diff options
author | Alex Bligh <alex@alex.org.uk> | 2013-08-21 16:02:46 +0100 |
---|---|---|
committer | Stefan Hajnoczi <stefanha@redhat.com> | 2013-08-22 19:10:27 +0200 |
commit | ff83c66eccf5b5f6b6530d504e3be41559250dcb (patch) | |
tree | 85fbeb62b89962d992b6ad94827687313b1ec335 | |
parent | f9a976b7408f061fc7fc48b14d16797ed6f8fd97 (diff) | |
download | hqemu-ff83c66eccf5b5f6b6530d504e3be41559250dcb.zip hqemu-ff83c66eccf5b5f6b6530d504e3be41559250dcb.tar.gz |
aio / timers: Split QEMUClock into QEMUClock and QEMUTimerList
Split QEMUClock into QEMUClock and QEMUTimerList so that we can
have more than one QEMUTimerList associated with the same clock.
Introduce a main_loop_timerlist concept and make existing
qemu_clock_* calls that actually should operate on a QEMUTimerList
call the relevant QEMUTimerList implementations, using the clock's
default timerlist. This vastly reduces the invasiveness of this
change and means the API stays constant for existing users.
Introduce a list of QEMUTimerLists associated with each clock
so that reenabling the clock can cause all the notifiers
to be called. Note the code to do the notifications is added
in a later patch.
Switch QEMUClockType to an enum. Remove global variables vm_clock,
host_clock and rt_clock and add compatibility defines. Do not
fix qemu_next_alarm_deadline as it's going to be deleted.
Add qemu_clock_use_for_deadline to indicate whether a particular
clock should be used for deadline calculations. When use_icount
is true, vm_clock should not be used for deadline calculations
as it does not contain a nanosecond count. Instead, icount
timeouts come from the execution thread doing aio_notify or
qemu_notify as appropriate. This function is used in the next
patch.
Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
-rw-r--r-- | include/qemu/timer.h | 348 | ||||
-rw-r--r-- | qemu-timer.c | 207 |
2 files changed, 476 insertions, 79 deletions
diff --git a/include/qemu/timer.h b/include/qemu/timer.h index 962eca8..b4a7ba0 100644 --- a/include/qemu/timer.h +++ b/include/qemu/timer.h @@ -1,6 +1,7 @@ #ifndef QEMU_TIMER_H #define QEMU_TIMER_H +#include "qemu/typedefs.h" #include "qemu-common.h" #include "qemu/main-loop.h" #include "qemu/notify.h" @@ -11,34 +12,84 @@ #define SCALE_US 1000 #define SCALE_NS 1 -#define QEMU_CLOCK_REALTIME 0 -#define QEMU_CLOCK_VIRTUAL 1 -#define QEMU_CLOCK_HOST 2 +/** + * QEMUClockType: + * + * The following clock types are available: + * + * @QEMU_CLOCK_REALTIME: Real time clock + * + * The real time clock should be used only for stuff which does not + * change the virtual machine state, as it is run even if the virtual + * machine is stopped. The real time clock has a frequency of 1000 + * Hz. + * + * Formerly rt_clock + * + * @QEMU_CLOCK_VIRTUAL: virtual clock + * + * The virtual clock is only run during the emulation. It is stopped + * when the virtual machine is stopped. Virtual timers use a high + * precision clock, usually cpu cycles (use ticks_per_sec). + * + * Formerly vm_clock + * + * @QEMU_CLOCK_HOST: host clock + * + * The host clock should be use for device models that emulate accurate + * real time sources. It will continue to run when the virtual machine + * is suspended, and it will reflect system time changes the host may + * undergo (e.g. due to NTP). The host clock has the same precision as + * the virtual clock. + * + * Formerly host_clock + */ + +typedef enum { + QEMU_CLOCK_REALTIME = 0, + QEMU_CLOCK_VIRTUAL = 1, + QEMU_CLOCK_HOST = 