From: Ingo Molnar <mingo@elte.hu>
To: Michael Buesch <mb@bu3sch.de>
Cc: Con Kolivas <kernel@kolivas.org>,
linux-kernel@vger.kernel.org,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Mike Galbraith <efault@gmx.de>, Felix Fietkau <nbd@openwrt.org>
Subject: Re: BFS vs. mainline scheduler benchmarks and measurements
Date: Mon, 7 Sep 2009 20:26:29 +0200 [thread overview]
Message-ID: <20090907182629.GA3484@elte.hu> (raw)
In-Reply-To: <200909071716.57722.mb@bu3sch.de>
* Michael Buesch <mb@bu3sch.de> wrote:
> Here's a very simple test setup on an embedded singlecore bcm47xx
> machine (WL500GPv2) It uses iperf for performance testing. The
> iperf server is run on the embedded device. The device is so slow
> that the iperf test is completely CPU bound. The network
> connection is a 100MBit on the device connected via patch cable to
> a 1000MBit machine.
>
> The kernel is openwrt-2.6.30.5.
>
> Here are the results:
>
>
>
> Mainline CFS scheduler:
>
> mb@homer:~$ iperf -c 192.168.1.1
> ------------------------------------------------------------
> Client connecting to 192.168.1.1, TCP port 5001
> TCP window size: 16.0 KByte (default)
> ------------------------------------------------------------
> [ 3] local 192.168.1.99 port 35793 connected with 192.168.1.1 port 5001
> [ ID] Interval Transfer Bandwidth
> [ 3] 0.0-10.0 sec 27.4 MBytes 23.0 Mbits/sec
> mb@homer:~$ iperf -c 192.168.1.1
> ------------------------------------------------------------
> Client connecting to 192.168.1.1, TCP port 5001
> TCP window size: 16.0 KByte (default)
> ------------------------------------------------------------
> [ 3] local 192.168.1.99 port 35794 connected with 192.168.1.1 port 5001
> [ ID] Interval Transfer Bandwidth
> [ 3] 0.0-10.0 sec 27.3 MBytes 22.9 Mbits/sec
> mb@homer:~$ iperf -c 192.168.1.1
> ------------------------------------------------------------
> Client connecting to 192.168.1.1, TCP port 5001
> TCP window size: 16.0 KByte (default)
> ------------------------------------------------------------
> [ 3] local 192.168.1.99 port 56147 connected with 192.168.1.1 port 5001
> [ ID] Interval Transfer Bandwidth
> [ 3] 0.0-10.0 sec 27.3 MBytes 22.9 Mbits/sec
>
>
> BFS scheduler:
>
> mb@homer:~$ iperf -c 192.168.1.1
> ------------------------------------------------------------
> Client connecting to 192.168.1.1, TCP port 5001
> TCP window size: 16.0 KByte (default)
> ------------------------------------------------------------
> [ 3] local 192.168.1.99 port 52489 connected with 192.168.1.1 port 5001
> [ ID] Interval Transfer Bandwidth
> [ 3] 0.0-10.0 sec 38.2 MBytes 32.0 Mbits/sec
> mb@homer:~$ iperf -c 192.168.1.1
> ------------------------------------------------------------
> Client connecting to 192.168.1.1, TCP port 5001
> TCP window size: 16.0 KByte (default)
> ------------------------------------------------------------
> [ 3] local 192.168.1.99 port 52490 connected with 192.168.1.1 port 5001
> [ ID] Interval Transfer Bandwidth
> [ 3] 0.0-10.0 sec 38.1 MBytes 31.9 Mbits/sec
> mb@homer:~$ iperf -c 192.168.1.1
> ------------------------------------------------------------
> Client connecting to 192.168.1.1, TCP port 5001
> TCP window size: 16.0 KByte (default)
> ------------------------------------------------------------
> [ 3] local 192.168.1.99 port 52491 connected with 192.168.1.1 port 5001
> [ ID] Interval Transfer Bandwidth
> [ 3] 0.0-10.0 sec 38.1 MBytes 31.9 Mbits/sec
That's interesting. I tried to reproduce it on x86, but the profile
does not show any scheduler overhead at all on the server:
$ perf report
#
# Samples: 8369
#
# Overhead Symbol
# ........ ......
#
9.20% [k] copy_user_generic_string
3.80% [k] e1000_clean
3.58% [k] ipt_do_table
2.72% [k] mwait_idle
2.68% [k] nf_iterate
2.28% [k] e1000_intr
2.15% [k] tcp_packet
2.10% [k] __hash_conntrack
1.59% [k] read_tsc
1.52% [k] _local_bh_enable_ip
1.34% [k] eth_type_trans
1.29% [k] __alloc_skb
1.19% [k] tcp_recvmsg
1.19% [k] ip_rcv
1.17% [k] e1000_clean_rx_irq
1.12% [k] apic_timer_interrupt
0.99% [k] vsnprintf
0.96% [k] nf_conntrack_in
0.96% [k] kmem_cache_free
0.93% [k] __kmalloc_track_caller
Could you profile it please? Also, what's the context-switch rate?
