From: Sachin P Bappalige <sachinpb@linux.ibm.com>
To: ltp@lists.linux.it
Cc: sachinpb@linux.ibm.com
Subject: [LTP] [PATCH] Migrating the libhugetlbfs/testcases/shm-gettest.c test
Date: Wed, 15 May 2024 04:21:20 -0500 [thread overview]
Message-ID: <20240515092120.3167-1-sachinpb@linux.ibm.com> (raw)
Test Description: This testcase creates shared memory segments
backed by hugepages, writes specific patterns to each segment,
verifies pattern and detaches a shared memory segments in a loop.
This looping test was added to verify the functionality of
large page backed shared memory segments. A segment is created,
written, verified, and detached for specified number of times.
-Updated 'kernel/mem/.gitignore'
-Updated 'runtest/hugetlb' for number of iterations with -i 10
Signed-off-by: Sachin P Bappalige <sachinpb@linux.ibm.com>
---
runtest/hugetlb | 1 +
testcases/kernel/mem/.gitignore | 1 +
.../mem/hugetlb/hugeshmget/hugeshmget06.c | 78 +++++++++++++++++++
3 files changed, 80 insertions(+)
create mode 100644 testcases/kernel/mem/hugetlb/hugeshmget/hugeshmget06.c
diff --git a/runtest/hugetlb b/runtest/hugetlb
index 299c07ac9..f294e9aaa 100644
--- a/runtest/hugetlb
+++ b/runtest/hugetlb
@@ -55,3 +55,4 @@ hugeshmget01 hugeshmget01 -i 10
hugeshmget02 hugeshmget02 -i 10
hugeshmget03 hugeshmget03 -i 10
hugeshmget05 hugeshmget05 -i 10
+hugeshmget06 hugeshmget06 -i 10
diff --git a/testcases/kernel/mem/.gitignore b/testcases/kernel/mem/.gitignore
index c96fe8bfc..d88484fa1 100644
--- a/testcases/kernel/mem/.gitignore
+++ b/testcases/kernel/mem/.gitignore
@@ -47,6 +47,7 @@
/hugetlb/hugeshmget/hugeshmget02
/hugetlb/hugeshmget/hugeshmget03
/hugetlb/hugeshmget/hugeshmget05
+/hugetlb/hugeshmget/hugeshmget06
/ksm/ksm01
/ksm/ksm02
/ksm/ksm03
diff --git a/testcases/kernel/mem/hugetlb/hugeshmget/hugeshmget06.c b/testcases/kernel/mem/hugetlb/hugeshmget/hugeshmget06.c
new file mode 100644
index 000000000..85a731113
--- /dev/null
+++ b/testcases/kernel/mem/hugetlb/hugeshmget/hugeshmget06.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2005-2006, IBM Corporation.
+ * Author: David Gibson & Adam Litke
+ */
+
+/*\
+ * [Description]
+ * This testcase creates shared memory segments backed by hugepages,
+ * writes specific patterns to each segment, verifies pattern,
+ * and detaches a shared memory segments in a loop.
+ * It ensures that the hugepage backed shared memory functionalities
+ * works correctly by validating the data written to segment.
+ */
+
+#include "hugetlb.h"
+#include "tst_safe_sysv_ipc.h"
+
+#define MNTPOINT "hugetlbfs/"
+#define NR_HUGEPAGES 4
+
+static long hpage_size;
+static int shmid = -1, key = -1;
+
+static void run_test(void)
+{
+ size_t i, j;
+ char pattern;
+ char *shmaddr;
+
+ shmaddr = SAFE_SHMAT(shmid, 0, SHM_RND);
+ tst_res(TINFO, "shmaddr: %p", shmaddr);
+
+ for (i = 0; i < NR_HUGEPAGES; i++) {
+ pattern = 65 + (i % 26);
+ tst_res(TINFO, "Touching %p with %c",
+ shmaddr + (i * hpage_size), pattern);
+ memset(shmaddr + (i * hpage_size), pattern, hpage_size);
+ }
+
+ for (i = 0; i < NR_HUGEPAGES; i++) {
+ pattern = 65 + (i % 26);
+ tst_res(TINFO, "Verifying %p", (shmaddr + (i * hpage_size)));
+ for (j = 0; j < (size_t)hpage_size; j++)
+ if (*(shmaddr + (i * hpage_size) + j) != pattern) {
+ tst_res(TFAIL, "Got wrong byte 0x%02x expected 0x%02x",
+ *(shmaddr + (i * hpage_size) + j),
+ pattern);
+ return;
+ }
+ }
+ SAFE_SHMDT((const void *)shmaddr);
+ tst_res(TPASS, "shm hugepages works correctly");
+}
+
+static void setup(void)
+{
+ hpage_size = tst_get_hugepage_size();
+ tst_res(TINFO, "hugepage size is %ld", hpage_size);
+ shmid = SAFE_SHMGET(key, NR_HUGEPAGES * hpage_size, SHM_HUGETLB|IPC_CREAT|SHM_R|SHM_W);
+ tst_res(TINFO, "shmid: 0x%x", shmid);
+}
+
+static void cleanup(void)
+{
+ if (shmid >= 0)
+ SAFE_SHMCTL(shmid, IPC_RMID, NULL);
+}
+
+static struct tst_test test = {
+ .needs_root = 1,
+ .mntpoint = MNTPOINT,
+ .needs_hugetlbfs = 0,
+ .setup = setup,
+ .cleanup = cleanup,
+ .test_all = run_test,
+ .hugepages = {NR_HUGEPAGES, TST_NEEDS},
+};
--
2.43.0
--
Mailing list info: https://lists.linux.it/listinfo/ltp
next reply other threads:[~2024-05-15 10:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-15 9:21 Sachin P Bappalige [this message]
-- strict thread matches above, loose matches on Subject: below --
2023-09-08 12:11 [LTP] [PATCH] Migrating the libhugetlbfs/testcases/shm-gettest.c test Sachin P Bappalige
2023-09-08 12:35 ` Cyril Hrubis
2023-09-09 3:29 ` Geetika M
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