2, + QEMU_CLOCK_MAX +} QEMUClockType; typedef struct QEMUClock QEMUClock; +typedef struct QEMUTimerList QEMUTimerList; typedef void QEMUTimerCB(void *opaque); -/* The real time clock should be used only for stuff which does not - change the virtual machine state, as it is run even if the virtual - machine is stopped. The real time clock has a frequency of 1000 - Hz. */ -extern QEMUClock *rt_clock; +struct QEMUTimer { + int64_t expire_time; /* in nanoseconds */ + QEMUTimerList *timer_list; + QEMUTimerCB *cb; + void *opaque; + QEMUTimer *next; + int scale; +}; + +extern QEMUClock *qemu_clocks[QEMU_CLOCK_MAX]; -/* The virtual clock is only run during the emulation. It is stopped - when the virtual machine is stopped. Virtual timers use a high - precision clock, usually cpu cycles (use ticks_per_sec). */ -extern QEMUClock *vm_clock; +/** + * qemu_clock_ptr: + * @type: type of clock + * + * Translate a clock type into a pointer to QEMUClock object. + * + * Returns: a pointer to the QEMUClock object + */ +static inline QEMUClock *qemu_clock_ptr(QEMUClockType type) +{ + return qemu_clocks[type]; +} -/* The host clock should be use for device models that emulate accurate - real time sources. It will continue to run when the virtual machine - is suspended, and it will reflect system time changes the host may - undergo (e.g. due to NTP). The host clock has the same precision as - the virtual clock. */ -extern QEMUClock *host_clock; +/* These three clocks are maintained here with separate variable + * names for compatibility only. + */ +#define rt_clock (qemu_clock_ptr(QEMU_CLOCK_REALTIME)) +#define vm_clock (qemu_clock_ptr(QEMU_CLOCK_VIRTUAL)) +#define host_clock (qemu_clock_ptr(QEMU_CLOCK_HOST)) int64_t qemu_get_clock_ns(QEMUClock *clock); -int64_t qemu_clock_has_timers(QEMUClock *clock); -int64_t qemu_clock_expired(QEMUClock *clock); +bool qemu_clock_has_timers(QEMUClock *clock); +bool qemu_clock_expired(QEMUClock *clock); int64_t qemu_clock_deadline(QEMUClock *clock); /** @@ -53,6 +104,121 @@ int64_t qemu_clock_deadline(QEMUClock *clock); int64_t qemu_clock_deadline_ns(QEMUClock *clock); /** + * qemu_clock_use_for_deadline: + * @clock: the clock to operate on + * + * Determine whether a clock should be used for deadline + * calculations. Some clocks, for instance vm_clock with + * use_icount set, do not count in nanoseconds. Such clocks + * are not used for deadline calculations, and are presumed + * to interrupt any poll using qemu_notify/aio_notify + * etc. + * + * Returns: true if the clock runs in nanoseconds and + * should be used for a deadline. + */ +bool qemu_clock_use_for_deadline(QEMUClock *clock); + +/** + * qemu_clock_get_main_loop_timerlist: + * @clock: the clock to operate on + * + * Return the default timer list assocatiated with a clock. + * + * Returns: the default timer list + */ +QEMUTimerList *qemu_clock_get_main_loop_timerlist(QEMUClock *clock); + +/** + * timerlist_new: + * @type: the clock type to associate with the timerlist + * + * Create a new timerlist associated with the clock of + * type @type. + * + * Returns: a pointer to the QEMUTimerList created + */ +QEMUTimerList *timerlist_new(QEMUClockType type); + +/** + * timerlist_free: + * @timer_list: the timer list to free + * + * Frees a timer_list. It must have no active timers. + */ +void timerlist_free(QEMUTimerList *timer_list); + +/** + * timerlist_has_timers: + * @timer_list: the timer list to operate on + * + * Determine whether a timer list has