Below is the call-graph profile as well - all the overhead is in
networking and SLAB.
Ingo
$ perf report --call-graph fractal,5
#
# Samples: 8947
#
# Overhead Command Shared Object Symbol
# ........ .............. ............................. ......
#
9.06% iperf [kernel] [k] copy_user_generic_string
|
|--98.89%-- skb_copy_datagram_iovec
| |
| |--77.18%-- tcp_recvmsg
| | sock_common_recvmsg
| | __sock_recvmsg
| | sock_recvmsg
| | sys_recvfrom
| | system_call_fastpath
| | __recv
| |
| --22.82%-- tcp_rcv_established
| tcp_v4_do_rcv
| tcp_prequeue_process
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
--1.11%-- system_call_fastpath
__GI___libc_nanosleep
3.62% [init] [kernel] [k] e1000_clean
2.96% [init] [kernel] [k] ipt_do_table
2.79% [init] [kernel] [k] mwait_idle
2.22% [init] [kernel] [k] e1000_intr
1.93% [init] [kernel] [k] nf_iterate
1.65% [init] [kernel] [k] __hash_conntrack
1.52% [init] [kernel] [k] tcp_packet
1.29% [init] [kernel] [k] ip_rcv
1.18% [init] [kernel] [k] __alloc_skb
1.15% iperf [kernel] [k] tcp_recvmsg
1.04% [init] [kernel] [k] _local_bh_enable_ip
1.02% [init] [kernel] [k] apic_timer_interrupt
1.02% [init] [kernel] [k] eth_type_trans
1.01% [init] [kernel] [k] tcp_v4_rcv
0.96% iperf [kernel] [k] kfree
|
|--95.35%-- skb_release_data
| __kfree_skb
| |
| |--79.27%-- tcp_recvmsg
| | sock_common_recvmsg
| | __sock_recvmsg
| | sock_recvmsg
| | sys_recvfrom
| | system_call_fastpath
| | __recv
| |
| --20.73%-- tcp_rcv_established
| tcp_v4_do_rcv
| tcp_prequeue_process
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
--4.65%-- __kfree_skb
|
|--75.00%-- tcp_rcv_established
| tcp_v4_do_rcv
| tcp_prequeue_process
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
--25.00%-- tcp_recvmsg
sock_common_recvmsg
__sock_recvmsg
sock_recvmsg
sys_recvfrom
system_call_fastpath
__recv
0.96% [init] [kernel] [k] read_tsc
0.92% iperf [kernel] [k] tcp_v4_do_rcv
|
|--95.12%-- tcp_prequeue_process
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
--4.88%-- tcp_recvmsg
sock_common_recvmsg
__sock_recvmsg
sock_recvmsg
sys_recvfrom
system_call_fastpath
__recv
0.92% [init] [kernel] [k] e1000_clean_rx_irq
0.86% iperf [kernel] [k] tcp_rcv_established
|
|--96.10%-- tcp_v4_do_rcv
| tcp_prequeue_process
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
--3.90%-- tcp_prequeue_process
tcp_recvmsg
sock_common_recvmsg
__sock_recvmsg
sock_recvmsg
sys_recvfrom
system_call_fastpath
__recv
0.84% iperf [kernel] [k] kmem_cache_free
|
|--93.33%-- __kfree_skb
| |
| |--71.43%-- tcp_recvmsg
| | sock_common_recvmsg
| | __sock_recvmsg
| | sock_recvmsg
| | sys_recvfrom
| | system_call_fastpath
| | __recv
| |
| --28.57%-- tcp_rcv_established
| tcp_v4_do_rcv
| tcp_prequeue_process
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
|--4.00%-- tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
--2.67%-- tcp_rcv_established
tcp_v4_do_rcv
tcp_prequeue_process
tcp_recvmsg
sock_common_recvmsg
__sock_recvmsg
sock_recvmsg
sys_recvfrom
system_call_fastpath
__recv
0.80% [init] [kernel] [k] netif_receive_skb
0.79% iperf [kernel] [k] tcp_event_data_recv
|
|--83.10%-- tcp_rcv_established
| tcp_v4_do_rcv
| tcp_prequeue_process
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
|--12.68%-- tcp_v4_do_rcv
| tcp_prequeue_process
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
--4.23%-- tcp_data_queue
tcp_rcv_established
tcp_v4_do_rcv
