* [linus:master] [sched/fair] 4f70f106bc: netperf.Throughput_Mbps 8.5% improvement
@ 2026-01-31 13:29 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-01-31 13:29 UTC (permalink / raw)
To: Mel Gorman
Cc: oe-lkp, lkp, linux-kernel, Peter Zijlstra, Madadi Vineeth Reddy,
aubrey.li, yu.c.chen, oliver.sang
Hello,
kernel test robot noticed a 8.5% improvement of netperf.Throughput_Mbps on:
commit: 4f70f106bca1a56bd66d00830ac91680bd754974 ("sched/fair: Disable scheduler feature NEXT_BUDDY")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
testcase: netperf
config: x86_64-rhel-9.4
compiler: gcc-14
test machine: 192 threads 2 sockets Intel(R) Xeon(R) 6740E CPU @ 2.4GHz (Sierra Forest) with 256G memory
parameters:
ip: ipv4
runtime: 300s
nr_threads: 200%
cluster: cs-localhost
test: TCP_STREAM
cpufreq_governor: performance
Details are as below:
-------------------------------------------------------------------------------------------------->
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20260131/202601312046.dea2a8bf-lkp@intel.com
=========================================================================================
cluster/compiler/cpufreq_governor/ip/kconfig/nr_threads/rootfs/runtime/tbox_group/test/testcase:
cs-localhost/gcc-14/performance/ipv4/x86_64-rhel-9.4/200%/debian-13-x86_64-20250902.cgz/300s/lkp-srf-2sp3/TCP_STREAM/netperf
commit:
98c88dc8a1 ("sched/fair: Fix pelt clock sync when entering idle")
4f70f106bc ("sched/fair: Disable scheduler feature NEXT_BUDDY")
98c88dc8a1ace642 4f70f106bca1a56bd66d00830ac
---------------- ---------------------------
%stddev %change %stddev
\ | \
0.94 ± 2% +0.1 1.08 ± 2% mpstat.cpu.all.usr%
1546 ± 11% +30.3% 2015 ± 6% perf-c2c.HITM.local
91440 ± 2% +8.3% 99068 ± 3% vmstat.system.cs
0.08 ± 44% +33.3% 0.10 turbostat.IPC
338.84 ± 44% +21.4% 411.43 turbostat.PkgWatt
6.134e+08 +9.1% 6.692e+08 numa-numastat.node0.local_node
6.135e+08 +9.1% 6.693e+08 numa-numastat.node0.numa_hit
6.189e+08 +7.2% 6.637e+08 numa-numastat.node1.local_node
6.19e+08 +7.2% 6.638e+08 numa-numastat.node1.numa_hit
6.135e+08 +9.1% 6.692e+08 numa-vmstat.node0.numa_hit
6.134e+08 +9.1% 6.692e+08 numa-vmstat.node0.numa_local
6.19e+08 +7.2% 6.637e+08 numa-vmstat.node1.numa_hit
6.189e+08 +7.2% 6.636e+08 numa-vmstat.node1.numa_local
2244672 +6.4% 2388374 meminfo.Active
2244656 +6.4% 2388358 meminfo.Active(anon)
2608934 +5.6% 2756130 meminfo.Committed_AS
11862311 -10.9% 10566854 meminfo.Memused
1269914 +10.9% 1408300 ± 2% meminfo.Shmem
12102805 -12.0% 10644904 meminfo.max_used_kB
561006 +6.4% 597080 proc-vmstat.nr_active_anon
1235403 +2.8% 1270160 proc-vmstat.nr_file_pages
317342 +11.0% 352098 ± 2% proc-vmstat.nr_shmem
561006 +6.4% 597080 proc-vmstat.nr_zone_active_anon
1.232e+09 +8.2% 1.333e+09 proc-vmstat.numa_hit
1.232e+09 +8.2% 1.333e+09 proc-vmstat.numa_local
9.843e+09 +8.2% 1.065e+10 proc-vmstat.pgalloc_normal
9.842e+09 +8.2% 1.064e+10 proc-vmstat.pgfree
2799 +8.5% 3038 netperf.ThroughputBoth_Mbps
1075104 +8.5% 1166788 netperf.ThroughputBoth_total_Mbps
2799 +8.5% 3038 netperf.Throughput_Mbps
1075104 +8.5% 1166788 netperf.Throughput_total_Mbps
5393466 -16.6% 4498332 ± 3% netperf.time.involuntary_context_switches
8777 -2.3% 8573 netperf.time.percent_of_cpu_this_job_got
26432 -2.6% 25744 netperf.time.system_time
241.24 +18.7% 286.46 netperf.time.user_time
7798392 +29.3% 10081565 netperf.time.voluntary_context_switches
2.461e+09 +8.5% 2.671e+09 netperf.workload