active timers + * + * Returns: true if the timer list has timers. + */ +bool timerlist_has_timers(QEMUTimerList *timer_list); + +/** + * timerlist_expired: + * @timer_list: the timer list to operate on + * + * Determine whether a timer list has any timers which + * are expired. + * + * Returns: true if the timer list has timers which + * have expired. + */ +bool timerlist_expired(QEMUTimerList *timer_list); + +/** + * timerlist_deadline: + * @timer_list: the timer list to operate on + * + * Determine the deadline for a timer_list. This is + * a legacy function which returns INT32_MAX if the + * timer list has no timers or if the earliest timer + * expires later than INT32_MAX nanoseconds away. + * + * Returns: the number of nanoseconds until the earliest + * timer expires or INT32_MAX in the situations listed + * above + */ +int64_t timerlist_deadline(QEMUTimerList *timer_list); + +/** + * timerlist_deadline_ns: + * @timer_list: the timer list to operate on + * + * Determine the deadline for a timer_list, i.e. + * the number of nanoseconds until the first timer + * expires. Return -1 if there are no timers. + * + * Returns: the number of nanoseconds until the earliest + * timer expires -1 if none + */ +int64_t timerlist_deadline_ns(QEMUTimerList *timer_list); + +/** + * timerlist_getclock: + * @timer_list: the timer list to operate on + * + * Determine the clock associated with a timer list. + * + * Returns: the clock associated with the timer list. + */ +QEMUClock *timerlist_get_clock(QEMUTimerList *timer_list); + +/** + * timerlist_run_timers: + * @timer_list: the timer list to use + * + * Call all expired timers associated with the timer list. + * + * Returns: true if any timer expired + */ +bool timerlist_run_timers(QEMUTimerList *timer_list); + +/** * qemu_timeout_ns_to_ms: * @ns: nanosecond timeout value * @@ -84,6 +250,50 @@ void qemu_unregister_clock_reset_notifier(QEMUClock *clock, QEMUTimer *qemu_new_timer(QEMUClock *clock, int scale, QEMUTimerCB *cb, void *opaque); + +/** + * timer_init: + * @ts: the timer to be initialised + * @timer_list: the timer list to attach the timer to + * @scale: the scale value for the tiemr + * @cb: the callback to be called when the timer expires + * @opaque: the opaque pointer to be passed to the callback + * + * Initialise a new timer and associate it with @timer_list. + * The caller is responsible for allocating the memory. + * + * You need not call an explicit deinit call. Simply make + * sure it is not on a list with timer_del. + */ +void timer_init(QEMUTimer *ts, + QEMUTimerList *timer_list, int scale, + QEMUTimerCB *cb, void *opaque); + +/** + * timer_new_tl: + * @timer_list: the timer list to attach the timer to + * @scale: the scale value for the tiemr + * @cb: the callback to be called when the timer expires + * @opaque: the opaque pointer to be passed to the callback + * + * Creeate a new timer and associate it with @timer_list. + * The memory is allocated by the function. + * + * This is not the preferred interface unless you know you + * are going to call timer_free. Use timer_init instead. + * + * Returns: a pointer to the timer + */ +static inline QEMUTimer *timer_new_tl(QEMUTimerList *timer_list, + int scale, + QEMUTimerCB *cb, + void *opaque) +{ + QEMUTimer *ts = g_malloc0(sizeof(QEMUTimer)); + timer_init(ts, timer_list, scale, cb, opaque); + return ts; +} + void qemu_free_timer(QEMUTimer *ts); void qemu_del_timer(QEMUTimer *ts); void qemu_mod_timer_ns(QEMUTimer *ts, int64_t