tcp_prequeue_process
tcp_recvmsg
sock_common_recvmsg
__sock_recvmsg
sock_recvmsg
sys_recvfrom
system_call_fastpath
__recv
0.67% perf [kernel] [k] format_decode
|
|--91.67%-- vsnprintf
| seq_printf
| |
| |--67.27%-- show_map_vma
| | show_map
| | seq_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __GI_read
| |
| |--23.64%-- render_sigset_t
| | proc_pid_status
| | proc_single_show
| | seq_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __GI_read
| |
| |--7.27%-- proc_pid_status
| | proc_single_show
| | seq_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __GI_read
| |
| --1.82%-- cpuset_task_status_allowed
| proc_pid_status
| proc_single_show
| seq_read
| vfs_read
| sys_read
| system_call_fastpath
| __GI_read
|
--8.33%-- seq_printf
|
|--60.00%-- proc_pid_status
| proc_single_show
| seq_read
| vfs_read
| sys_read
| system_call_fastpath
| __GI_read
|
--40.00%-- show_map_vma
show_map
seq_read
vfs_read
sys_read
system_call_fastpath
__GI_read
0.65% [init] [kernel] [k] __kmalloc_track_caller
0.63% [init] [kernel] [k] nf_conntrack_in
0.63% [init] [kernel] [k] ip_route_input
0.58% perf [kernel] [k] vsnprintf
|
|--98.08%-- seq_printf
| |
| |--60.78%-- show_map_vma
| | show_map
| | seq_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __GI_read
| |
| |--19.61%-- render_sigset_t
| | proc_pid_status
| | proc_single_show
| | seq_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __GI_read
| |
| |--9.80%-- proc_pid_status
| | proc_single_show
| | seq_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __GI_read
| |
| |--3.92%-- task_mem
| | proc_pid_status
| | proc_single_show
| | seq_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __GI_read
| |
| |--3.92%-- cpuset_task_status_allowed
| | proc_pid_status
| | proc_single_show
| | seq_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __GI_read
| |
| --1.96%-- render_cap_t
| proc_pid_status
| proc_single_show
| seq_read
| vfs_read
| sys_read
| system_call_fastpath
| __GI_read
|
--1.92%-- snprintf
proc_task_readdir
vfs_readdir
sys_getdents
system_call_fastpath
__getdents64
0x69706565000a3430
0.57% [init] [kernel] [k] ktime_get
0.57% [init] [kernel] [k] nf_nat_fn
0.56% iperf [kernel] [k] tcp_packet
|
|--68.00%-- __tcp_ack_snd_check
| tcp_rcv_established
| tcp_v4_do_rcv
| tcp_prequeue_process
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
--32.00%-- tcp_cleanup_rbuf
tcp_recvmsg
sock_common_recvmsg
__sock_recvmsg
sock_recvmsg
sys_recvfrom
system_call_fastpath
__recv
0.56% iperf /usr/bin/iperf [.] 0x000000000059f8
|
|--8.00%-- 0x4059f8
|
|--8.00%-- 0x405a16
|
|--8.00%-- 0x4059fd
|
|--4.00%-- 0x409d22
|
|--4.00%-- 0x405871
|
|--4.00%-- 0x406ee1
|
|--4.00%-- 0x405726
|
|--4.00%-- 0x4058db
|
|--4.00%-- 0x406ee8
|
|--2.00%-- 0x405b60
|
|--2.00%-- 0x4058fd
|
|--2.00%-- 0x4058d5
|
|--2.00%-- 0x405490
|
|--2.00%-- 0x4058bb
|
|--2.00%-- 0x405b93
|
|--2.00%-- 0x405b8e
|
|--2.00%-- 0x405903
|
|--2.00%-- 0x405ba8
|
|--2.00%-- 0x406eae
|
|--2.00%-- 0x405545
|
|--2.00%-- 0x405870
|
|--2.00%-- 0x405b67
|
|--2.00%-- 0x4058ce
|
|--2.00%-- 0x40570e
|
|--2.00%-- 0x406ee4
|
|--2.00%-- 0x405a02
|
|--2.00%-- 0x406eec
|
|--2.00%-- 0x405b82
|
|--2.00%-- 0x40556a
|
|--2.00%-- 0x405755
|
|--2.00%-- 0x405a0a
|
|--2.00%-- 0x405498
|
|--2.00%-- 0x409d20
|
|--2.00%-- 0x405b21
|
--2.00%-- 0x405a2c
0.56% [init] [kernel] [k] kmem_cache_alloc
0.56% [init] [kernel] [k] __inet_lookup_established
