system: Rename softmmu/ directory as system/

[thirdparty/qemu.git] / softmmu / cpu-throttle.c

diff --git a/softmmu/cpu-throttle.c b/softmmu/cpu-throttle.c
deleted file mode 100644 (file)
index d9bb30a..0000000
--- a/softmmu/cpu-throttle.c
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
- * 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"
-
-/* 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_iothread(cpu->halt_cond,
-                                         sleeptime_ns / SCALE_MS);
-        } else {
-            qemu_mutex_unlock_iothread();
-            g_usleep(sleeptime_ns / SCALE_US);
-            qemu_mutex_lock_iothread();
-        }
-        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();
-
-    /* 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);
-}