5.81 -19.1% 4.70 perf-sched.sch_delay.avg.ms.[unknown].[unknown].[unknown].[unknown].[unknown]
32.01 ± 7% +3062.1% 1012 ± 63% perf-sched.sch_delay.max.ms.[unknown].[unknown].[unknown].[unknown].[unknown]
5.81 -19.1% 4.70 perf-sched.total_sch_delay.average.ms
32.01 ± 7% +3062.1% 1012 ± 63% perf-sched.total_sch_delay.max.ms
17.05 -14.0% 14.67 ± 2% perf-sched.total_wait_and_delay.average.ms
432781 ± 2% +21.2% 524343 ± 5% perf-sched.total_wait_and_delay.count.ms
11.24 -11.3% 9.97 ± 2% perf-sched.total_wait_time.average.ms
17.05 -14.0% 14.67 ± 2% perf-sched.wait_and_delay.avg.ms.[unknown].[unknown].[unknown].[unknown].[unknown]
432781 ± 2% +21.2% 524343 ± 5% perf-sched.wait_and_delay.count.[unknown].[unknown].[unknown].[unknown].[unknown]
11.24 -11.3% 9.97 ± 2% perf-sched.wait_time.avg.ms.[unknown].[unknown].[unknown].[unknown].[unknown]
3.02 -8.1% 2.78 sched_debug.cfs_rq:/.h_nr_runnable.avg
5.44 ± 5% -7.1% 5.06 ± 2% sched_debug.cfs_rq:/.h_nr_runnable.max
0.84 ± 2% -13.6% 0.73 ± 2% sched_debug.cfs_rq:/.h_nr_runnable.stddev
3077 -8.3% 2822 sched_debug.cfs_rq:/.runnable_avg.avg
5181 ± 2% -11.2% 4602 ± 5% sched_debug.cfs_rq:/.runnable_avg.max
713.34 ± 3% -19.0% 577.80 ± 2% sched_debug.cfs_rq:/.runnable_avg.stddev
1907 ± 2% -5.6% 1801 ± 2% sched_debug.cfs_rq:/.util_est.avg
633.28 ± 4% -8.6% 578.69 ± 3% sched_debug.cfs_rq:/.util_est.stddev
791240 -8.3% 725705 ± 2% sched_debug.cpu.avg_idle.avg
247015 ± 3% +10.0% 271600 ± 2% sched_debug.cpu.avg_idle.stddev
130423 ± 10% +26.9% 165570 ± 7% sched_debug.cpu.nr_switches.max
8579 ± 36% +69.3% 14527 ± 21% sched_debug.cpu.nr_switches.stddev
51.90 -12.1% 45.62 perf-stat.i.MPKI
1.103e+10 +9.8% 1.211e+10 perf-stat.i.branch-instructions
0.32 -0.0 0.29 perf-stat.i.branch-miss-rate%
62.97 -6.4 56.58 perf-stat.i.cache-miss-rate%
2.908e+09 -3.0% 2.821e+09 perf-stat.i.cache-misses
4.614e+09 +8.0% 4.981e+09 perf-stat.i.cache-references
89826 ± 2% +7.6% 96633 ± 3% perf-stat.i.context-switches
10.89 -9.4% 9.86 perf-stat.i.cpi
211.22 +3.0% 217.51 perf-stat.i.cycles-between-cache-misses
5.591e+10 +10.3% 6.167e+10 perf-stat.i.instructions
0.10 +9.8% 0.11 perf-stat.i.ipc
52.02 -12.1% 45.75 perf-stat.overall.MPKI
0.32 -0.0 0.29 perf-stat.overall.branch-miss-rate%
63.04 -6.4 56.63 perf-stat.overall.cache-miss-rate%
10.91 -9.4% 9.89 perf-stat.overall.cpi
209.70 +3.1% 216.12 perf-stat.overall.cycles-between-cache-misses
0.09 +10.3% 0.10 perf-stat.overall.ipc
6872 +1.5% 6973 perf-stat.overall.path-length
1.096e+10 +9.8% 1.204e+10 perf-stat.ps.branch-instructions
2.892e+09 -3.0% 2.805e+09 perf-stat.ps.cache-misses
4.587e+09 +8.0% 4.953e+09 perf-stat.ps.cache-references
89124 ± 2% +7.5% 95840 ± 2% perf-stat.ps.context-switches
5.558e+10 +10.3% 6.132e+10 perf-stat.ps.instructions
1.691e+13 +10.1% 1.862e+13 perf-stat.total.instructions
9.28 -2.3 6.96 ± 2% perf-profile.calltrace.cycles-pp.free_pcppages_bulk.free_frozen_page_commit.__free_frozen_pages.skb_release_data.skb_attempt_defer_free
9.46 -2.3 7.14 ± 2% perf-profile.calltrace.cycles-pp.free_frozen_page_commit.__free_frozen_pages.skb_release_data.skb_attempt_defer_free.tcp_recvmsg_locked
8.78 -2.3 6.50 ± 2% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.free_pcppages_bulk.free_frozen_page_commit.__free_frozen_pages
8.81 -2.3 6.54 ± 2% perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.free_pcppages_bulk.free_frozen_page_commit.__free_frozen_pages.skb_release_data