0.55% perf [kernel] [k] number
|
|--95.92%-- vsnprintf
| |
| |--97.87%-- seq_printf
| | |
| | |--56.52%-- show_map_vma
| | | show_map
| | | seq_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __GI_read
| | |
| | |--28.26%-- render_sigset_t
| | | proc_pid_status
| | | proc_single_show
| | | seq_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __GI_read
| | |
| | |--6.52%-- proc_pid_status
| | | proc_single_show
| | | seq_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __GI_read
| | |
| | |--4.35%-- render_cap_t
| | | proc_pid_status
| | | proc_single_show
| | | seq_read
| | | vfs_read
| | | sys_read
| | | system_call_fastpath
| | | __GI_read
| | |
| | --4.35%-- task_mem
| | proc_pid_status
| | proc_single_show
| | seq_read
| | vfs_read
| | sys_read
| | system_call_fastpath
| | __GI_read
| |
| --2.13%-- scnprintf
| bitmap_scnlistprintf
| seq_bitmap_list
| cpuset_task_status_allowed
| proc_pid_status
| proc_single_show
| seq_read
| vfs_read
| sys_read
| system_call_fastpath
| __GI_read
|
--4.08%-- seq_printf
|
|--50.00%-- show_map_vma
| show_map
| seq_read
| vfs_read
| sys_read
| system_call_fastpath
| __GI_read
|
--50.00%-- render_sigset_t
proc_pid_status
proc_single_show
seq_read
vfs_read
sys_read
system_call_fastpath
__GI_read
0.55% [init] [kernel] [k] native_sched_clock
0.50% iperf [kernel] [k] e1000_xmit_frame
|
|--71.11%-- __tcp_ack_snd_check
| tcp_rcv_established
| tcp_v4_do_rcv
| tcp_prequeue_process
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
--28.89%-- tcp_cleanup_rbuf
tcp_recvmsg
sock_common_recvmsg
__sock_recvmsg
sock_recvmsg
sys_recvfrom
system_call_fastpath
__recv
0.50% iperf [kernel] [k] ipt_do_table
|
|--37.78%-- ipt_local_hook
| nf_iterate
| nf_hook_slow
| __ip_local_out
| ip_local_out
| ip_queue_xmit
| tcp_transmit_skb
| tcp_send_ack
| |
| |--58.82%-- __tcp_ack_snd_check
| | tcp_rcv_established
| | tcp_v4_do_rcv
| | tcp_prequeue_process
| | tcp_recvmsg
| | sock_common_recvmsg
| | __sock_recvmsg
| | sock_recvmsg
| | sys_recvfrom
| | system_call_fastpath
| | __recv
| |
| --41.18%-- tcp_cleanup_rbuf
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
|--31.11%-- ipt_post_routing_hook
| nf_iterate
| nf_hook_slow
| ip_output
| ip_local_out
| ip_queue_xmit
| tcp_transmit_skb
| tcp_send_ack
| |
| |--64.29%-- __tcp_ack_snd_check
| | tcp_rcv_established
| | tcp_v4_do_rcv
| | tcp_prequeue_process
| | tcp_recvmsg
| | sock_common_recvmsg
| | __sock_recvmsg
| | sock_recvmsg
| | sys_recvfrom
| | system_call_fastpath
| | __recv
| |
| --35.71%-- tcp_cleanup_rbuf
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
|--20.00%-- ipt_local_out_hook
| nf_iterate
| nf_hook_slow
| __ip_local_out
| ip_local_out
| ip_queue_xmit
| tcp_transmit_skb
| tcp_send_ack
| |
| |--88.89%-- __tcp_ack_snd_check
| | tcp_rcv_established
| | tcp_v4_do_rcv
| | tcp_prequeue_process
| | tcp_recvmsg
| | sock_common_recvmsg
| | __sock_recvmsg
| | sock_recvmsg
| | sys_recvfrom
| | system_call_fastpath
| | __recv
| |
| --11.11%-- tcp_cleanup_rbuf
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
|--6.67%-- nf_iterate
| nf_hook_slow
| |
| |--66.67%-- ip_output
| | ip_local_out
| | ip_queue_xmit
| | tcp_transmit_skb
| | tcp_send_ack
| | tcp_cleanup_rbuf
| | tcp_recvmsg
| | sock_common_recvmsg
| | __sock_recvmsg
| | sock_recvmsg
| | sys_recvfrom
| | system_call_fastpath
| | __recv
| |
| --33.33%-- __ip_local_out
| ip_local_out
| ip_queue_xmit
