From: Thomas Graf <tgraf@infradead.org>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
David Miller <davem@davemloft.net>,
rick.jones2@hp.com, therbert@google.com, wsommerfeld@google.com,
daniel.baluta@gmail.com, netdev@vger.kernel.org
Subject: Re: SO_REUSEPORT - can it be done in kernel?
Date: Tue, 1 Mar 2011 06:27:59 -0500 [thread overview]
Message-ID: <20110301112759.GK9763@canuck.infradead.org> (raw)
In-Reply-To: <1298977984.3284.15.camel@edumazet-laptop>
On Tue, Mar 01, 2011 at 12:13:04PM +0100, Eric Dumazet wrote:
> Its a bit strange two cpus spend time in softirq, unless you have two
> queryperf sources, and a multiqueue NIC, or maybe you use two NICS ?
one NIC, 2 clients (12 instances per client)
[root@hp-bl460cg7-01 ~]# cat /sys/class/net/eth0/queues/rx-0/rps_cpus
00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000
[root@hp-bl460cg7-01 ~]# netstat -s | grep err
1781377 packet receive errors
> Mind use "perf top -C 1" and "perf top -C 11" to check what these cpus
> do ?
--------------------------------------------------------------------------------------------------------------------
PerfTop: 16198 irqs/sec kernel:99.1% exact: 0.0% [1000Hz cpu-clock-msecs], (all, CPU: 1)
--------------------------------------------------------------------------------------------------------------------
samples pcnt function DSO
_______ _____ ___________________________ ___________________________________________________________
51675.00 33.2% _raw_spin_unlock_irqrestore [kernel.kallsyms]
12426.00 8.0% clflush_cache_range [kernel.kallsyms]
5511.00 3.5% be_poll_rx /lib/modules/2.6.38-rc5+/kernel/drivers/net/benet/be2net.ko
4567.00 2.9% __udp4_lib_lookup [kernel.kallsyms]
3981.00 2.6% __kmalloc_node_track_caller [kernel.kallsyms]
3975.00 2.6% get_rx_page_info /lib/modules/2.6.38-rc5+/kernel/drivers/net/benet/be2net.ko
3725.00 2.4% sk_run_filter [kernel.kallsyms]
3606.00 2.3% get_page_from_freelist [kernel.kallsyms]
3178.00 2.0% __domain_mapping [kernel.kallsyms]
3122.00 2.0% kmem_cache_alloc_node [kernel.kallsyms]
2839.00 1.8% sock_queue_rcv_skb [kernel.kallsyms]
2246.00 1.4% __netif_receive_skb [kernel.kallsyms]
2245.00 1.4% nf_iterate [kernel.kallsyms]
2081.00 1.3% __udp4_lib_rcv [kernel.kallsyms]
2042.00 1.3% ipt_do_table [kernel.kallsyms]
1901.00 1.2% _raw_spin_lock [kernel.kallsyms]
1856.00 1.2% __alloc_skb [kernel.kallsyms]
1645.00 1.1% read_tsc [kernel.kallsyms]
1562.00 1.0% nf_ct_tuple_equal [kernel.kallsyms]
1562.00 1.0% ip_rcv [kernel.kallsyms]
1495.00 1.0% __nf_conntrack_find_get [kernel.kallsyms]
1477.00 0.9% sock_def_readable [kernel.kallsyms]
1363.00 0.9% find_first_bit [kernel.kallsyms]
1360.00 0.9% domain_get_iommu [kernel.kallsyms]
1255.00 0.8% udp_queue_rcv_skb [kernel.kallsyms]
1174.00 0.8% xfrm4_policy_check.clone.0 [kernel.kallsyms]
1138.00 0.7% hash_conntrack_raw [kernel.kallsyms]
1000.00 0.6% intel_unmap_page [kernel.kallsyms]
959.00 0.6% load_pointer [kernel.kallsyms]
957.00 0.6% sock_flag [kernel.kallsyms]
938.00 0.6% nf_conntrack_in [kernel.kallsyms]
891.00 0.6% _local_bh_enable_ip [kernel.kallsyms]
884.00 0.6% eth_type_trans [kernel.kallsyms]
