--- /dev/null
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/thread.h"
+#include "hw/core/cpu.h"
+#include "qemu/main-loop.h"
+#include "sysemu/cpus.h"
+#include "sysemu/cpu-throttle.h"
+#include "trace.h"
+
+/* vcpu throttling controls */
+static QEMUTimer *throttle_timer;
+static unsigned int throttle_percentage;
+
+#define CPU_THROTTLE_PCT_MIN 1
+#define CPU_THROTTLE_PCT_MAX 99
+#define CPU_THROTTLE_TIMESLICE_NS 10000000
+
+static void cpu_throttle_thread(CPUState *cpu, run_on_cpu_data opaque)
+{
+ double pct;
+ double throttle_ratio;
+ int64_t sleeptime_ns, endtime_ns;
+
+ if (!cpu_throttle_get_percentage()) {
+ return;
+ }
+
+ pct = (double)cpu_throttle_get_percentage() / 100;
+ throttle_ratio = pct / (1 - pct);
+ /* Add 1ns to fix double's rounding error (like 0.9999999...) */
+ sleeptime_ns = (int64_t)(throttle_ratio * CPU_THROTTLE_TIMESLICE_NS + 1);
+ endtime_ns = qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + sleeptime_ns;
+ while (sleeptime_ns > 0 && !cpu->stop) {
+ if (sleeptime_ns > SCALE_MS) {
+ qemu_cond_timedwait_bql(cpu->halt_cond,
+ sleeptime_ns / SCALE_MS);
+ } else {
+ bql_unlock();
+ g_usleep(sleeptime_ns / SCALE_US);
+ bql_lock();
+ }
+ sleeptime_ns = endtime_ns - qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
+ }
+ qatomic_set(&cpu->throttle_thread_scheduled, 0);
+}
+
+static void cpu_throttle_timer_tick(void *opaque)
+{
+ CPUState *cpu;
+ double pct;
+
+ /* Stop the timer if needed */
+ if (!cpu_throttle_get_percentage()) {
+ return;
+ }
+ CPU_FOREACH(cpu) {
+ if (!qatomic_xchg(&cpu->throttle_thread_scheduled, 1)) {
+ async_run_on_cpu(cpu, cpu_throttle_thread,
+ RUN_ON_CPU_NULL);
+ }
+ }
+
+ pct = (double)cpu_throttle_get_percentage() / 100;
+ timer_mod(throttle_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL_RT) +
+ CPU_THROTTLE_TIMESLICE_NS / (1 - pct));
+}
+
+void cpu_throttle_set(int new_throttle_pct)
+{
+ /*
+ * boolean to store whether throttle is already active or not,
+ * before modifying throttle_percentage
+ */
+ bool throttle_active = cpu_throttle_active();
+
+ trace_cpu_throttle_set(new_throttle_pct);
+
+ /* Ensure throttle percentage is within valid range */
+ new_throttle_pct = MIN(new_throttle_pct, CPU_THROTTLE_PCT_MAX);
+ new_throttle_pct = MAX(new_throttle_pct, CPU_THROTTLE_PCT_MIN);
+
+ qatomic_set(&throttle_percentage, new_throttle_pct);
+
+ if (!throttle_active) {
+ cpu_throttle_timer_tick(NULL);
+ }
+}
+
+void cpu_throttle_stop(void)
+{
+ qatomic_set(&throttle_percentage, 0);
+}
+
+bool cpu_throttle_active(void)
+{
+ return (cpu_throttle_get_percentage() != 0);
+}
+
+int cpu_throttle_get_percentage(void)
+{
+ return qatomic_read(&throttle_percentage);
+}
+
+void cpu_throttle_init(void)
+{
+ throttle_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL_RT,
+ cpu_throttle_timer_tick, NULL);
+}
'block-dirty-bitmap.c',
'channel.c',
'channel-block.c',
+ 'cpu-throttle.c',
'dirtyrate.c',
'exec.c',
'fd.c',
ram_mig_init();
dirty_bitmap_mig_init();
+
+ /* Initialize cpu throttle timers */
+ cpu_throttle_init();
}
typedef struct {
# page_cache.c
migration_pagecache_init(int64_t max_num_items) "Setting cache buckets to %" PRId64
migration_pagecache_insert(void) "Error allocating page"
+
+# cpu-throttle.c
+cpu_throttle_set(int new_throttle_pct) "set guest CPU throttled by %d%%"
+++ /dev/null
-/*
- * QEMU System Emulator
- *
- * Copyright (c) 2003-2008 Fabrice Bellard
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include "qemu/osdep.h"
-#include "qemu/thread.h"
-#include "hw/core/cpu.h"
-#include "qemu/main-loop.h"
-#include "sysemu/cpus.h"