| tcp_transmit_skb
| tcp_send_ack
| __tcp_ack_snd_check
| tcp_rcv_established
| tcp_v4_do_rcv
| tcp_prequeue_process
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
|--2.22%-- ipt_local_in_hook
| nf_iterate
| nf_hook_slow
| ip_local_deliver
| ip_rcv_finish
| ip_rcv
| netif_receive_skb
| napi_skb_finish
| napi_gro_receive
| e1000_receive_skb
| e1000_clean_rx_irq
| e1000_clean
| net_rx_action
| __do_softirq
| call_softirq
| do_softirq
| irq_exit
| do_IRQ
| ret_from_intr
| vgettimeofday
|
--2.22%-- ipt_pre_routing_hook
nf_iterate
nf_hook_slow
ip_rcv
netif_receive_skb
napi_skb_finish
napi_gro_receive
e1000_receive_skb
e1000_clean_rx_irq
e1000_clean
net_rx_action
__do_softirq
call_softirq
do_softirq
irq_exit
do_IRQ
ret_from_intr
__GI___libc_nanosleep
0.50% iperf [kernel] [k] schedule
|
|--57.78%-- do_nanosleep
| hrtimer_nanosleep
| sys_nanosleep
| system_call_fastpath
| __GI___libc_nanosleep
|
|--33.33%-- schedule_timeout
| sk_wait_data
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
|--6.67%-- hrtimer_nanosleep
| sys_nanosleep
| system_call_fastpath
| __GI___libc_nanosleep
|
--2.22%-- sk_wait_data
tcp_recvmsg
sock_common_recvmsg
__sock_recvmsg
sock_recvmsg
sys_recvfrom
system_call_fastpath
__recv
0.49% iperf [kernel] [k] tcp_transmit_skb
|
|--97.73%-- tcp_send_ack
| |
| |--83.72%-- __tcp_ack_snd_check
| | tcp_rcv_established
| | tcp_v4_do_rcv
| | |
| | |--97.22%-- tcp_prequeue_process
| | | tcp_recvmsg
| | | sock_common_recvmsg
| | | __sock_recvmsg
| | | sock_recvmsg
| | | sys_recvfrom
| | | system_call_fastpath
| | | __recv
| | |
| | --2.78%-- release_sock
| | tcp_recvmsg
| | sock_common_recvmsg
| | __sock_recvmsg
| | sock_recvmsg
| | sys_recvfrom
| | system_call_fastpath
| | __recv
| |
| --16.28%-- tcp_cleanup_rbuf
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
--2.27%-- __tcp_ack_snd_check
tcp_rcv_established
tcp_v4_do_rcv
tcp_prequeue_process
tcp_recvmsg
sock_common_recvmsg
__sock_recvmsg
sock_recvmsg
sys_recvfrom
system_call_fastpath
__recv
0.49% [init] [kernel] [k] nf_hook_slow
0.48% iperf [kernel] [k] virt_to_head_page
|
|--53.49%-- kfree
| skb_release_data
| __kfree_skb
| |
| |--65.22%-- tcp_recvmsg
| | sock_common_recvmsg
| | __sock_recvmsg
| | sock_recvmsg
| | sys_recvfrom
| | system_call_fastpath
| | __recv
| |
| --34.78%-- tcp_rcv_established
| tcp_v4_do_rcv
| tcp_prequeue_process
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
|--18.60%-- skb_release_data
| __kfree_skb
| |
| |--62.50%-- tcp_rcv_established
| | tcp_v4_do_rcv
| | tcp_prequeue_process
| | tcp_recvmsg
| | sock_common_recvmsg
| | __sock_recvmsg
| | sock_recvmsg
| | sys_recvfrom
| | system_call_fastpath
| | __recv
| |
| --37.50%-- tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
|--18.60%-- kmem_cache_free
| __kfree_skb
| |
| |--62.50%-- tcp_rcv_established
| | tcp_v4_do_rcv
| | tcp_prequeue_process
| | tcp_recvmsg
| | sock_common_recvmsg
| | __sock_recvmsg
| | sock_recvmsg
| | sys_recvfrom
| | system_call_fastpath
| | __recv
| |
| --37.50%-- tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
--9.30%-- __kfree_skb
|
|--75.00%-- tcp_rcv_established
| tcp_v4_do_rcv
| tcp_prequeue_process
| tcp_recvmsg
| sock_common_recvmsg
| __sock_recvmsg
| sock_recvmsg
| sys_recvfrom
| system_call_fastpath
| __recv
|
--25.00%-- tcp_recvmsg
sock_common_recvmsg
__sock_recvmsg
sock_recvmsg
sys_recvfrom
system_call_fastpath
__recv
...
