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| author |   Eric Dumazet <edumazet@google.com> | 2012-12-28 06:06:37 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2012-12-28 15:25:19 -0800 |
| commit | b2111724a639ec31a19fdca62ea3a0a222d59d11 (patch) | |
| tree | 0d707599721ae209b176feab8ce41b7e63191e78 /net/sctp | |
| parent | dummy: implement carrier change (diff) | |
| download | linux-dev-b2111724a639ec31a19fdca62ea3a0a222d59d11.tar.xz linux-dev-b2111724a639ec31a19fdca62ea3a0a222d59d11.zip | |
net: use per task frag allocator in skb_append_datato_frags
Use the new per task frag allocator in skb_append_datato_frags(),
to reduce number of frags and page allocator overhead.
Tested:
ifconfig lo mtu 16436
perf record netperf -t UDP_STREAM ; perf report
before :
Throughput: 32928 Mbit/s
51.79% netperf [kernel.kallsyms] [k] copy_user_generic_string
5.98% netperf [kernel.kallsyms] [k] __alloc_pages_nodemask
5.58% netperf [kernel.kallsyms] [k] get_page_from_freelist
5.01% netperf [kernel.kallsyms] [k] __rmqueue
3.74% netperf [kernel.kallsyms] [k] skb_append_datato_frags
1.87% netperf [kernel.kallsyms] [k] prep_new_page
1.42% netperf [kernel.kallsyms] [k] next_zones_zonelist
1.28% netperf [kernel.kallsyms] [k] __inc_zone_state
1.26% netperf [kernel.kallsyms] [k] alloc_pages_current
0.78% netperf [kernel.kallsyms] [k] sock_alloc_send_pskb
0.74% netperf [kernel.kallsyms] [k] udp_sendmsg
0.72% netperf [kernel.kallsyms] [k] zone_watermark_ok
0.68% netperf [kernel.kallsyms] [k] __cpuset_node_allowed_softwall
0.67% netperf [kernel.kallsyms] [k] fib_table_lookup
0.60% netperf [kernel.kallsyms] [k] memcpy_fromiovecend
0.55% netperf [kernel.kallsyms] [k] __udp4_lib_lookup
after:
Throughput: 47185 Mbit/s
61.74% netperf [kernel.kallsyms] [k] copy_user_generic_string
2.07% netperf [kernel.kallsyms] [k] prep_new_page
1.98% netperf [kernel.kallsyms] [k] skb_append_datato_frags
1.02% netperf [kernel.kallsyms] [k] sock_alloc_send_pskb
0.97% netperf [kernel.kallsyms] [k] enqueue_task_fair
0.97% netperf [kernel.kallsyms] [k] udp_sendmsg
0.91% netperf [kernel.kallsyms] [k] __ip_route_output_key
0.88% netperf [kernel.kallsyms] [k] __netif_receive_skb
0.87% netperf [kernel.kallsyms] [k] fib_table_lookup
0.85% netperf [kernel.kallsyms] [k] resched_task
0.78% netperf [kernel.kallsyms] [k] __udp4_lib_lookup
0.77% netperf [kernel.kallsyms] [k] _raw_spin_lock_irqsave
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
0 files changed, 0 insertions, 0 deletions