expire_time); @@ -92,11 +302,61 @@ bool timer_pending(QEMUTimer *ts); bool timer_expired(QEMUTimer *timer_head, int64_t current_time); uint64_t timer_expire_time_ns(QEMUTimer *ts); +/* New format calling conventions for timers */ + +/** + * timer_free: + * @ts: the timer + * + * Free a timer (it must not be on the active list) + */ +static inline void timer_free(QEMUTimer *ts) +{ + qemu_free_timer(ts); +} + +/** + * timer_del: + * @ts: the timer + * + * Delete a timer from the active list. + */ +static inline void timer_del(QEMUTimer *ts) +{ + qemu_del_timer(ts); +} + +/** + * timer_mod_ns: + * @ts: the timer + * @expire_time: the expiry time in nanoseconds + * + * Modify a timer to expire at @expire_time + */ +static inline void timer_mod_ns(QEMUTimer *ts, int64_t expire_time) +{ + qemu_mod_timer_ns(ts, expire_time); +} + +/** + * timer_mod: + * @ts: the timer + * @expire_time: the expire time in the units associated with the timer + * + * Modify a timer to expiry at @expire_time, taking into + * account the scale associated with the timer. + */ +static inline void timer_mod(QEMUTimer *ts, int64_t expire_timer) +{ + qemu_mod_timer(ts, expire_timer); +} + /** * qemu_run_timers: * @clock: clock on which to operate * - * Run all the timers associated with a clock. + * Run all the timers associated with the default timer list + * of a clock. * * Returns: true if any timer ran. */ @@ -105,7 +365,8 @@ bool qemu_run_timers(QEMUClock *clock); /** * qemu_run_all_timers: * - * Run all the timers associated with every clock. + * Run all the timers associated with the default timer list + * of every clock. * * Returns: true if any timer ran. */ @@ -138,13 +399,54 @@ static inline int64_t qemu_soonest_timeout(int64_t timeout1, int64_t timeout2) return ((uint64_t) timeout1 < (uint64_t) timeout2) ? timeout1 : timeout2; } +/** + * qemu_new_timer_ns: + * @clock: the clock to associate with the timer + * @callback: the callback to call when the timer expires + * @opaque: the opaque pointer to pass to the callback + * + * Create a new timer with nanosecond scale on the default timer list + * associated with the clock. + * + * Returns: a pointer to the newly created timer + */ static inline QEMUTimer *qemu_new_timer_ns(QEMUClock *clock, QEMUTimerCB *cb, void *opaque) { return qemu_new_timer(clock, SCALE_NS, cb, opaque); } -static inline QEMUTimer *qemu_new_timer_ms(QEMUClock *clock, QEMUTimerCB *cb, +/** + * qemu_new_timer_us: + * @clock: the clock to associate with the timer + * @callback: the callback to call when the timer expires + * @opaque: the opaque pointer to pass to the callback + * + * Create a new timer with microsecond scale on the default timer list + * associated with the clock. + * + * Returns: a pointer to the newly created timer + */ +static inline QEMUTimer *qemu_new_timer_us(QEMUClock *clock, + QEMUTimerCB *cb, + void *opaque) +{ + return qemu_new_timer(clock, SCALE_US, cb, opaque); +} + +/** + * qemu_new_timer_ms: + * @clock: the clock to associate with the timer + * @callback: the callback to call when the timer expires + * @opaque: the opaque pointer to pass to the callback + * + * Create a new timer with millisecond scale on the default timer list + * associated with the clock. + * + * Returns: a pointer to the newly created timer + */ +static inline QEMUTimer *qemu_new_timer_ms(QEMUClock *clock, + QEMUTimerCB *cb, void *opaque) { return qemu_new_timer(clock, SCALE_MS, cb, opaque); diff --git a/qemu-timer.c b/qemu-timer.c