next prev parent reply other threads:[~2009-09-07 18:26 UTC|newest]
Thread overview: 224+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-06 20:59 BFS vs. mainline scheduler benchmarks and measurements Ingo Molnar
2009-09-07 2:05 ` Frans Pop
2009-09-07 12:16 ` [quad core results] " Ingo Molnar
2009-09-07 12:36 ` Stefan Richter
2009-09-07 13:41 ` Markus Tornqvist
2009-09-07 13:59 ` Ingo Molnar
2009-09-09 5:54 ` Markus Tornqvist
2009-09-07 14:45 ` Arjan van de Ven
2009-09-07 15:20 ` Frans Pop
2009-09-07 15:36 ` Arjan van de Ven
2009-09-07 15:47 ` Frans Pop
2009-09-07 15:24 ` Xavier Bestel
2009-09-07 15:37 ` Arjan van de Ven
2009-09-07 16:00 ` Diego Calleja
2009-09-07 15:34 ` Nikos Chantziaras
2009-09-07 3:38 ` Nikos Chantziaras
2009-09-07 11:01 ` Frederic Weisbecker
2009-09-08 18:15 ` Nikos Chantziaras
2009-09-10 20:25 ` Frederic Weisbecker
2009-09-07 14:40 ` Arjan van de Ven
2009-09-08 7:19 ` Nikos Chantziaras
2009-09-08 8:31 ` Arjan van de Ven
2009-09-08 20:22 ` Frans Pop
2009-09-08 21:10 ` Michal Schmidt
2009-09-08 21:11 ` Frans Pop
2009-09-08 21:40 ` GeunSik Lim
2009-09-08 22:36 ` Frans Pop
2009-09-09 9:53 ` Benjamin Herrenschmidt
2009-09-09 11:14 ` David Newall
2009-09-09 11:32 ` Benjamin Herrenschmidt
2009-09-09 11:55 ` Frans Pop
2009-09-11 1:36 ` Benjamin Herrenschmidt
2009-09-16 18:27 ` Frans Pop
2009-09-17 1:29 ` Benjamin Herrenschmidt
2009-10-01 9:36 ` Frans Pop
2009-09-08 8:38 ` Arjan van de Ven
2009-09-08 10:13 ` Nikos Chantziaras
2009-09-08 11:32 ` Juergen Beisert
2009-09-08 22:00 ` Nikos Chantziaras
2009-09-08 23:20 ` Jiri Kosina
2009-09-08 23:38 ` Nikos Chantziaras
2009-09-08 12:03 ` Theodore Tso
2009-09-08 21:28 ` Nikos Chantziaras
2009-09-08 14:20 ` Arjan van de Ven
2009-09-08 22:53 ` Nikos Chantziaras
2009-09-07 23:54 ` Thomas Fjellstrom
2009-09-08 11:30 ` Nikos Chantziaras
2009-09-07 3:50 ` Con Kolivas
2009-09-07 18:20 ` Jerome Glisse
2009-09-07 9:49 ` Jens Axboe
2009-09-07 10:12 ` Nikos Chantziaras
2009-09-07 10:41 ` Jens Axboe
2009-09-07 11:57 ` Jens Axboe
2009-09-07 14:14 ` Ingo Molnar
2009-09-07 17:38 ` Jens Axboe
2009-09-07 20:44 ` Jens Axboe
2009-09-08 9:13 ` Jens Axboe
2009-09-08 15:23 ` Peter Zijlstra
2009-09-08 20:34 ` Jens Axboe
2009-09-09 6:13 ` Ingo Molnar
2009-09-09 8:34 ` Nikos Chantziaras
2009-09-09 8:52 ` Mike Galbraith
2009-09-09 9:02 ` Peter Zijlstra
2009-09-09 9:18 ` Mike Galbraith
2009-09-09 9:05 ` Nikos Chantziaras
2009-09-09 9:17 ` Peter Zijlstra
2009-09-09 9:40 ` Nikos Chantziaras
2009-09-09 10:17 ` Nikos Chantziaras
2009-09-10 19:45 ` Martin Steigerwald
2009-09-10 20:06 ` Ingo Molnar
2009-09-10 20:39 ` Martin Steigerwald
2009-09-10 20:42 ` Ingo Molnar
2009-09-10 21:19 ` Martin Steigerwald
2009-09-11 9:26 ` Mat
2009-09-12 11:26 ` Martin Steigerwald
2009-09-09 9:10 ` Jens Axboe
2009-09-09 11:54 ` Jens Axboe
2009-09-09 12:20 ` Jens Axboe
2009-09-09 18:04 ` Ingo Molnar
2009-09-09 20:12 ` Nikos Chantziaras
2009-09-09 20:50 ` Jens Axboe
2009-09-10 1:02 ` Con Kolivas
2009-09-10 11:03 ` Jens Axboe
