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-rw-r--r--net/sched/sch_api.c77
1 files changed, 2 insertions, 75 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 4a927a5e1fa6..d71bf79eb80b 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -1175,15 +1175,12 @@ reclassify:
1175 return -1; 1175 return -1;
1176} 1176}
1177 1177
1178static int psched_us_per_tick = 1;
1179static int psched_tick_per_us = 1;
1180
1181#ifdef CONFIG_PROC_FS 1178#ifdef CONFIG_PROC_FS
1182static int psched_show(struct seq_file *seq, void *v) 1179static int psched_show(struct seq_file *seq, void *v)
1183{ 1180{
1184 seq_printf(seq, "%08x %08x %08x %08x\n", 1181 seq_printf(seq, "%08x %08x %08x %08x\n",
1185 psched_tick_per_us, psched_us_per_tick, 1182 (u32)NSEC_PER_USEC, (u32)PSCHED_US2NS(1),
1186 1000000, HZ); 1183 1000000, HZ);
1187 1184
1188 return 0; 1185 return 0;
1189} 1186}
@@ -1202,80 +1199,10 @@ static const struct file_operations psched_fops = {
1202}; 1199};
1203#endif 1200#endif
1204 1201
1205#ifdef CONFIG_NET_SCH_CLK_CPU
1206psched_tdiff_t psched_clock_per_hz;
1207int psched_clock_scale;
1208EXPORT_SYMBOL(psched_clock_per_hz);
1209EXPORT_SYMBOL(psched_clock_scale);
1210
1211psched_time_t psched_time_base;
1212cycles_t psched_time_mark;
1213EXPORT_SYMBOL(psched_time_mark);
1214EXPORT_SYMBOL(psched_time_base);
1215
1216/*
1217 * Periodically adjust psched_time_base to avoid overflow
1218 * with 32-bit get_cycles(). Safe up to 4GHz CPU.
1219 */
1220static void psched_tick(unsigned long);
1221static DEFINE_TIMER(psched_timer, psched_tick, 0, 0);
1222
1223static void psched_tick(unsigned long dummy)
1224{
1225 if (sizeof(cycles_t) == sizeof(u32)) {
1226 psched_time_t dummy_stamp;
1227 PSCHED_GET_TIME(dummy_stamp);
1228 psched_timer.expires = jiffies + 1*HZ;
1229 add_timer(&psched_timer);
1230 }
1231}
1232
1233int __init psched_calibrate_clock(void)
1234{
1235 psched_time_t stamp, stamp1;
1236 struct timeval tv, tv1;
1237 psched_tdiff_t delay;
1238 long rdelay;
1239 unsigned long stop;
1240
1241 psched_tick(0);
1242 stop = jiffies + HZ/10;
1243 PSCHED_GET_TIME(stamp);
1244 do_gettimeofday(&tv);
1245 while (time_before(jiffies, stop)) {
1246 barrier();
1247 cpu_relax();
1248 }
1249 PSCHED_GET_TIME(stamp1);
1250 do_gettimeofday(&tv1);
1251
1252 delay = PSCHED_TDIFF(stamp1, stamp);
1253 rdelay = tv1.tv_usec - tv.tv_usec;
1254 rdelay += (tv1.tv_sec - tv.tv_sec)*1000000;
1255 if (rdelay > delay)
1256 return -1;
1257 delay /= rdelay;
1258 psched_tick_per_us = delay;
1259 while ((delay>>=1) != 0)
1260 psched_clock_scale++;
1261 psched_us_per_tick = 1<<psched_clock_scale;
1262 psched_clock_per_hz = (psched_tick_per_us*(1000000/HZ))>>psched_clock_scale;
1263 return 0;
1264}
1265#endif
1266
1267static int __init pktsched_init(void) 1202static int __init pktsched_init(void)
1268{ 1203{
1269 struct rtnetlink_link *link_p; 1204 struct rtnetlink_link *link_p;
1270 1205
1271#ifdef CONFIG_NET_SCH_CLK_CPU
1272 if (psched_calibrate_clock() < 0)
1273 return -1;
1274#elif defined(CONFIG_NET_SCH_CLK_JIFFIES)
1275 psched_tick_per_us = HZ<<PSCHED_JSCALE;
1276 psched_us_per_tick = 1000000;
1277#endif
1278
1279 link_p = rtnetlink_links[PF_UNSPEC]; 1206 link_p = rtnetlink_links[PF_UNSPEC];
1280 1207
1281 /* Setup rtnetlink links. It is made here to avoid 1208 /* Setup rtnetlink links. It is made here to avoid