10.82 -2.2 8.65 ± 2% perf-profile.calltrace.cycles-pp.skb_attempt_defer_free.tcp_recvmsg_locked.tcp_recvmsg.inet_recvmsg.sock_recvmsg
10.81 -2.2 8.65 ± 2% perf-profile.calltrace.cycles-pp.skb_release_data.skb_attempt_defer_free.tcp_recvmsg_locked.tcp_recvmsg.inet_recvmsg
10.46 -2.1 8.32 ± 2% perf-profile.calltrace.cycles-pp.__free_frozen_pages.skb_release_data.skb_attempt_defer_free.tcp_recvmsg_locked.tcp_recvmsg
9.36 -2.1 7.25 ± 3% perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_irqsave.rmqueue_bulk.__rmqueue_pcplist.rmqueue
9.86 -2.1 7.74 ± 2% perf-profile.calltrace.cycles-pp.rmqueue_bulk.__rmqueue_pcplist.rmqueue.get_page_from_freelist.__alloc_frozen_pages_noprof
9.87 -2.1 7.76 ± 2% perf-profile.calltrace.cycles-pp.__rmqueue_pcplist.rmqueue.get_page_from_freelist.__alloc_frozen_pages_noprof.alloc_pages_mpol
9.40 -2.1 7.29 ± 3% perf-profile.calltrace.cycles-pp._raw_spin_lock_irqsave.rmqueue_bulk.__rmqueue_pcplist.rmqueue.get_page_from_freelist
9.95 -2.1 7.85 ± 2% perf-profile.calltrace.cycles-pp.rmqueue.get_page_from_freelist.__alloc_frozen_pages_noprof.alloc_pages_mpol.alloc_pages_noprof
10.56 -2.1 8.50 ± 2% perf-profile.calltrace.cycles-pp.alloc_pages_noprof.skb_page_frag_refill.sk_page_frag_refill.tcp_sendmsg_locked.tcp_sendmsg
10.53 -2.1 8.48 ± 2% perf-profile.calltrace.cycles-pp.__alloc_frozen_pages_noprof.alloc_pages_mpol.alloc_pages_noprof.skb_page_frag_refill.sk_page_frag_refill
10.54 -2.0 8.49 ± 2% perf-profile.calltrace.cycles-pp.alloc_pages_mpol.alloc_pages_noprof.skb_page_frag_refill.sk_page_frag_refill.tcp_sendmsg_locked
10.47 -2.0 8.42 ± 2% perf-profile.calltrace.cycles-pp.get_page_from_freelist.__alloc_frozen_pages_noprof.alloc_pages_mpol.alloc_pages_noprof.skb_page_frag_refill
10.71 -1.9 8.78 ± 2% perf-profile.calltrace.cycles-pp.skb_page_frag_refill.sk_page_frag_refill.tcp_sendmsg_locked.tcp_sendmsg.__sys_sendto
10.71 -1.9 8.80 ± 2% perf-profile.calltrace.cycles-pp.sk_page_frag_refill.tcp_sendmsg_locked.tcp_sendmsg.__sys_sendto.__x64_sys_sendto
28.86 -0.7 28.20 perf-profile.calltrace.cycles-pp._copy_from_iter.skb_do_copy_data_nocache.tcp_sendmsg_locked.tcp_sendmsg.__sys_sendto
1.02 ± 14% -0.7 0.36 ±103% perf-profile.calltrace.cycles-pp.simple_copy_to_iter.__skb_datagram_iter.skb_copy_datagram_iter.tcp_recvmsg_locked.tcp_recvmsg
1.01 ± 14% -0.7 0.36 ±103% perf-profile.calltrace.cycles-pp.__check_object_size.simple_copy_to_iter.__skb_datagram_iter.skb_copy_datagram_iter.tcp_recvmsg_locked
1.00 ± 14% -0.6 0.35 ±103% perf-profile.calltrace.cycles-pp.check_heap_object.__check_object_size.simple_copy_to_iter.__skb_datagram_iter.skb_copy_datagram_iter
29.17 -0.6 28.53 perf-profile.calltrace.cycles-pp.skb_do_copy_data_nocache.tcp_sendmsg_locked.tcp_sendmsg.__sys_sendto.__x64_sys_sendto
47.34 -0.6 46.70 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.send_omni_inner.send_tcp_stream.main
47.36 -0.6 46.73 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.send_omni_inner.send_tcp_stream.main
47.22 -0.6 46.61 perf-profile.calltrace.cycles-pp.tcp_sendmsg.__sys_sendto.__x64_sys_sendto.do_syscall_64.entry_SYSCALL_64_after_hwframe
46.89 -0.6 46.30 perf-profile.calltrace.cycles-pp.tcp_sendmsg_locked.tcp_sendmsg.__sys_sendto.__x64_sys_sendto.do_syscall_64
47.45 -0.6 46.87 perf-profile.calltrace.cycles-pp.__x64_sys_sendto.do_syscall_64.entry_SYSCALL_64_after_hwframe.send_omni_inner.send_tcp_stream