index 52a1947..b045184 100644 --- a/qemu-timer.c +++ b/qemu-timer.c @@ -49,22 +49,29 @@ /* timers */ struct QEMUClock { - QEMUTimer *active_timers; + QEMUTimerList *main_loop_timerlist; + QLIST_HEAD(, QEMUTimerList) timerlists; NotifierList reset_notifiers; int64_t last; - int type; + QEMUClockType type; bool enabled; }; -struct QEMUTimer { - int64_t expire_time; /* in nanoseconds */ +QEMUClock *qemu_clocks[QEMU_CLOCK_MAX]; + +/* A QEMUTimerList is a list of timers attached to a clock. More + * than one QEMUTimerList can be attached to each clock, for instance + * used by different AioContexts / threads. Each clock also has + * a list of the QEMUTimerLists associated with it, in order that + * reenabling the clock can call all the notifiers. + */ + +struct QEMUTimerList { QEMUClock *clock; - QEMUTimerCB *cb; - void *opaque; - QEMUTimer *next; - int scale; + QEMUTimer *active_timers; + QLIST_ENTRY(QEMUTimerList) list; }; struct qemu_alarm_timer { @@ -93,21 +100,25 @@ static int64_t qemu_next_alarm_deadline(void) { int64_t delta = INT64_MAX; int64_t rtdelta; + int64_t hdelta; - if (!use_icount && vm_clock->enabled && vm_clock->active_timers) { - delta = vm_clock->active_timers->expire_time - - qemu_get_clock_ns(vm_clock); + if (!use_icount && vm_clock->enabled && + vm_clock->main_loop_timerlist->active_timers) { + delta = vm_clock->main_loop_timerlist->active_timers->expire_time - + qemu_get_clock_ns(vm_clock); } - if (host_clock->enabled && host_clock->active_timers) { - int64_t hdelta = host_clock->active_timers->expire_time - - qemu_get_clock_ns(host_clock); + if (host_clock->enabled && + host_clock->main_loop_timerlist->active_timers) { + hdelta = host_clock->main_loop_timerlist->active_timers->expire_time - + qemu_get_clock_ns(host_clock); if (hdelta < delta) { delta = hdelta; } } - if (rt_clock->enabled && rt_clock->active_timers) { - rtdelta = (rt_clock->active_timers->expire_time - - qemu_get_clock_ns(rt_clock)); + if (rt_clock->enabled && + rt_clock->main_loop_timerlist->active_timers) { + rtdelta = (rt_clock->main_loop_timerlist->active_timers->expire_time - + qemu_get_clock_ns(rt_clock)); if (rtdelta < delta) { delta = rtdelta; } @@ -231,11 +242,42 @@ next: } } -QEMUClock *rt_clock; -QEMUClock *vm_clock; -QEMUClock *host_clock; +static QEMUTimerList *timerlist_new_from_clock(QEMUClock *clock) +{ + QEMUTimerList *timer_list; + + /* Assert if we do not have a clock. If you see this + * assertion in means that the clocks have not been + * initialised before a timerlist is needed. This + * normally happens if an AioContext is used before + * init_clocks() is called within main(). + */ + assert(clock); + + timer_list = g_malloc0(sizeof(QEMUTimerList)); + timer_list->clock = clock; + QLIST_INSERT_HEAD(&clock->timerlists, timer_list, list); + return timer_list; +} + +QEMUTimerList *timerlist_new(QEMUClockType type) +{ + return timerlist_new_from_clock(qemu_clock_ptr(type)); +} -static QEMUClock *qemu_clock_new(int type) +void timerlist_free(QEMUTimerList *timer_list) +{ + assert(!timerlist_has_timers(timer_list)); + if (timer_list->clock) { + QLIST_REMOVE(timer_list, list); + if (timer_list->clock->main_loop_timerlist == timer_list) { + timer_list->clock->main_loop_timerlist = NULL; + } + } + g_free(timer_list); +} + +static QEMUClock *qemu_clock_new(QEMUClockType type) { QEMUClock *clock; @@ -243,10 +285,17 @@ static QEMUClock *qemu_clock_new(int type) clock->type = type; clock->enabled = true; clock->last = INT64_MIN; + QLIST_INIT(&clock->timerlists); notifier_list_init(&clock->reset_notifiers); + clock->main_loop_timerlist = timerlist_new_from_clock(clock); return clock; } +bool qemu_clock_use_for_deadline(QEMUClock *clock) +{ + return !