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authorHyman Huang(黄勇)2022-06-25 19:38:33 +0200
committerDr. David Alan Gilbert2022-07-20 13:15:08 +0200
commitcc2b33eab03710ae9dcb3ff68e8fcc634d1e9ad2 (patch)
tree0b4029a1cfe60ac541e2791032e7777daeae5fc7 /softmmu
parentmigration/dirtyrate: Refactor dirty page rate calculation (diff)
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softmmu/dirtylimit: Implement vCPU dirtyrate calculation periodically
Introduce the third method GLOBAL_DIRTY_LIMIT of dirty tracking for calculate dirtyrate periodly for dirty page rate limit. Add dirtylimit.c to implement dirtyrate calculation periodly, which will be used for dirty page rate limit. Add dirtylimit.h to export util functions for dirty page rate limit implementation. Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn> Reviewed-by: Peter Xu <peterx@redhat.com> Message-Id: <5d0d641bffcb9b1c4cc3e323b6dfecb36050d948.1656177590.git.huangy81@chinatelecom.cn> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Diffstat (limited to 'softmmu')
-rw-r--r--softmmu/dirtylimit.c116
-rw-r--r--softmmu/meson.build1
2 files changed, 117 insertions, 0 deletions
diff --git a/softmmu/dirtylimit.c b/softmmu/dirtylimit.c
new file mode 100644
index 0000000000..ebdc064c9d
--- /dev/null
+++ b/softmmu/dirtylimit.c
@@ -0,0 +1,116 @@
+/*
+ * Dirty page rate limit implementation code
+ *
+ * Copyright (c) 2022 CHINA TELECOM CO.,LTD.
+ *
+ * Authors:
+ * Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qemu/main-loop.h"
+#include "qapi/qapi-commands-migration.h"
+#include "sysemu/dirtyrate.h"
+#include "sysemu/dirtylimit.h"
+#include "exec/memory.h"
+#include "hw/boards.h"
+
+struct {
+ VcpuStat stat;
+ bool running;
+ QemuThread thread;
+} *vcpu_dirty_rate_stat;
+
+static void vcpu_dirty_rate_stat_collect(void)
+{
+ VcpuStat stat;
+ int i = 0;
+
+ /* calculate vcpu dirtyrate */
+ vcpu_calculate_dirtyrate(DIRTYLIMIT_CALC_TIME_MS,
+ &stat,
+ GLOBAL_DIRTY_LIMIT,
+ false);
+
+ for (i = 0; i < stat.nvcpu; i++) {
+ vcpu_dirty_rate_stat->stat.rates[i].id = i;
+ vcpu_dirty_rate_stat->stat.rates[i].dirty_rate =
+ stat.rates[i].dirty_rate;
+ }
+
+ free(stat.rates);
+}
+
+static void *vcpu_dirty_rate_stat_thread(void *opaque)
+{
+ rcu_register_thread();
+
+ /* start log sync */
+ global_dirty_log_change(GLOBAL_DIRTY_LIMIT, true);
+
+ while (qatomic_read(&vcpu_dirty_rate_stat->running)) {
+ vcpu_dirty_rate_stat_collect();
+ }
+
+ /* stop log sync */
+ global_dirty_log_change(GLOBAL_DIRTY_LIMIT, false);
+
+ rcu_unregister_thread();
+ return NULL;
+}
+
+int64_t vcpu_dirty_rate_get(int cpu_index)
+{
+ DirtyRateVcpu *rates = vcpu_dirty_rate_stat->stat.rates;
+ return qatomic_read_i64(&rates[cpu_index].dirty_rate);
+}
+
+void vcpu_dirty_rate_stat_start(void)
+{
+ if (qatomic_read(&vcpu_dirty_rate_stat->running)) {
+ return;
+ }
+
+ qatomic_set(&vcpu_dirty_rate_stat->running, 1);
+ qemu_thread_create(&vcpu_dirty_rate_stat->thread,
+ "dirtyrate-stat",
+ vcpu_dirty_rate_stat_thread,
+ NULL,
+ QEMU_THREAD_JOINABLE);
+}
+
+void vcpu_dirty_rate_stat_stop(void)
+{
+ qatomic_set(&vcpu_dirty_rate_stat->running, 0);
+ qemu_mutex_unlock_iothread();
+ qemu_thread_join(&vcpu_dirty_rate_stat->thread);
+ qemu_mutex_lock_iothread();
+}
+
+void vcpu_dirty_rate_stat_initialize(void)
+{
+ MachineState *ms = MACHINE(qdev_get_machine());
+ int max_cpus = ms->smp.max_cpus;
+
+ vcpu_dirty_rate_stat =
+ g_malloc0(sizeof(*vcpu_dirty_rate_stat));
+
+ vcpu_dirty_rate_stat->stat.nvcpu = max_cpus;
+ vcpu_dirty_rate_stat->stat.rates =
+ g_malloc0(sizeof(DirtyRateVcpu) * max_cpus);
+
+ vcpu_dirty_rate_stat->running = false;
+}
+
+void vcpu_dirty_rate_stat_finalize(void)
+{
+ free(vcpu_dirty_rate_stat->stat.rates);
+ vcpu_dirty_rate_stat->stat.rates = NULL;
+
+ free(vcpu_dirty_rate_stat);
+ vcpu_dirty_rate_stat = NULL;
+}
diff --git a/softmmu/meson.build b/softmmu/meson.build
index 8138248661..3272af1f31 100644
--- a/softmmu/meson.build
+++ b/softmmu/meson.build
@@ -4,6 +4,7 @@ specific_ss.add(when: 'CONFIG_SOFTMMU', if_true: [files(
'memory.c',
'physmem.c',
'qtest.c',
+ 'dirtylimit.c',
)])
specific_ss.add(when: ['CONFIG_SOFTMMU', 'CONFIG_TCG'], if_true: [files(