47.44 -0.6 46.87 perf-profile.calltrace.cycles-pp.__sys_sendto.__x64_sys_sendto.do_syscall_64.entry_SYSCALL_64_after_hwframe.send_omni_inner
1.99 ± 2% -0.5 1.46 ± 7% perf-profile.calltrace.cycles-pp.ip_finish_output2.ip_output.__ip_queue_xmit.__tcp_transmit_skb.tcp_recvmsg_locked
1.99 ± 2% -0.5 1.46 ± 7% perf-profile.calltrace.cycles-pp.ip_output.__ip_queue_xmit.__tcp_transmit_skb.tcp_recvmsg_locked.tcp_recvmsg
1.99 ± 2% -0.5 1.46 ± 7% perf-profile.calltrace.cycles-pp.__ip_queue_xmit.__tcp_transmit_skb.tcp_recvmsg_locked.tcp_recvmsg.inet_recvmsg
1.86 ± 2% -0.4 1.45 ± 7% perf-profile.calltrace.cycles-pp.__tcp_transmit_skb.tcp_recvmsg_locked.tcp_recvmsg.inet_recvmsg.sock_recvmsg
3.02 -0.3 2.73 ± 9% perf-profile.calltrace.cycles-pp.ip_local_deliver_finish.ip_local_deliver.__netif_receive_skb_one_core.process_backlog.__napi_poll
3.02 -0.3 2.73 ± 9% perf-profile.calltrace.cycles-pp.ip_local_deliver.__netif_receive_skb_one_core.process_backlog.__napi_poll.net_rx_action
3.00 ± 2% -0.3 2.72 ± 9% perf-profile.calltrace.cycles-pp.tcp_v4_rcv.ip_protocol_deliver_rcu.ip_local_deliver_finish.ip_local_deliver.__netif_receive_skb_one_core
3.01 -0.3 2.73 ± 9% perf-profile.calltrace.cycles-pp.ip_protocol_deliver_rcu.ip_local_deliver_finish.ip_local_deliver.__netif_receive_skb_one_core.process_backlog
2.76 -0.2 2.52 ± 10% perf-profile.calltrace.cycles-pp.tcp_rcv_established.tcp_v4_do_rcv.tcp_v4_rcv.ip_protocol_deliver_rcu.ip_local_deliver_finish
3.54 ± 2% -0.2 3.32 ± 3% perf-profile.calltrace.cycles-pp.net_rx_action.handle_softirqs.do_softirq.__local_bh_enable_ip.__dev_queue_xmit
3.58 ± 2% -0.2 3.39 ± 3% perf-profile.calltrace.cycles-pp.handle_softirqs.do_softirq.__local_bh_enable_ip.__dev_queue_xmit.ip_finish_output2
3.59 ± 2% -0.2 3.40 ± 3% perf-profile.calltrace.cycles-pp.do_softirq.__local_bh_enable_ip.__dev_queue_xmit.ip_finish_output2.ip_output
3.09 -0.2 2.90 ± 3% perf-profile.calltrace.cycles-pp.__netif_receive_skb_one_core.process_backlog.__napi_poll.net_rx_action.handle_softirqs
3.12 ± 2% -0.2 2.94 ± 4% perf-profile.calltrace.cycles-pp.__napi_poll.net_rx_action.handle_softirqs.do_softirq.__local_bh_enable_ip
3.11 -0.2 2.94 ± 4% perf-profile.calltrace.cycles-pp.process_backlog.__napi_poll.net_rx_action.handle_softirqs.do_softirq
0.64 -0.1 0.57 perf-profile.calltrace.cycles-pp.__alloc_skb.tcp_stream_alloc_skb.tcp_sendmsg_locked.tcp_sendmsg.__sys_sendto
0.74 -0.0 0.70 perf-profile.calltrace.cycles-pp.tcp_stream_alloc_skb.tcp_sendmsg_locked.tcp_sendmsg.__sys_sendto.__x64_sys_sendto
3.52 +0.3 3.80 ± 3% perf-profile.calltrace.cycles-pp.__dev_queue_xmit.ip_finish_output2.ip_output.__ip_queue_xmit.__tcp_transmit_skb
0.68 ± 3% +0.4 1.07 ± 6% perf-profile.calltrace.cycles-pp.__sk_mem_raise_allocated.__sk_mem_schedule.tcp_try_rmem_schedule.tcp_data_queue.tcp_rcv_established
0.68 ± 3% +0.4 1.07 ± 6% perf-profile.calltrace.cycles-pp.__sk_mem_schedule.tcp_try_rmem_schedule.tcp_data_queue.tcp_rcv_established.tcp_v4_do_rcv
0.68 ± 3% +0.4 1.07 ± 6% perf-profile.calltrace.cycles-pp.tcp_try_rmem_schedule.tcp_data_queue.tcp_rcv_established.tcp_v4_do_rcv.tcp_v4_rcv
0.17 ±141% +0.4 0.57 perf-profile.calltrace.cycles-pp.__tcp_push_pending_frames.tcp_sendmsg_locked.tcp_sendmsg.__sys_sendto.__x64_sys_sendto
0.73 ± 3% +0.4 1.17 ± 5% perf-profile.calltrace.cycles-pp.tcp_data_queue.tcp_rcv_established.tcp_v4_do_rcv.tcp_v4_rcv.ip_protocol_deliver_rcu
0.00 +0.5 0.54 perf-profile.calltrace.cycles-pp.tcp_write_xmit.__tcp_push_pending_frames.tcp_sendmsg_locked.tcp_sendmsg.__sys_sendto
