On 26/02/2024 10.38, Nicholas Piggin wrote:
This test stores to a bunch of pages and verifies previous stores,
while being continually migrated. This can fail due to a QEMU TCG
physical memory dirty bitmap bug.
Good idea, but could we then please drop "continuous" test from
selftest-migration.c again? ... having two common tests to exercise the
continuous migration that take quite a bunch of seconds to finish sounds
like a waste of time in the long run to me.
Signed-off-by: Nicholas Piggin <npiggin@xxxxxxxxx>
---
common/memory-verify.c | 48 +++++++++++++++++++++++++++++++++++++++++
powerpc/Makefile.common | 1 +
powerpc/memory-verify.c | 1 +
powerpc/unittests.cfg | 7 ++++++
s390x/Makefile | 1 +
s390x/memory-verify.c | 1 +
s390x/unittests.cfg | 6 ++++++
7 files changed, 65 insertions(+)
create mode 100644 common/memory-verify.c
create mode 120000 powerpc/memory-verify.c
create mode 120000 s390x/memory-verify.c
diff --git a/common/memory-verify.c b/common/memory-verify.c
new file mode 100644
index 000000000..7c4ec087b
--- /dev/null
+++ b/common/memory-verify.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Simple memory verification test, used to exercise dirty memory migration.
+ *
+ */
+#include <libcflat.h>
+#include <migrate.h>
+#include <alloc.h>
+#include <asm/page.h>
+#include <asm/time.h>
+
+#define NR_PAGES 32
+
+int main(int argc, char **argv)
+{
+ void *mem = malloc(NR_PAGES*PAGE_SIZE);
+ bool success = true;
+ uint64_t ms;
+ long i;
+
+ report_prefix_push("memory");
+
+ memset(mem, 0, NR_PAGES*PAGE_SIZE);
+
+ migrate_begin_continuous();
+ ms = get_clock_ms();
+ i = 0;
+ do {
+ int j;
+
+ for (j = 0; j < NR_PAGES*PAGE_SIZE; j += PAGE_SIZE) {
+ if (*(volatile long *)(mem + j) != i) {
+ success = false;
+ goto out;
+ }
+ *(volatile long *)(mem + j) = i + 1;
+ }
+ i++;
+ } while (get_clock_ms() - ms < 5000);
Maybe add a parameter so that the user can use different values for the
runtime than always doing 5 seconds?
Thomas
+out:
+ migrate_end_continuous();
+
+ report(success, "memory verification stress test");
+
+ report_prefix_pop();
+
+ return report_summary();
+}
