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Message-ID: <20230119200553.3922206-1-bgardon@google.com>
Date: Thu, 19 Jan 2023 20:05:52 +0000
From: Ben Gardon <bgardon@...gle.com>
To: linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc: Paolo Bonzini <pbonzini@...hat.com>, Peter Xu <peterx@...hat.com>,
Sean Christopherson <seanjc@...gle.com>,
David Matlack <dmatlack@...gle.com>,
Vipin Sharma <vipinsh@...gle.com>,
Ben Gardon <bgardon@...gle.com>
Subject: [RFC 1/2] selftests: KVM: Move dirty logging functions to memstress.(c|h)
Move some helper functions from dirty_log_perf_test.c to the memstress
library so that they can be used in a future commit which tests page
splitting during dirty logging.
Signed-off-by: Ben Gardon <bgardon@...gle.com>
---
.../selftests/kvm/dirty_log_perf_test.c | 84 ++-----------------
.../testing/selftests/kvm/include/memstress.h | 8 ++
tools/testing/selftests/kvm/lib/memstress.c | 72 ++++++++++++++++
3 files changed, 87 insertions(+), 77 deletions(-)
diff --git a/tools/testing/selftests/kvm/dirty_log_perf_test.c b/tools/testing/selftests/kvm/dirty_log_perf_test.c
index e9d6d1aecf89c..416719e205183 100644
--- a/tools/testing/selftests/kvm/dirty_log_perf_test.c
+++ b/tools/testing/selftests/kvm/dirty_log_perf_test.c
@@ -136,77 +136,6 @@ struct test_params {
bool random_access;
};
-static void toggle_dirty_logging(struct kvm_vm *vm, int slots, bool enable)
-{
- int i;
-
- for (i = 0; i < slots; i++) {
- int slot = MEMSTRESS_MEM_SLOT_INDEX + i;
- int flags = enable ? KVM_MEM_LOG_DIRTY_PAGES : 0;
-
- vm_mem_region_set_flags(vm, slot, flags);
- }
-}
-
-static inline void enable_dirty_logging(struct kvm_vm *vm, int slots)
-{
- toggle_dirty_logging(vm, slots, true);
-}
-
-static inline void disable_dirty_logging(struct kvm_vm *vm, int slots)
-{
- toggle_dirty_logging(vm, slots, false);
-}
-
-static void get_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[], int slots)
-{
- int i;
-
- for (i = 0; i < slots; i++) {
- int slot = MEMSTRESS_MEM_SLOT_INDEX + i;
-
- kvm_vm_get_dirty_log(vm, slot, bitmaps[i]);
- }
-}
-
-static void clear_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[],
- int slots, uint64_t pages_per_slot)
-{
- int i;
-
- for (i = 0; i < slots; i++) {
- int slot = MEMSTRESS_MEM_SLOT_INDEX + i;
-
- kvm_vm_clear_dirty_log(vm, slot, bitmaps[i], 0, pages_per_slot);
- }
-}
-
-static unsigned long **alloc_bitmaps(int slots, uint64_t pages_per_slot)
-{
- unsigned long **bitmaps;
- int i;
-
- bitmaps = malloc(slots * sizeof(bitmaps[0]));
- TEST_ASSERT(bitmaps, "Failed to allocate bitmaps array.");
-
- for (i = 0; i < slots; i++) {
- bitmaps[i] = bitmap_zalloc(pages_per_slot);
- TEST_ASSERT(bitmaps[i], "Failed to allocate slot bitmap.");
- }
-
- return bitmaps;
-}
-
-static void free_bitmaps(unsigned long *bitmaps[], int slots)
-{
- int i;
-
- for (i = 0; i < slots; i++)
- free(bitmaps[i]);
-
- free(bitmaps);
-}
-
static void run_test(enum vm_guest_mode mode, void *arg)
{
struct test_params *p = arg;
@@ -236,7 +165,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)
host_num_pages = vm_num_host_pages(mode, guest_num_pages);
pages_per_slot = host_num_pages / p->slots;
- bitmaps = alloc_bitmaps(p->slots, pages_per_slot);
+ bitmaps = memstress_alloc_bitmaps(p->slots, pages_per_slot);
if (dirty_log_manual_caps)
vm_enable_cap(vm, KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2,
@@ -277,7 +206,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)
/* Enable dirty logging */
clock_gettime(CLOCK_MONOTONIC, &start);
- enable_dirty_logging(vm, p->slots);
+ memstress_enable_dirty_logging(vm, p->slots);
ts_diff = timespec_elapsed(start);
pr_info("Enabling dirty logging time: %ld.%.9lds\n\n",
ts_diff.tv_sec, ts_diff.tv_nsec);
@@ -306,7 +235,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)
iteration, ts_diff.tv_sec, ts_diff.tv_nsec);
clock_gettime(CLOCK_MONOTONIC, &start);
- get_dirty_log(vm, bitmaps, p->slots);
+ memstress_get_dirty_log(vm, bitmaps, p->slots);
ts_diff = timespec_elapsed(start);
get_dirty_log_total = timespec_add(get_dirty_log_total,
ts_diff);
