diff options
Diffstat (limited to 'kernel/timer.c')
-rw-r--r-- | kernel/timer.c | 54 |
1 files changed, 2 insertions, 52 deletions
diff --git a/kernel/timer.c b/kernel/timer.c index cffffad01c31..6a21d7af9620 100644 --- a/kernel/timer.c +++ b/kernel/timer.c | |||
@@ -1123,47 +1123,6 @@ void update_process_times(int user_tick) | |||
1123 | } | 1123 | } |
1124 | 1124 | ||
1125 | /* | 1125 | /* |
1126 | * Nr of active tasks - counted in fixed-point numbers | ||
1127 | */ | ||
1128 | static unsigned long count_active_tasks(void) | ||
1129 | { | ||
1130 | return nr_active() * FIXED_1; | ||
1131 | } | ||
1132 | |||
1133 | /* | ||
1134 | * Hmm.. Changed this, as the GNU make sources (load.c) seems to | ||
1135 | * imply that avenrun[] is the standard name for this kind of thing. | ||
1136 | * Nothing else seems to be standardized: the fractional size etc | ||
1137 | * all seem to differ on different machines. | ||
1138 | * | ||
1139 | * Requires xtime_lock to access. | ||
1140 | */ | ||
1141 | unsigned long avenrun[3]; | ||
1142 | |||
1143 | EXPORT_SYMBOL(avenrun); | ||
1144 | |||
1145 | /* | ||
1146 | * calc_load - given tick count, update the avenrun load estimates. | ||
1147 | * This is called while holding a write_lock on xtime_lock. | ||
1148 | */ | ||
1149 | static inline void calc_load(unsigned long ticks) | ||
1150 | { | ||
1151 | unsigned long active_tasks; /* fixed-point */ | ||
1152 | static int count = LOAD_FREQ; | ||
1153 | |||
1154 | count -= ticks; | ||
1155 | if (unlikely(count < 0)) { | ||
1156 | active_tasks = count_active_tasks(); | ||
1157 | do { | ||
1158 | CALC_LOAD(avenrun[0], EXP_1, active_tasks); | ||
1159 | CALC_LOAD(avenrun[1], EXP_5, active_tasks); | ||
1160 | CALC_LOAD(avenrun[2], EXP_15, active_tasks); | ||
1161 | count += LOAD_FREQ; | ||
1162 | } while (count < 0); | ||
1163 | } | ||
1164 | } | ||
1165 | |||
1166 | /* | ||
1167 | * This function runs timers and the timer-tq in bottom half context. | 1126 | * This function runs timers and the timer-tq in bottom half context. |
1168 | */ | 1127 | */ |
1169 | static void run_timer_softirq(struct softirq_action *h) | 1128 | static void run_timer_softirq(struct softirq_action *h) |
@@ -1187,16 +1146,6 @@ void run_local_timers(void) | |||
1187 | } | 1146 | } |
1188 | 1147 | ||
1189 | /* | 1148 | /* |
1190 | * Called by the timer interrupt. xtime_lock must already be taken | ||
1191 | * by the timer IRQ! | ||
1192 | */ | ||
1193 | static inline void update_times(unsigned long ticks) | ||
1194 | { | ||
1195 | update_wall_time(); | ||
1196 | calc_load(ticks); | ||
1197 | } | ||
1198 | |||
1199 | /* | ||
1200 | * The 64-bit jiffies value is not atomic - you MUST NOT read it | 1149 | * The 64-bit jiffies value is not atomic - you MUST NOT read it |
1201 | * without sampling the sequence number in xtime_lock. | 1150 | * without sampling the sequence number in xtime_lock. |
1202 | * jiffies is defined in the linker script... | 1151 | * jiffies is defined in the linker script... |
@@ -1205,7 +1154,8 @@ static inline void update_times(unsigned long ticks) | |||
1205 | void do_timer(unsigned long ticks) | 1154 | void do_timer(unsigned long ticks) |
1206 | { | 1155 | { |
1207 | jiffies_64 += ticks; | 1156 | jiffies_64 += ticks; |
1208 | update_times(ticks); | 1157 | update_wall_time(); |
1158 | calc_global_load(); | ||
1209 | } | 1159 | } |
1210 | 1160 | ||
1211 | #ifdef __ARCH_WANT_SYS_ALARM | 1161 | #ifdef __ARCH_WANT_SYS_ALARM |