0.17 ±141% +0.6 0.74 ± 8% perf-profile.calltrace.cycles-pp.mem_cgroup_sk_charge.__sk_mem_raise_allocated.__sk_mem_schedule.tcp_try_rmem_schedule.tcp_data_queue
0.09 ±223% +0.6 0.73 ± 8% perf-profile.calltrace.cycles-pp.try_charge_memcg.mem_cgroup_sk_charge.__sk_mem_raise_allocated.__sk_mem_schedule.tcp_try_rmem_schedule
51.15 +0.7 51.82 perf-profile.calltrace.cycles-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.recv_omni.process_requests.spawn_child
50.99 +0.7 51.66 perf-profile.calltrace.cycles-pp.inet_recvmsg.sock_recvmsg.__sys_recvfrom.__x64_sys_recvfrom.do_syscall_64
50.99 +0.7 51.66 perf-profile.calltrace.cycles-pp.tcp_recvmsg.inet_recvmsg.sock_recvmsg.__sys_recvfrom.__x64_sys_recvfrom
51.00 +0.7 51.68 perf-profile.calltrace.cycles-pp.sock_recvmsg.__sys_recvfrom.__x64_sys_recvfrom.do_syscall_64.entry_SYSCALL_64_after_hwframe
51.05 +0.7 51.74 perf-profile.calltrace.cycles-pp.__sys_recvfrom.__x64_sys_recvfrom.do_syscall_64.entry_SYSCALL_64_after_hwframe.recv_omni
51.05 +0.7 51.74 perf-profile.calltrace.cycles-pp.__x64_sys_recvfrom.do_syscall_64.entry_SYSCALL_64_after_hwframe.recv_omni.process_requests
2.08 +0.8 2.84 ± 3% perf-profile.calltrace.cycles-pp.__sk_mem_raise_allocated.__sk_mem_schedule.tcp_wmem_schedule.tcp_sendmsg_locked.tcp_sendmsg
2.09 +0.8 2.86 ± 3% perf-profile.calltrace.cycles-pp.__sk_mem_schedule.tcp_wmem_schedule.tcp_sendmsg_locked.tcp_sendmsg.__sys_sendto
2.10 +0.8 2.87 ± 3% perf-profile.calltrace.cycles-pp.tcp_wmem_schedule.tcp_sendmsg_locked.tcp_sendmsg.__sys_sendto.__x64_sys_sendto
1.56 ± 2% +0.8 2.39 ± 2% perf-profile.calltrace.cycles-pp.ip_finish_output2.ip_output.__ip_queue_xmit.__tcp_transmit_skb.tcp_write_xmit
1.57 ± 2% +0.8 2.41 ± 3% perf-profile.calltrace.cycles-pp.ip_output.__ip_queue_xmit.__tcp_transmit_skb.tcp_write_xmit.tcp_sendmsg_locked
50.68 +0.8 51.52 perf-profile.calltrace.cycles-pp.tcp_recvmsg_locked.tcp_recvmsg.inet_recvmsg.sock_recvmsg.__sys_recvfrom
1.60 ± 2% +0.8 2.44 ± 2% perf-profile.calltrace.cycles-pp.__ip_queue_xmit.__tcp_transmit_skb.tcp_write_xmit.tcp_sendmsg_locked.tcp_sendmsg
2.00 ± 2% +1.0 2.98 ± 2% perf-profile.calltrace.cycles-pp.__tcp_transmit_skb.tcp_write_xmit.tcp_sendmsg_locked.tcp_sendmsg.__sys_sendto
2.21 ± 2% +1.1 3.28 ± 2% perf-profile.calltrace.cycles-pp.tcp_write_xmit.tcp_sendmsg_locked.tcp_sendmsg.__sys_sendto.__x64_sys_sendto
36.33 +3.7 39.99 perf-profile.calltrace.cycles-pp.skb_copy_datagram_iter.tcp_recvmsg_locked.tcp_recvmsg.inet_recvmsg.sock_recvmsg
36.32 +3.7 39.99 perf-profile.calltrace.cycles-pp.__skb_datagram_iter.skb_copy_datagram_iter.tcp_recvmsg_locked.tcp_recvmsg.inet_recvmsg
34.51 +3.9 38.37 perf-profile.calltrace.cycles-pp._copy_to_iter.__skb_datagram_iter.skb_copy_datagram_iter.tcp_recvmsg_locked.tcp_recvmsg
18.51 -4.6 13.93 ± 2% perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath
18.65 -4.6 14.10 ± 2% perf-profile.children.cycles-pp._raw_spin_lock_irqsave
9.70 -2.5 7.24 ± 2% perf-profile.children.cycles-pp.free_frozen_page_commit
9.52 -2.5 7.06 ± 2% perf-profile.children.cycles-pp.free_pcppages_bulk
11.30 -2.4 8.89 ± 2% perf-profile.children.cycles-pp.skb_release_data
10.75 -2.3 8.45 ± 2% perf-profile.children.cycles-pp.__free_frozen_pages
10.82 -2.2 8.65 ± 2% perf-profile.children.cycles-pp.skb_attempt_defer_free
10.00 -2.2 7.85 ± 2% perf-profile.children.cycles-pp.__rmqueue_pcplist