@@ -315,7 +244,8 @@ static void run_test(enum vm_guest_mode mode, void *arg)
if (dirty_log_manual_caps) {
clock_gettime(CLOCK_MONOTONIC, &start);
- clear_dirty_log(vm, bitmaps, p->slots, pages_per_slot);
+ memstress_clear_dirty_log(vm, bitmaps, p->slots,
+ pages_per_slot);
ts_diff = timespec_elapsed(start);
clear_dirty_log_total = timespec_add(clear_dirty_log_total,
ts_diff);
@@ -334,7 +264,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)
/* Disable dirty logging */
clock_gettime(CLOCK_MONOTONIC, &start);
- disable_dirty_logging(vm, p->slots);
+ memstress_disable_dirty_logging(vm, p->slots);
ts_diff = timespec_elapsed(start);
pr_info("Disabling dirty logging time: %ld.%.9lds\n",
ts_diff.tv_sec, ts_diff.tv_nsec);
@@ -359,7 +289,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)
clear_dirty_log_total.tv_nsec, avg.tv_sec, avg.tv_nsec);
}
- free_bitmaps(bitmaps, p->slots);
+ memstress_free_bitmaps(bitmaps, p->slots);
arch_cleanup_vm(vm);
memstress_destroy_vm(vm);
}
diff --git a/tools/testing/selftests/kvm/include/memstress.h b/tools/testing/selftests/kvm/include/memstress.h
index 72e3e358ef7bd..ce4e603050eaa 100644
--- a/tools/testing/selftests/kvm/include/memstress.h
+++ b/tools/testing/selftests/kvm/include/memstress.h
@@ -72,4 +72,12 @@ void memstress_guest_code(uint32_t vcpu_id);
uint64_t memstress_nested_pages(int nr_vcpus);
void memstress_setup_nested(struct kvm_vm *vm, int nr_vcpus, struct kvm_vcpu *vcpus[]);
+void memstress_enable_dirty_logging(struct kvm_vm *vm, int slots);
+void memstress_disable_dirty_logging(struct kvm_vm *vm, int slots);
+void memstress_get_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[], int slots);
+void memstress_clear_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[],
+ int slots, uint64_t pages_per_slot);
+unsigned long **memstress_alloc_bitmaps(int slots, uint64_t pages_per_slot);
+void memstress_free_bitmaps(unsigned long *bitmaps[], int slots);
+
#endif /* SELFTEST_KVM_MEMSTRESS_H */
diff --git a/tools/testing/selftests/kvm/lib/memstress.c b/tools/testing/selftests/kvm/lib/memstress.c
index 5f1d3173c238c..3632956c6bcf5 100644
--- a/tools/testing/selftests/kvm/lib/memstress.c
+++ b/tools/testing/selftests/kvm/lib/memstress.c
@@ -5,6 +5,7 @@
#define _GNU_SOURCE
#include <inttypes.h>
+#include <linux/bitmap.h>
#include "kvm_util.h"
#include "memstress.h"
@@ -320,3 +321,74 @@ void memstress_join_vcpu_threads(int nr_vcpus)
for (i = 0; i < nr_vcpus; i++)
pthread_join(vcpu_threads[i].thread, NULL);
}
+
+static void toggle_dirty_logging(struct kvm_vm *vm, int slots, bool enable)
+{
+ int i;
+
+ for (i = 0; i < slots; i++) {
+ int slot = MEMSTRESS_MEM_SLOT_INDEX + i;
+ int flags = enable ? KVM_MEM_LOG_DIRTY_PAGES : 0;
+
+ vm_mem_region_set_flags(vm, slot, flags);
+ }
+}
+
+void memstress_enable_dirty_logging(struct kvm_vm *vm, int slots)
+{
+ toggle_dirty_logging(vm, slots, true);
+}
+
+void memstress_disable_dirty_logging(struct kvm_vm *vm, int slots)
+{
+ toggle_dirty_logging(vm, slots, false);
+}
+
+void memstress_get_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[], int slots)
+{
+ int i;
+
+ for (i = 0; i < slots; i++) {
+ int slot = MEMSTRESS_MEM_SLOT_INDEX + i;
+
+ kvm_vm_get_dirty_log(vm, slot, bitmaps[i]);
+ }
+}
+
+void memstress_clear_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[],
+ int slots, uint64_t pages_per_slot)
+{
+ int i;
+
+ for (i = 0; i < slots; i++) {
+ int slot = MEMSTRESS_MEM_SLOT_INDEX + i;
+
+ kvm_vm_clear_dirty_log(vm, slot, bitmaps[i], 0, pages_per_slot);
+ }
+}
+
+unsigned long **memstress_alloc_bitmaps(int slots, uint64_t pages_per_slot)
+{
+ unsigned long **bitmaps;
+ int i;
+
+ bitmaps = malloc(slots * sizeof(bitmaps[0]));
+ TEST_ASSERT(bitmaps, "Failed to allocate bitmaps array.");
+
+ for (i = 0; i < slots; i++) {
+ bitmaps[i] = bitmap_zalloc(pages_per_slot);
+ TEST_ASSERT(bitmaps[i], "Failed to allocate slot bitmap.");
+ }
+
+ return bitmaps;
+}
+
+void memstress_free_bitmaps(unsigned long *bitmaps[], int slots)
+{
+ int i;
+
+ for (i = 0; i < slots; i++)
+ free(bitmaps[i]);
+
+ free(bitmaps);
+}
--
2.39.1.405.gd4c25cc71f-goog
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