832.00 0.5% be_post_rx_frags /lib/modules/2.6.38-rc5+/kernel/drivers/net/benet/be2net.ko
829.00 0.5% __alloc_pages_nodemask [kernel.kallsyms]
813.00 0.5% kmem_cache_alloc [kernel.kallsyms]
802.00 0.5% netif_receive_skb [kernel.kallsyms]
802.00 0.5% ip_route_input_common [kernel.kallsyms]
723.00 0.5% nf_ct_get_tuple [kernel.kallsyms]
720.00 0.5% __intel_map_single [kernel.kallsyms]
720.00 0.5% udp_error [kernel.kallsyms]
--------------------------------------------------------------------------------------------------------------------
PerfTop: 16360 irqs/sec kernel:72.6% exact: 0.0% [1000Hz cpu-clock-msecs], (all, CPU: 11)
--------------------------------------------------------------------------------------------------------------------
samples pcnt function DSO
_______ _____ _____________________________ ___________________________________________________________
16993.00 32.4% _raw_spin_unlock_irqrestore [kernel.kallsyms]
5833.00 11.1% clflush_cache_range [kernel.kallsyms]
3315.00 6.3% be_tx_compl_process /lib/modules/2.6.38-rc5+/kernel/drivers/net/benet/be2net.ko
1818.00 3.5% kmem_cache_free [kernel.kallsyms]
1415.00 2.7% isc_rwlock_lock /usr/lib64/libisc.so.62.0.1
1090.00 2.1% be_poll_tx_mcc /lib/modules/2.6.38-rc5+/kernel/drivers/net/benet/be2net.ko
811.00 1.5% skb_release_head_state [kernel.kallsyms]
772.00 1.5% skb_release_data [kernel.kallsyms]
712.00 1.4% dns_rbt_findnode /usr/lib64/libdns.so.69.0.1
703.00 1.3% isc_rwlock_unlock /usr/lib64/libisc.so.62.0.1
695.00 1.3% dma_pte_clear_range [kernel.kallsyms]
618.00 1.2% kfree_skb [kernel.kallsyms]
597.00 1.1% kfree [kernel.kallsyms]
553.00 1.1% intel_unmap_page [kernel.kallsyms]
531.00 1.0% __do_softirq [kernel.kallsyms]
504.00 1.0% isc_stats_increment /usr/lib64/libisc.so.62.0.1
397.00 0.8% virt_to_head_page [kernel.kallsyms]
306.00 0.6% _raw_spin_lock [kernel.kallsyms]
270.00 0.5% domain_get_iommu [kernel.kallsyms]
256.00 0.5% dns_name_fullcompare /usr/lib64/libdns.so.69.0.1
233.00 0.4% find_first_bit [kernel.kallsyms]
222.00 0.4% dns_name_equal /usr/lib64/libdns.so.69.0.1
218.00 0.4% __pthread_mutex_lock_internal /lib64/libpthread-2.12.so
207.00 0.4% dns_rbtnodechain_init /usr/lib64/libdns.so.69.0.1
196.00 0.4% dns_acl_match /usr/lib64/libdns.so.69.0.1
194.00 0.4% dma_pte_free_pagetable [kernel.kallsyms]
192.00 0.4% dns_name_getlabelsequence /usr/lib64/libdns.so.69.0.1
next prev parent reply other threads:[~2011-03-01 11:28 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-27 10:07 SO_REUSEPORT - can it be done in kernel? Daniel Baluta
2011-01-27 15:55 ` Bill Sommerfeld
2011-01-27 21:32 ` Tom Herbert
2011-02-25 12:56 ` Thomas Graf
2011-02-25 19:18 ` Rick Jones
2011-02-25 19:20 ` David Miller
2011-02-26 0:57 ` Herbert Xu
2011-02-26 2:12 ` David Miller
2011-02-26 2:48 ` Herbert Xu
2011-02-26 3:07 ` David Miller
2011-02-26 3:11 ` Herbert Xu
2011-02-26 7:31 ` Eric Dumazet
2011-02-26 7:46 ` David Miller
2011-02-27 11:02 ` Thomas Graf
2011-02-27 11:06 ` Herbert Xu
2011-02-28 3:45 ` Tom Herbert
2011-02-28 4:26 ` Herbert Xu
2011-02-28 11:36 ` Herbert Xu
2011-02-28 13:32 ` Eric Dumazet
2011-02-28 14:13 ` Herbert Xu
2011-02-28 14:22 ` Eric Dumazet
2011-02-28 14:25 ` Herbert Xu