9.99 -2.2 7.83 ± 2% perf-profile.children.cycles-pp.rmqueue_bulk
10.08 -2.1 7.94 ± 2% perf-profile.children.cycles-pp.rmqueue
10.62 -2.1 8.52 ± 2% perf-profile.children.cycles-pp.get_page_from_freelist
10.68 -2.1 8.58 ± 2% perf-profile.children.cycles-pp.__alloc_frozen_pages_noprof
10.69 -2.1 8.59 ± 2% perf-profile.children.cycles-pp.alloc_pages_mpol
10.69 -2.1 8.59 ± 2% perf-profile.children.cycles-pp.alloc_pages_noprof
10.84 -2.0 8.87 ± 2% perf-profile.children.cycles-pp.skb_page_frag_refill
10.85 -2.0 8.89 ± 2% perf-profile.children.cycles-pp.sk_page_frag_refill
29.32 -0.9 28.47 perf-profile.children.cycles-pp._copy_from_iter
29.53 -0.8 28.71 perf-profile.children.cycles-pp.skb_do_copy_data_nocache
47.58 -0.8 46.79 perf-profile.children.cycles-pp.tcp_sendmsg
47.81 -0.8 47.04 perf-profile.children.cycles-pp.__x64_sys_sendto
47.80 -0.8 47.04 perf-profile.children.cycles-pp.__sys_sendto
47.26 -0.8 46.50 perf-profile.children.cycles-pp.tcp_sendmsg_locked
48.33 -0.7 47.62 perf-profile.children.cycles-pp.send_omni_inner
1.58 ± 4% -0.7 0.88 ± 3% perf-profile.children.cycles-pp.__tcp_push_pending_frames
48.18 -0.6 47.60 perf-profile.children.cycles-pp.send_tcp_stream
3.21 ± 2% -0.3 2.92 ± 3% perf-profile.children.cycles-pp.tcp_rcv_established
3.28 ± 2% -0.3 2.99 ± 3% perf-profile.children.cycles-pp.tcp_v4_do_rcv
0.38 ± 5% -0.3 0.11 ± 9% perf-profile.children.cycles-pp.validate_xmit_skb
0.36 ± 5% -0.3 0.09 ± 7% perf-profile.children.cycles-pp.__skb_gso_segment
0.36 ± 5% -0.3 0.09 ± 9% perf-profile.children.cycles-pp.inet_gso_segment
0.36 ± 5% -0.3 0.09 ± 7% perf-profile.children.cycles-pp.skb_mac_gso_segment
0.34 ± 5% -0.3 0.08 ± 8% perf-profile.children.cycles-pp.skb_segment
0.35 ± 5% -0.3 0.09 ± 12% perf-profile.children.cycles-pp.tcp_gso_segment
0.43 ± 9% -0.2 0.22 ± 8% perf-profile.children.cycles-pp.__release_sock
0.49 ± 8% -0.2 0.28 ± 6% perf-profile.children.cycles-pp.release_sock
1.08 -0.2 0.88 perf-profile.children.cycles-pp.simple_copy_to_iter
1.21 -0.2 1.03 perf-profile.children.cycles-pp.check_heap_object
1.24 -0.2 1.07 perf-profile.children.cycles-pp.__check_object_size
0.32 ± 12% -0.2 0.15 ± 19% perf-profile.children.cycles-pp.napi_consume_skb
0.77 -0.1 0.62 perf-profile.children.cycles-pp.__alloc_skb
0.52 -0.1 0.37 perf-profile.children.cycles-pp.kmem_cache_free
0.20 ± 3% -0.1 0.11 perf-profile.children.cycles-pp.kmem_cache_alloc_node_noprof
0.54 ± 6% -0.1 0.45 ± 6% perf-profile.children.cycles-pp.skb_defer_free_flush
0.31 -0.1 0.23 perf-profile.children.cycles-pp.__slab_free
0.13 ± 3% -0.1 0.06 ± 9% perf-profile.children.cycles-pp.kmalloc_reserve
0.16 ± 4% -0.1 0.09 ± 4% perf-profile.children.cycles-pp.__kfree_skb
0.76 -0.1 0.70 perf-profile.children.cycles-pp.tcp_stream_alloc_skb
0.09 ± 8% -0.1 0.03 ± 70% perf-profile.children.cycles-pp.__irq_exit_rcu
0.14 ± 2% -0.1 0.09 perf-profile.children.cycles-pp._raw_spin_unlock_irqrestore
0.45 -0.1 0.40 perf-profile.children.cycles-pp.__free_one_page
0.26 ± 2% -0.0 0.22 ± 2% perf-profile.children.cycles-pp.sock_rfree
0.11 ± 4% -0.0 0.08 ± 6% perf-profile.children.cycles-pp.exit_to_user_mode_loop
0.18 ± 2% -0.0 0.16 ± 3% perf-profile.children.cycles-pp.skb_clone
0.18 ± 2% -0.0 0.16 ± 3% perf-profile.children.cycles-pp.prep_new_page
0.07 +0.0 0.08 perf-profile.children.cycles-pp.__inet_lookup_skb
0.07 +0.0 0.08 perf-profile.children.cycles-pp.lock_sock_nested
0.09 +0.0 0.10 perf-profile.children.cycles-pp.entry_SYSCALL_64