(use_icount && (clock->type == QEMU_CLOCK_VIRTUAL)); +} + void qemu_clock_enable(QEMUClock *clock, bool enabled) { bool old = clock->enabled; @@ -256,24 +305,36 @@ void qemu_clock_enable(QEMUClock *clock, bool enabled) } } -int64_t qemu_clock_has_timers(QEMUClock *clock) +bool timerlist_has_timers(QEMUTimerList *timer_list) { - return !!clock->active_timers; + return !!timer_list->active_timers; } -int64_t qemu_clock_expired(QEMUClock *clock) +bool qemu_clock_has_timers(QEMUClock *clock) { - return (clock->active_timers && - clock->active_timers->expire_time < qemu_get_clock_ns(clock)); + return timerlist_has_timers(clock->main_loop_timerlist); } -int64_t qemu_clock_deadline(QEMUClock *clock) +bool timerlist_expired(QEMUTimerList *timer_list) +{ + return (timer_list->active_timers && + timer_list->active_timers->expire_time < + qemu_get_clock_ns(timer_list->clock)); +} + +bool qemu_clock_expired(QEMUClock *clock) +{ + return timerlist_expired(clock->main_loop_timerlist); +} + +int64_t timerlist_deadline(QEMUTimerList *timer_list) { /* To avoid problems with overflow limit this to 2^32. */ int64_t delta = INT32_MAX; - if (clock->enabled && clock->active_timers) { - delta = clock->active_timers->expire_time - qemu_get_clock_ns(clock); + if (timer_list->clock->enabled && timer_list->active_timers) { + delta = timer_list->active_timers->expire_time - + qemu_get_clock_ns(timer_list->clock); } if (delta < 0) { delta = 0; @@ -281,20 +342,26 @@ int64_t qemu_clock_deadline(QEMUClock *clock) return delta; } +int64_t qemu_clock_deadline(QEMUClock *clock) +{ + return timerlist_deadline(clock->main_loop_timerlist); +} + /* * As above, but return -1 for no deadline, and do not cap to 2^32 * as we know the result is always positive. */ -int64_t qemu_clock_deadline_ns(QEMUClock *clock) +int64_t timerlist_deadline_ns(QEMUTimerList *timer_list) { int64_t delta; - if (!clock->enabled || !clock->active_timers) { + if (!timer_list->clock->enabled || !timer_list->active_timers) { return -1; } - delta = clock->active_timers->expire_time - qemu_get_clock_ns(clock); + delta = timer_list->active_timers->expire_time - + qemu_get_clock_ns(timer_list->clock); if (delta <= 0) { return 0; @@ -303,6 +370,21 @@ int64_t qemu_clock_deadline_ns(QEMUClock *clock) return delta; } +int64_t qemu_clock_deadline_ns(QEMUClock *clock) +{ + return timerlist_deadline_ns(clock->main_loop_timerlist); +} + +QEMUClock *timerlist_get_clock(QEMUTimerList *timer_list) +{ + return timer_list->clock; +} + +QEMUTimerList *qemu_clock_get_main_loop_timerlist(QEMUClock *clock) +{ + return clock->main_loop_timerlist; +} + /* Transition function to convert a nanosecond timeout to ms * This is used where a system does not support ppoll */ @@ -351,17 +433,21 @@ int qemu_poll_ns(GPollFD *fds, guint nfds, int64_t timeout) } -QEMUTimer *qemu_new_timer(QEMUClock *clock, int scale, - QEMUTimerCB *cb, void *opaque) +void timer_init(QEMUTimer *ts, + QEMUTimerList *timer_list, int scale, + QEMUTimerCB *cb, void *opaque) { - QEMUTimer *ts; - - ts = g_malloc0(sizeof(QEMUTimer)); - ts->clock = clock; + ts->timer_list = timer_list; ts->cb = cb; ts->opaque = opaque; ts->scale = scale; - return ts; +} + +QEMUTimer *qemu_new_timer(QEMUClock *clock, int scale, + QEMUTimerCB *cb, void *opaque) +{ + return timer_new_tl(clock->main_loop_timerlist, + scale, cb, opaque); } void qemu_free_timer(QEMUTimer *ts) @@ -376,7 +462,7 @@ void qemu_del_timer(QEMUTimer *ts) /* NOTE: this code must be signal safe because timer_expired() can be called from a signal. */ - pt = &ts->clock->active_timers; + pt = &ts->timer_list->active_timers; for(;;) { t = *pt; if (!t) @@ -400,7 +486,7 @@ void qemu_mod_timer_ns(QEMUTimer *ts, int64_t expire_time) /* add the timer in the sorted list */ /* NOTE: this code must be signal safe because timer_expired() can be called from a signal. */ - pt = &ts->clock->active_timers; + pt = &ts->timer_list->active_timers; for(;;) { t = *pt; if (!timer_expired_ns(t, expire_time)) { @@ -413,12 +499,12 @@ void qemu_mod_timer_ns(QEMUTimer *ts, int64_t expire_time) *pt = ts; /* Rearm if necessary */ - if (pt == &ts->clock->active_timers) { + if (pt == &ts->timer_list->active_timers) { if (!alarm_timer->pending) { qemu_rearm_alarm_timer(alarm_timer); } /* Interrupt execution to force deadline recalculation. */ - qemu_clock_warp(ts->clock); + qemu_clock_warp(ts->timer_list->clock); if (use_icount) { qemu_notify_event(); } @@ -433,7 +519,7 @@ void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time) bool timer_pending(QEMUTimer *ts) { QEMUTimer *t; - for (t = ts->clock->active_timers; t != NULL; t = t->next) { + for (t = ts->timer_list->active_timers; t != NULL; t = t->next) { if (t == ts) { return true; } @@ -446,23 +532,24 @@ bool timer_expired(QEMUTimer *timer_head, int64_t current_time) return timer_expired_ns(timer_head, current_time * timer_head->scale); } -bool qemu_run_timers(QEMUClock *clock) +bool timerlist_run_timers(QEMUTimerList *timer_list) { QEMUTimer *ts; int64_t current_time; bool progress = false; - if (!clock->enabled) + if (!timer_list->clock->enabled) { return progress; + } - current_time = qemu_get_clock_ns(clock); + current_time = qemu_get_clock_ns(timer_list->clock); for(;;) { - ts = clock->active_timers; + ts = timer_list->active_timers; if (!timer_expired_ns(ts, current_time)) { break; } /* remove timer from the list before calling the callback */ - clock->active_timers = ts->next; + timer_list->active_timers = ts->next; ts->next = NULL; /* run the callback (the timer list can be modified) */ @@ -472,6 +559,11 @@ bool qemu_run_timers(QEMUClock *clock) return progress; } +bool qemu_run_timers(QEMUClock *clock) +{ + return timerlist_run_timers(clock->main_loop_timerlist); +} + int64_t qemu_get_clock_ns(QEMUClock *clock) { int64_t now, last; @@ -509,11 +601,13 @@ void qemu_unregister_clock_reset_notifier(QEMUClock *clock, Notifier *notifier) void init_clocks(void) { - if (!rt_clock) { - rt_clock = qemu_clock_new(QEMU_CLOCK_REALTIME); - vm_clock = qemu_clock_new(QEMU_CLOCK_VIRTUAL); - host_clock = qemu_clock_new(QEMU_CLOCK_HOST); + QEMUClockType type; + for (type = 0; type < QEMU_CLOCK_MAX; type++) { + if (!qemu_clocks[type]) { + qemu_clocks[type] = qemu_clock_new(type); + } } + #ifdef CONFIG_PRCTL_PR_SET_TIMERSLACK prctl(PR_SET_TIMERSLACK, 1, 0, 0, 0); #endif @@ -530,9 +624,10 @@ bool qemu_run_all_timers(void) alarm_timer->pending = false; /* vm time timers */ - progress |= qemu_run_timers(vm_clock); - progress |= qemu_run_timers(rt_clock); - progress |= qemu_run_timers(host_clock); + QEMUClockType type; + for (type = 0; type < QEMU_CLOCK_MAX; type++) { + progress |= qemu_run_timers(qemu_clock_ptr(type)); + } /* rearm timer, if not periodic */ if (alarm_timer->expired) { |