern generator, 'access_memory', cannot be used for
the purpose, since it accesses only one region at a given time.  Extending
it could be an option, but since the purpose and the implementation are
pretty simple, implementing another one from the scratch is better.

Implement such another artificial memory access program that allocates
user-defined number/size regions and accesses even-numbered regions.

Link: https://lkml.kernel.org/r/20240625180538.73134-4-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2024-06-25 11:05:33 -07:00 committed by Andrew Morton
parent 209e6313fb
commit c94df805c7
2 changed files with 43 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/testing/selftests/damon/Makefile
View File

@ -4,7 +4,7 @@
TEST_GEN_FILES += huge_count_read_write
TEST_GEN_FILES += debugfs_target_ids_read_before_terminate_race
TEST_GEN_FILES += debugfs_target_ids_pid_leak
TEST_GEN_FILES += access_memory
TEST_GEN_FILES += access_memory access_memory_even
TEST_FILES = _chk_dependency.sh _debugfs_common.sh

42
tools/testing/selftests/damon/access_memory_even.c Normal file
View File

@ -0,0 +1,42 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Artificial memory access program for testing DAMON.
*
* Receives number of regions and size of each region from user. Allocate the
* regions and repeatedly access even numbered (starting from zero) regions.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
int main(int argc, char *argv[])
{
char **regions;
clock_t start_clock;
int nr_regions;
int sz_region;
int access_time_ms;
int i;
if (argc != 3) {
printf("Usage: %s <number> <size (bytes)>\n", argv[0]);
return -1;
}
nr_regions = atoi(argv[1]);
sz_region = atoi(argv[2]);
regions = malloc(sizeof(*regions) * nr_regions);
for (i = 0; i < nr_regions; i++)
regions[i] = malloc(sz_region);
while (1) {
for (i = 0; i < nr_regions; i++) {
if (i % 2 == 0)
memset(regions[i], i, sz_region);
}
}
return 0;
}