0.07 ± 6% +0.0 0.08 ± 5% perf-profile.children.cycles-pp.arch_exit_to_user_mode_prepare
0.06 +0.0 0.07 ± 5% perf-profile.children.cycles-pp.__inet_lookup_established
0.07 +0.0 0.08 ± 5% perf-profile.children.cycles-pp.__mod_timer
0.11 +0.0 0.13 ± 3% perf-profile.children.cycles-pp._raw_spin_lock_bh
0.07 ± 8% +0.0 0.09 ± 4% perf-profile.children.cycles-pp.tcp_check_space
0.28 +0.0 0.30 perf-profile.children.cycles-pp.__del_page_from_free_list
0.10 +0.0 0.12 perf-profile.children.cycles-pp.read_tsc
0.07 +0.0 0.09 perf-profile.children.cycles-pp._find_next_bit
0.06 +0.0 0.08 perf-profile.children.cycles-pp.rb_erase
0.07 +0.0 0.09 perf-profile.children.cycles-pp.sk_reset_timer
0.12 +0.0 0.14 perf-profile.children.cycles-pp.__virt_addr_valid
0.18 ± 2% +0.0 0.20 ± 2% perf-profile.children.cycles-pp.fdget
0.15 ± 3% +0.0 0.17 ± 2% perf-profile.children.cycles-pp.__zone_watermark_ok
0.37 ± 3% +0.0 0.40 perf-profile.children.cycles-pp.hrtimer_interrupt
0.16 ± 3% +0.0 0.18 ± 2% perf-profile.children.cycles-pp.kfree_skbmem
0.21 ± 3% +0.0 0.24 perf-profile.children.cycles-pp.ktime_get
0.05 +0.0 0.08 perf-profile.children.cycles-pp.tcp_rbtree_insert
0.17 ± 2% +0.0 0.20 ± 2% perf-profile.children.cycles-pp.__schedule
0.08 ± 4% +0.0 0.11 ± 3% perf-profile.children.cycles-pp.sk_stream_wait_memory
0.18 ± 2% +0.0 0.21 ± 2% perf-profile.children.cycles-pp.schedule
0.00 +0.1 0.05 perf-profile.children.cycles-pp.irqtime_account_irq
0.00 +0.1 0.05 perf-profile.children.cycles-pp.sk_stream_write_space
0.12 ± 3% +0.1 0.18 ± 2% perf-profile.children.cycles-pp.tcp_event_new_data_sent
0.00 +0.1 0.06 ± 8% perf-profile.children.cycles-pp.sock_def_readable
0.00 +0.1 0.06 ± 6% perf-profile.children.cycles-pp.sk_wait_data
0.00 +0.1 0.07 perf-profile.children.cycles-pp.try_to_wake_up
0.07 +0.1 0.15 ± 3% perf-profile.children.cycles-pp.schedule_timeout
0.07 ± 5% +0.1 0.15 ± 2% perf-profile.children.cycles-pp.wait_woken
0.00 +0.1 0.08 perf-profile.children.cycles-pp.__wake_up_common
0.96 +0.1 1.10 ± 3% perf-profile.children.cycles-pp.tcp_clean_rtx_queue
1.02 +0.1 1.17 ± 3% perf-profile.children.cycles-pp.tcp_ack
0.77 ± 2% +0.2 0.95 ± 7% perf-profile.children.cycles-pp.__sk_mem_reduce_allocated
0.59 ± 3% +0.2 0.78 ± 8% perf-profile.children.cycles-pp.refill_stock
0.58 ± 3% +0.2 0.77 ± 8% perf-profile.children.cycles-pp.drain_stock
0.85 ± 3% +0.2 1.05 ± 8% perf-profile.children.cycles-pp.page_counter_try_charge
0.91 ± 3% +0.3 1.17 ± 6% perf-profile.children.cycles-pp.tcp_try_rmem_schedule
1.00 ± 2% +0.3 1.31 ± 5% perf-profile.children.cycles-pp.tcp_data_queue
3.81 +0.4 4.17 perf-profile.children.cycles-pp.tcp_write_xmit
51.25 +0.7 51.92 perf-profile.children.cycles-pp.process_requests
51.25 +0.7 51.92 perf-profile.children.cycles-pp.recv_omni
51.25 +0.7 51.92 perf-profile.children.cycles-pp.spawn_child
50.99 +0.7 51.67 perf-profile.children.cycles-pp.tcp_recvmsg
51.00 +0.7 51.68 perf-profile.children.cycles-pp.inet_recvmsg
51.00 +0.7 51.68 perf-profile.children.cycles-pp.sock_recvmsg
51.06 +0.7 51.74 perf-profile.children.cycles-pp.__x64_sys_recvfrom
51.05 +0.7 51.74 perf-profile.children.cycles-pp.__sys_recvfrom
2.13 +0.8 2.89 ± 4% perf-profile.children.cycles-pp.tcp_wmem_schedule
50.68 +0.8 51.53 perf-profile.children.cycles-pp.tcp_recvmsg_locked
3.10 +1.0 4.14 ± 4% perf-profile.children.cycles-pp.__sk_mem_schedule
3.09 +1.0 4.13 ± 4% perf-profile.children.cycles-pp.__sk_mem_raise_allocated