2011-02-28 14:53 ` Eric Dumazet
2011-02-28 15:01 ` Thomas Graf
2011-02-28 14:13 ` Thomas Graf
2011-02-28 16:22 ` Eric Dumazet
2011-02-28 16:37 ` Thomas Graf
2011-02-28 17:07 ` Eric Dumazet
2011-03-01 10:19 ` Thomas Graf
2011-03-01 10:33 ` Eric Dumazet
2011-03-01 11:07 ` Thomas Graf
2011-03-01 11:13 ` Eric Dumazet
2011-03-01 11:27 ` Thomas Graf [this message]
2011-03-01 11:45 ` Eric Dumazet
2011-03-01 11:53 ` Herbert Xu
2011-03-01 12:32 ` Herbert Xu
2011-03-01 13:04 ` Eric Dumazet
2011-03-01 13:11 ` Herbert Xu
2011-03-01 13:03 ` Eric Dumazet
2011-03-01 13:18 ` Herbert Xu
2011-03-01 13:52 ` Eric Dumazet
2011-03-01 13:58 ` Herbert Xu
2011-03-01 16:31 ` Eric Dumazet
2011-03-02 0:23 ` Herbert Xu
2011-03-02 2:00 ` Eric Dumazet
2011-03-02 2:39 ` Herbert Xu
2011-03-02 2:56 ` Eric Dumazet
2011-03-02 3:09 ` Herbert Xu
2011-03-02 3:44 ` Eric Dumazet
2011-03-02 7:12 ` Tom Herbert
2011-03-02 7:31 ` Herbert Xu
2011-03-02 8:04 ` Eric Dumazet
2011-03-02 8:07 ` Herbert Xu
2011-03-02 8:24 ` Eric Dumazet
2011-03-01 12:01 ` Thomas Graf
2011-03-01 12:15 ` Herbert Xu
2011-03-01 13:27 ` Herbert Xu
2011-03-01 12:18 ` Thomas Graf
2011-03-01 12:19 ` Herbert Xu
2011-03-01 13:50 ` Thomas Graf
2011-03-01 14:06 ` Eric Dumazet
2011-03-01 14:22 ` Thomas Graf
2011-03-01 14:30 ` Thomas Graf
2011-03-01 14:52 ` Eric Dumazet
2011-03-01 15:07 ` Thomas Graf
2011-03-01 5:33 ` Eric Dumazet
2011-03-01 12:35 ` Herbert Xu
2011-03-01 12:36 ` [PATCH 2/5] inet: Remove explicit write references to sk/inet in ip_append_data Herbert Xu
2011-03-02 6:15 ` inet: Replace left-over references to inet->cork Herbert Xu
2011-03-02 7:01 ` David Miller
2011-03-01 12:36 ` [PATCH 1/5] inet: Remove unused sk_sndmsg_* from UFO Herbert Xu
2011-03-01 12:36 ` [PATCH 3/5] inet: Add ip_make_skb and ip_finish_skb Herbert Xu
2011-03-01 12:36 ` [PATCH 4/5] udp: Switch to ip_finish_skb Herbert Xu
2011-03-01 12:36 ` [PATCH 5/5] udp: Add lockless transmit path Herbert Xu
2011-03-01 16:43 ` SO_REUSEPORT - can it be done in kernel? Eric Dumazet
2011-03-01 20:36 ` David Miller
2011-02-28 11:41 ` [PATCH 2/5] net: Remove explicit write references to sk/inet in ip_append_data Herbert Xu
2011-03-01 5:31 ` Eric Dumazet
2011-02-28 11:41 ` [PATCH 1/5] net: Remove unused sk_sndmsg_* from UFO Herbert Xu
2011-03-01 5:31 ` Eric Dumazet
2011-02-28 11:41 ` [PATCH 4/5] udp: Add lockless transmit path Herbert Xu
2011-02-28 11:41 ` Herbert Xu
2011-03-01 5:30 ` Eric Dumazet
2011-02-28 11:41 ` [PATCH 3/5] inet: Add ip_make_skb and ip_send_skb Herbert Xu
2011-03-01 5:31 ` Eric Dumazet
2011-02-25 19:21 ` SO_REUSEPORT - can it be done in kernel? Eric Dumazet
2011-02-25 22:48 ` Thomas Graf
2011-02-25 23:15 ` Rick Jones
2011-02-25 19:51 ` Tom Herbert
2011-02-25 22:58 ` Thomas Graf
2011-02-25 23:33 ` Bill Sommerfeld
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20110301112759.GK9763@canuck.infradead.org \
--to=tgraf@infradead.org \
--cc=daniel.baluta@gmail.com \
--cc=davem@davemloft.net \
--cc=eric.dumazet@gmail.com \
--cc=herbert@gondor.apana.org.au \
--cc=netdev@vger.kernel.org \
--cc=rick.jones2@hp.com \
--cc=therbert@google.com \
--cc=wsommerfeld@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).