2009-09-10 3:15 ` Mike Galbraith
2009-09-10 6:08 ` Ingo Molnar
2009-09-10 6:40 ` Ingo Molnar
2009-09-10 9:54 ` Jens Axboe
2009-09-10 10:03 ` Ingo Molnar
2009-09-10 10:11 ` Jens Axboe
2009-09-10 10:28 ` Jens Axboe
2009-09-10 10:57 ` Mike Galbraith
2009-09-10 11:09 ` Jens Axboe
2009-09-10 11:21 ` Mike Galbraith
2009-09-10 11:24 ` Jens Axboe
2009-09-10 11:28 ` Mike Galbraith
2009-09-10 11:35 ` Jens Axboe
2009-09-10 11:42 ` Mike Galbraith
2009-09-10 16:02 ` Bret Towe
2009-09-10 16:05 ` Peter Zijlstra
2009-09-10 16:12 ` Bret Towe
2009-09-10 16:26 ` Ingo Molnar
2009-09-10 16:33 ` Bret Towe
2009-09-10 17:03 ` Ingo Molnar
2009-09-10 17:53 ` Nikos Chantziaras
2009-09-10 18:46 ` Ingo Molnar
2009-09-10 18:51 ` [tip:sched/core] sched: Disable NEW_FAIR_SLEEPERS for now tip-bot for Ingo Molnar
2009-09-10 18:57 ` [tip:sched/core] sched: Fix sched::sched_stat_wait tracepoint field tip-bot for Ingo Molnar
2009-09-10 9:48 ` BFS vs. mainline scheduler benchmarks and measurements Jens Axboe
2009-09-10 9:59 ` Ingo Molnar
2009-09-10 10:01 ` Jens Axboe
2009-09-10 6:55 ` Peter Zijlstra
2009-09-10 6:58 ` Jens Axboe
2009-09-10 7:04 ` Ingo Molnar
2009-09-10 9:44 ` Jens Axboe
2009-09-10 9:45 ` Jens Axboe
2009-09-10 13:53 ` Steven Rostedt
2009-09-10 7:33 ` Jens Axboe
2009-09-10 7:49 ` Ingo Molnar
2009-09-10 7:53 ` Jens Axboe
2009-09-10 10:02 ` Ingo Molnar
2009-09-10 10:09 ` Jens Axboe
2009-09-10 18:00 ` [crash, bisected] Re: clocksource: Resolve cpu hotplug dead lock with TSC unstable Ingo Molnar
2009-09-11 7:37 ` Ingo Molnar
2009-09-11 7:48 ` Martin Schwidefsky
2009-09-11 13:33 ` Martin Schwidefsky
2009-09-11 18:22 ` [tip:timers/core] clocksource: Resolve cpu hotplug dead lock with TSC unstable, fix crash tip-bot for Martin Schwidefsky
2009-09-14 15:19 ` [crash, bisected] Re: clocksource: Resolve cpu hotplug dead lock with TSC unstable Ingo Molnar
2009-09-14 15:37 ` Martin Schwidefsky
2009-09-14 17:59 ` Martin Schwidefsky
2009-09-10 6:59 ` BFS vs. mainline scheduler benchmarks and measurements Ingo Molnar
2009-09-09 12:48 ` Mike Galbraith
2009-09-09 15:37 ` [tip:sched/core] sched: Turn off child_runs_first tip-bot for Mike Galbraith
2009-09-09 17:57 ` Theodore Tso
2009-09-09 18:08 ` Ingo Molnar
2009-09-09 18:59 ` Chris Friesen
2009-09-09 19:48 ` Pavel Machek
2009-09-09 15:37 ` [tip:sched/core] sched: Re-tune the scheduler latency defaults to decrease worst-case latencies tip-bot for Mike Galbraith
2009-09-12 11:45 ` Martin Steigerwald
2009-09-09 15:37 ` [tip:sched/core] sched: Keep kthreads at default priority tip-bot for Mike Galbraith
2009-09-09 16:55 ` Dmitry Torokhov
2009-09-09 17:06 ` Peter Zijlstra
2009-09-09 17:34 ` Mike Galbraith
2009-09-12 11:48 ` Martin Steigerwald
2009-09-12 12:19 ` Mike Galbraith
2009-09-09 11:52 ` BFS vs. mainline scheduler benchmarks and measurements Nikos Chantziaras
2009-09-07 18:02 ` Avi Kivity
2009-09-07 18:46 ` Jens Axboe
2009-09-07 20:36 ` Ingo Molnar
2009-09-07 20:46 ` Jens Axboe
2009-09-07 21:03 ` Peter Zijlstra