-#include "sysemu/cpu-throttle.h"
-#include "trace.h"
-
-/* vcpu throttling controls */
-static QEMUTimer *throttle_timer;
-static unsigned int throttle_percentage;
-
-#define CPU_THROTTLE_PCT_MIN 1
-#define CPU_THROTTLE_PCT_MAX 99
-#define CPU_THROTTLE_TIMESLICE_NS 10000000
-
-static void cpu_throttle_thread(CPUState *cpu, run_on_cpu_data opaque)
-{
- double pct;
- double throttle_ratio;
- int64_t sleeptime_ns, endtime_ns;
-
- if (!cpu_throttle_get_percentage()) {
- return;
- }
-
- pct = (double)cpu_throttle_get_percentage() / 100;
- throttle_ratio = pct / (1 - pct);
- /* Add 1ns to fix double's rounding error (like 0.9999999...) */
- sleeptime_ns = (int64_t)(throttle_ratio * CPU_THROTTLE_TIMESLICE_NS + 1);
- endtime_ns = qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + sleeptime_ns;
- while (sleeptime_ns > 0 && !cpu->stop) {
- if (sleeptime_ns > SCALE_MS) {
- qemu_cond_timedwait_bql(cpu->halt_cond,
- sleeptime_ns / SCALE_MS);
- } else {
- bql_unlock();
- g_usleep(sleeptime_ns / SCALE_US);
- bql_lock();
- }
- sleeptime_ns = endtime_ns - qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
- }
- qatomic_set(&cpu->throttle_thread_scheduled, 0);
-}
-
-static void cpu_throttle_timer_tick(void *opaque)
-{
- CPUState *cpu;
- double pct;
-
- /* Stop the timer if needed */
- if (!cpu_throttle_get_percentage()) {
- return;
- }
- CPU_FOREACH(cpu) {
- if (!qatomic_xchg(&cpu->throttle_thread_scheduled, 1)) {
- async_run_on_cpu(cpu, cpu_throttle_thread,
- RUN_ON_CPU_NULL);
- }
- }
-
- pct = (double)cpu_throttle_get_percentage() / 100;
- timer_mod(throttle_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL_RT) +
- CPU_THROTTLE_TIMESLICE_NS / (1 - pct));
-}
-
-void cpu_throttle_set(int new_throttle_pct)
-{
- /*
- * boolean to store whether throttle is already active or not,
- * before modifying throttle_percentage
- */
- bool throttle_active = cpu_throttle_active();
-
- trace_cpu_throttle_set(new_throttle_pct);
-
- /* Ensure throttle percentage is within valid range */
- new_throttle_pct = MIN(new_throttle_pct, CPU_THROTTLE_PCT_MAX);
- new_throttle_pct = MAX(new_throttle_pct, CPU_THROTTLE_PCT_MIN);
-
- qatomic_set(&throttle_percentage, new_throttle_pct);
-
- if (!throttle_active) {
- cpu_throttle_timer_tick(NULL);
- }
-}
-
-void cpu_throttle_stop(void)
-{
- qatomic_set(&throttle_percentage, 0);
-}
-
-bool cpu_throttle_active(void)
-{
- return (cpu_throttle_get_percentage() != 0);
-}
-
-int cpu_throttle_get_percentage(void)
-{
- return qatomic_read(&throttle_percentage);
-}
-
-void cpu_throttle_init(void)
-{
- throttle_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL_RT,
- cpu_throttle_timer_tick, NULL);
-}
#include "sysemu/runstate.h"
#include "hw/core/cpu.h"
#include "sysemu/cpu-timers.h"
-#include "sysemu/cpu-throttle.h"
#include "sysemu/cpu-timers-internal.h"
/* clock and ticks */
seqlock_init(&timers_state.vm_clock_seqlock);
qemu_spin_init(&timers_state.vm_clock_lock);
vmstate_register(NULL, 0, &vmstate_timers, &timers_state);
-
- cpu_throttle_init();
}
'balloon.c',
'bootdevice.c',
'cpus.c',
- 'cpu-throttle.c',
'cpu-timers.c',
'datadir.c',
'dirtylimit.c',
dirtylimit_throttle_pct(int cpu_index, uint64_t pct, int64_t time_us) "CPU[%d] throttle percent: %" PRIu64 ", throttle adjust time %"PRIi64 " us"
dirtylimit_set_vcpu(int cpu_index, uint64_t quota) "CPU[%d] set dirty page rate limit %"PRIu64
dirtylimit_vcpu_execute(int cpu_index, int64_t sleep_time_us) "CPU[%d] sleep %"PRIi64 " us"
-
-# cpu-throttle.c
-cpu_throttle_set(int new_throttle_pct) "set guest CPU throttled by %d%%"
projects / qemu.git / commitdiff