36.33 +3.7 39.99 perf-profile.children.cycles-pp.__skb_datagram_iter
36.33 +3.7 40.00 perf-profile.children.cycles-pp.skb_copy_datagram_iter
34.73 +3.9 38.65 perf-profile.children.cycles-pp._copy_to_iter
18.51 -4.6 13.93 ± 2% perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath
29.20 -0.9 28.34 perf-profile.self.cycles-pp._copy_from_iter
1.06 -0.2 0.87 perf-profile.self.cycles-pp.check_heap_object
0.31 -0.1 0.22 ± 2% perf-profile.self.cycles-pp.__slab_free
0.32 -0.1 0.26 perf-profile.self.cycles-pp.tcp_write_xmit
0.41 -0.1 0.35 perf-profile.self.cycles-pp.__free_one_page
0.51 -0.1 0.46 perf-profile.self.cycles-pp.__skb_datagram_iter
0.53 -0.0 0.48 perf-profile.self.cycles-pp.__alloc_skb
0.13 ± 3% -0.0 0.08 perf-profile.self.cycles-pp.kmem_cache_alloc_node_noprof
0.17 ± 2% -0.0 0.13 ± 2% perf-profile.self.cycles-pp.kmem_cache_free
0.26 ± 2% -0.0 0.22 perf-profile.self.cycles-pp.sock_rfree
0.18 ± 2% -0.0 0.15 ± 2% perf-profile.self.cycles-pp.skb_clone
0.17 ± 2% -0.0 0.15 ± 2% perf-profile.self.cycles-pp.prep_new_page
0.07 +0.0 0.08 perf-profile.self.cycles-pp.__sys_sendto
0.11 +0.0 0.12 perf-profile.self.cycles-pp.send_omni_inner
0.06 +0.0 0.07 perf-profile.self.cycles-pp.__inet_lookup_established
0.09 +0.0 0.10 perf-profile.self.cycles-pp.entry_SYSCALL_64
0.09 +0.0 0.10 perf-profile.self.cycles-pp.read_tsc
0.06 +0.0 0.07 perf-profile.self.cycles-pp.rmqueue
0.13 +0.0 0.14 ± 3% perf-profile.self.cycles-pp.entry_SYSRETQ_unsafe_stack
0.11 +0.0 0.12 ± 4% perf-profile.self.cycles-pp._raw_spin_lock_bh
0.12 ± 5% +0.0 0.14 ± 2% perf-profile.self.cycles-pp.ktime_get
0.28 +0.0 0.30 perf-profile.self.cycles-pp.__del_page_from_free_list
0.17 ± 2% +0.0 0.19 perf-profile.self.cycles-pp.fdget
0.07 +0.0 0.09 perf-profile.self.cycles-pp._find_next_bit
0.06 +0.0 0.08 perf-profile.self.cycles-pp.rb_erase
0.12 +0.0 0.14 perf-profile.self.cycles-pp.__virt_addr_valid
0.15 ± 3% +0.0 0.17 perf-profile.self.cycles-pp.__zone_watermark_ok
0.16 ± 3% +0.0 0.18 ± 2% perf-profile.self.cycles-pp.kfree_skbmem
0.11 +0.0 0.13 ± 2% perf-profile.self.cycles-pp.free_frozen_page_commit
0.06 +0.0 0.09 ± 5% perf-profile.self.cycles-pp.__sk_mem_reduce_allocated
0.28 +0.0 0.31 ± 2% perf-profile.self.cycles-pp.tcp_recvmsg_locked
0.05 +0.0 0.08 perf-profile.self.cycles-pp.tcp_rbtree_insert
0.14 ± 3% +0.0 0.17 ± 2% perf-profile.self.cycles-pp._raw_spin_lock_irqsave
0.21 ± 2% +0.0 0.25 perf-profile.self.cycles-pp.get_page_from_freelist
0.41 +0.0 0.44 perf-profile.self.cycles-pp.__tcp_transmit_skb
0.00 +0.1 0.05 perf-profile.self.cycles-pp.__check_object_size
0.00 +0.1 0.05 perf-profile.self.cycles-pp.ip_finish_output2
0.15 +0.1 0.20 perf-profile.self.cycles-pp.skb_defer_free_flush
0.28 +0.1 0.35 perf-profile.self.cycles-pp.tcp_clean_rtx_queue
0.37 ± 2% +0.1 0.44 ± 3% perf-profile.self.cycles-pp.__dev_queue_xmit
1.11 +0.1 1.23 perf-profile.self.cycles-pp.tcp_sendmsg_locked
0.14 ± 3% +0.1 0.28 perf-profile.self.cycles-pp.skb_page_frag_refill
1.00 +0.2 1.16 perf-profile.self.cycles-pp.__free_frozen_pages
0.84 ± 3% +0.2 1.04 ± 8% perf-profile.self.cycles-pp.page_counter_try_charge
1.38 +0.8 2.15 ± 3% perf-profile.self.cycles-pp.__sk_mem_raise_allocated
34.57 +3.9 38.47 perf-profile.self.cycles-pp._copy_to_iter
Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.
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https://github.com/intel/lkp-tests/wiki
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