2009-09-07 21:05 ` Jens Axboe
2009-09-07 22:18 ` Ingo Molnar
2009-09-09 7:38 ` Pavel Machek
2009-09-10 12:19 ` latt location (Was Re: BFS vs. mainline scheduler benchmarks and measurements) Jens Axboe
2009-09-07 15:16 ` BFS vs. mainline scheduler benchmarks and measurements Michael Buesch
2009-09-07 18:26 ` Ingo Molnar [this message]
2009-09-07 18:47 ` Daniel Walker
2009-09-07 18:51 ` Michael Buesch
2009-09-07 20:57 ` Ingo Molnar
2009-09-07 23:24 ` Pekka Pietikainen
2009-09-08 8:04 ` Ingo Molnar
2009-09-08 8:13 ` Nikos Chantziaras
2009-09-08 10:12 ` Ingo Molnar
2009-09-08 10:40 ` Nikos Chantziaras
2009-09-08 11:35 ` Ingo Molnar
2009-09-08 19:06 ` Nikos Chantziaras
2009-09-08 12:00 ` el_es
2009-09-08 15:45 ` Michael Buesch
2009-09-08 7:48 ` Ingo Molnar
2009-09-08 9:50 ` Benjamin Herrenschmidt
2009-09-08 13:09 ` Ralf Baechle
2009-09-09 1:36 ` Felix Fietkau
2009-09-08 13:09 ` Felix Fietkau
2009-09-09 0:28 ` Benjamin Herrenschmidt
2009-09-09 0:37 ` David Miller
2009-09-08 14:45 ` Michael Buesch
2009-09-18 11:24 ` Ingo Molnar
2009-09-18 14:46 ` Felix Fietkau
2009-09-19 18:01 ` Ingo Molnar
2009-09-19 18:43 ` Felix Fietkau
2009-09-19 19:39 ` Ingo Molnar
2009-09-19 20:15 ` Felix Fietkau
2009-09-19 20:22 ` Ingo Molnar
2009-09-19 20:33 ` Felix Fietkau
2009-09-20 18:10 ` Ingo Molnar
2009-09-08 12:57 ` Epic regression in throughput since v2.6.23 Serge Belyshev
2009-09-08 17:47 ` Jesse Brandeburg
2009-09-08 18:20 ` Nikos Chantziaras
2009-09-08 19:00 ` Jeff Garzik
2009-09-08 19:20 ` Serge Belyshev
2009-09-08 19:26 ` Jeff Garzik
2009-09-08 18:37 ` Nikos Chantziaras
2009-09-08 22:15 ` Serge Belyshev
2009-09-09 15:52 ` Ingo Molnar
2009-09-09 20:49 ` Serge Belyshev
2009-09-09 21:23 ` Cory Fields
2009-09-10 6:53 ` Ingo Molnar
2009-09-10 23:23 ` Serge Belyshev
2009-09-11 6:10 ` Ingo Molnar
2009-09-11 8:55 ` Serge Belyshev
2009-09-13 15:27 ` Serge Belyshev
2009-09-13 15:47 ` Ingo Molnar
2009-09-13 19:17 ` Mike Galbraith
2009-09-14 6:15 ` Mike Galbraith
2009-09-16 19:45 ` Ingo Molnar
2009-09-16 23:18 ` Serge Belyshev
2009-09-17 4:55 ` [patchlet] " Mike Galbraith
2009-09-17 5:06 ` Mike Galbraith
2009-09-17 7:21 ` Ingo Molnar
2009-09-10 7:43 ` [updated] BFS vs. mainline scheduler benchmarks and measurements Ingo Molnar
2009-09-14 9:46 ` Phoronix CFS vs BFS bencharks Nikos Chantziaras
2009-09-14 11:35 ` Mike Galbraith
[not found] ` <f42384a10909140727k463ff460q3859892dcb79bcc5@mail.gmail.com>
2009-09-14 15:32 ` Mike Galbraith
2009-09-14 19:14 ` Marcin Letyns
2009-09-14 20:49 ` Willy Tarreau
2009-09-15 8:37 ` Mike Galbraith
-- strict thread matches above, loose matches on Subject: below --
2009-09-10 21:17 BFS vs. mainline scheduler benchmarks and measurements Martin Steigerwald
2009-09-11 10:10 Mat
2009-09-11 18:33 Volker Armin Hemmann
2009-09-12 7:37 ` Nikos Chantziaras
2009-09-12 7:51 ` Arjan van de Ven
2009-09-12 8:27 ` Volker Armin Hemmann
2009-09-12 9:03 ` Nikos Chantziaras
2009-09-12 9:34 ` Volker Armin Hemmann
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