diff options
| author | Robert Olsson <robert.olsson@data.slu.se> | 2002-05-08 12:43:56 -0700 |
|---|---|---|
| committer | David S. Miller <davem@nuts.ninka.net> | 2002-05-08 12:43:56 -0700 |
| commit | 6445be80b80fd1f2aff91503c3b31ad57c838950 (patch) | |
| tree | 9ef9a9a2de45e2f1455f19236cb42d03b7d2bac6 | |
| parent | e53dd853f384c791da43fea73f32b17f011e479b (diff) | |
IPV4: Add statistics for route cache GC monitoring.
| -rw-r--r-- | include/net/route.h | 4 | ||||
| -rw-r--r-- | net/ipv4/route.c | 20 |
2 files changed, 21 insertions, 3 deletions
diff --git a/include/net/route.h b/include/net/route.h index d6812d468252..7ddc79e4d07e 100644 --- a/include/net/route.h +++ b/include/net/route.h @@ -110,6 +110,10 @@ struct rt_cache_stat unsigned int out_hit; unsigned int out_slow_tot; unsigned int out_slow_mc; + unsigned int gc_total; + unsigned int gc_ignored; + unsigned int gc_goal_miss; + unsigned int gc_dst_overflow; } ____cacheline_aligned_in_smp; extern struct ip_rt_acct *ip_rt_acct; diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 098312a7bf6a..efe2665b9420 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -286,7 +286,7 @@ static int rt_cache_stat_get_info(char *buffer, char **start, off_t offset, int for (lcpu = 0; lcpu < smp_num_cpus; lcpu++) { i = cpu_logical_map(lcpu); - len += sprintf(buffer+len, "%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x\n", + len += sprintf(buffer+len, "%08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x %08x \n", dst_entries, rt_cache_stat[i].in_hit, rt_cache_stat[i].in_slow_tot, @@ -298,7 +298,13 @@ static int rt_cache_stat_get_info(char *buffer, char **start, off_t offset, int rt_cache_stat[i].out_hit, rt_cache_stat[i].out_slow_tot, - rt_cache_stat[i].out_slow_mc + rt_cache_stat[i].out_slow_mc, + + rt_cache_stat[i].gc_total, + rt_cache_stat[i].gc_ignored, + rt_cache_stat[i].gc_goal_miss, + rt_cache_stat[i].gc_dst_overflow + ); } len -= offset; @@ -499,9 +505,14 @@ static int rt_garbage_collect(void) * Garbage collection is pretty expensive, * do not make it too frequently. */ + + rt_cache_stat[smp_processor_id()].gc_total++; + if (now - last_gc < ip_rt_gc_min_interval && - atomic_read(&ipv4_dst_ops.entries) < ip_rt_max_size) + atomic_read(&ipv4_dst_ops.entries) < ip_rt_max_size) { + rt_cache_stat[smp_processor_id()].gc_ignored++; goto out; + } /* Calculate number of entries, which we want to expire now. */ goal = atomic_read(&ipv4_dst_ops.entries) - @@ -567,6 +578,8 @@ static int rt_garbage_collect(void) We will not spin here for long time in any case. */ + rt_cache_stat[smp_processor_id()].gc_goal_miss++; + if (expire == 0) break; @@ -584,6 +597,7 @@ static int rt_garbage_collect(void) goto out; if (net_ratelimit()) printk(KERN_WARNING "dst cache overflow\n"); + rt_cache_stat[smp_processor_id()].gc_dst_overflow++; return 1; work_done: |