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authorArjan van de Ven <arjan@linux.intel.com>2007-02-05 20:59:51 -0500
committerDavid S. Miller <davem@sunset.davemloft.net>2007-02-08 15:38:52 -0500
commitf5a6e01c093ca60c0cab15c47c8e7e199fbbc9e6 (patch)
tree6d7a09c26917bebf6faeb13f90eaec230c4311e0 /net/core/dst.c
parent104439a8876a98eac1b6593907a3c7bc51e362fe (diff)
[NET]: user of the jiffies rounding code: Networking
This patch introduces users of the round_jiffies() function in the networking code. These timers all were of the "about once a second" or "about once every X seconds" variety and several showed up in the "what wakes the cpu up" profiles that the tickless patches provide. Some timers are highly dynamic based on network load; but even on low activity systems they still show up so the rounding is done only in cases of low activity, allowing higher frequency timers in the high activity case. The various hardware watchdogs are an obvious case; they run every 2 seconds but aren't otherwise specific of exactly when they need to run. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/dst.c')
-rw-r--r--net/core/dst.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/net/core/dst.c b/net/core/dst.c
index 836ec6606925..1a53fb39b7e0 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -99,7 +99,14 @@ static void dst_run_gc(unsigned long dummy)
99 printk("dst_total: %d/%d %ld\n", 99 printk("dst_total: %d/%d %ld\n",
100 atomic_read(&dst_total), delayed, dst_gc_timer_expires); 100 atomic_read(&dst_total), delayed, dst_gc_timer_expires);
101#endif 101#endif
102 mod_timer(&dst_gc_timer, jiffies + dst_gc_timer_expires); 102 /* if the next desired timer is more than 4 seconds in the future
103 * then round the timer to whole seconds
104 */
105 if (dst_gc_timer_expires > 4*HZ)
106 mod_timer(&dst_gc_timer,
107 round_jiffies(jiffies + dst_gc_timer_expires));
108 else
109 mod_timer(&dst_gc_timer, jiffies + dst_gc_timer_expires);
103 110
104out: 111out:
105 spin_unlock(&dst_lock); 112 spin_unlock(&dst_lock);