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Mon, 31 Jul 2023 07:00:29 -0700 (PDT) MIME-Version: 1.0 References: <202307312121.d8479e5e-oliver.sang@intel.com> In-Reply-To: <202307312121.d8479e5e-oliver.sang@intel.com> From: Eric Dumazet Date: Mon, 31 Jul 2023 16:00:17 +0200 Message-ID: Subject: Re: [linux-next:master] [tcp] dfa2f04833: stress-ng.sock.ops_per_sec -7.3% regression To: kernel test robot Cc: oe-lkp@lists.linux.dev, lkp@intel.com, Linux Memory Management List , Jakub Kicinski , Soheil Hassas Yeganeh , netdev@vger.kernel.org, ying.huang@intel.com, feng.tang@intel.com, fengwei.yin@intel.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: B557F4001D X-Stat-Signature: pi4f3p3iidparau5byiim14mibrghepr X-HE-Tag: 1690812030-992787 X-HE-Meta: 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 F+D58xsD oFY7C3YmmXQ/Zkx8WhsGOOTN+bVDK3xqt5WjreTWHs+jYACieoiMkmPwZ2VkOxbFv3K/UNjQtbOt4wjPTWLVL67bxGaXMna6k1asiR3ncdeUIAjwWwWviWd0Q2LOGhKYbsRwPm8sK9jeJjOUJ8fax3T+LcYvIGeYazUtTCTWtSvE6C7h4kEesm8KGk/IWwBpt9YTmbY/8ZLO0GfdqLTd+2ZD/jEOpKJyP7HJLasKRUxUzPwu0A0K33L1iR9UZcWN3GsrENsTS3iC6SOihfsOiyMxbCkVzsBh9EMCQVVemTEYbWYQCRG5bXKdGi5xQ0V9gUjMHsc1V9lHKPLCCY/9xWU01SHqkq2sWkFxP4AZ6+qOw0d1FURsN9uHBRW1+Xno42yHCzned2GIwHRMS29M76501gbetTG0mNwEx X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, Jul 31, 2023 at 3:35=E2=80=AFPM kernel test robot wrote: > > > > Hello, > > kernel test robot noticed a -7.3% regression of stress-ng.sock.ops_per_se= c on: > > > commit: dfa2f0483360d4d6f2324405464c9f281156bd87 ("tcp: get rid of sysctl= _tcp_adv_win_scale") > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master > > testcase: stress-ng > test machine: 36 threads 1 sockets Intel(R) Core(TM) i9-10980XE CPU @ 3.0= 0GHz (Cascade Lake) with 128G memory > parameters: > TCP 'performance' on some tests depends on initial values for tcp_rmem[] (and many others sysctl) The commit changed some initial RWIN values for some MTU/MSS setings, it is next to impossible to make a change that is a win for all cases. If you care about a particular real workload, not a synthetic benchmark, I think you should give us more details. Thanks. > nr_threads: 1 > disk: 1HDD > testtime: 60s > fs: ext4 > class: os > test: sock > cpufreq_governor: performance > > > > > If you fix the issue in a separate patch/commit (i.e. not just a new vers= ion of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot > | Closes: https://lore.kernel.org/oe-lkp/202307312121.d8479e5e-oliver.san= g@intel.com > > > Details are as below: > -------------------------------------------------------------------------= -------------------------> > > > To reproduce: > > git clone https://github.com/intel/lkp-tests.git > cd lkp-tests > sudo bin/lkp install job.yaml # job file is attached in= this email > bin/lkp split-job --compatible job.yaml # generate the yaml file = for lkp run > sudo bin/lkp run generated-yaml-file > > # if come across any failure that blocks the test, > # please remove ~/.lkp and /lkp dir to run from a clean state. > > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > class/compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_gr= oup/test/testcase/testtime: > os/gcc-12/performance/1HDD/ext4/x86_64-rhel-8.3/1/debian-11.1-x86_64-20= 220510.cgz/lkp-csl-d02/sock/stress-ng/60s > > commit: > 63c8778d91 ("Merge branch 'net-mana-fix-doorbell-access-for-receive-que= ues'") > dfa2f04833 ("tcp: get rid of sysctl_tcp_adv_win_scale") > > 63c8778d9149d5df dfa2f0483360d4d6f2324405464 > ---------------- --------------------------- > %stddev %change %stddev > \ | \ > 8094125 +21.5% 9832824 =C4=85 18% cpuidle..usage > 5.04 -6.1% 4.73 =C4=85 10% iostat.cpu.system > 330990 =C4=85 2% -32.3% 223958 =C4=85 3% turbostat.C1 > 4685666 +22.3% 5729557 turbostat.POLL > 23600 =C4=85 8% +51.9% 35849 =C4=85 25% sched_debug.cfs_r= q:/.min_vruntime.max > 4907 =C4=85 7% +44.2% 7073 =C4=85 45% sched_debug.cfs_r= q:/.min_vruntime.stddev > 4911 =C4=85 7% +44.1% 7075 =C4=85 45% sched_debug.cfs_r= q:/.spread0.stddev > 43.08 =C4=85 15% -41.0% 25.42 =C4=85 32% perf-sched.wait_a= nd_delay.avg.ms.__cond_resched.generic_perform_write.generic_file_write_ite= r.vfs_write.ksys_write > 269948 =C4=85 2% +8.1% 291932 =C4=85 2% perf-sched.wait_a= nd_delay.count.schedule_timeout.wait_woken.sk_wait_data.tcp_recvmsg_locked > 43.08 =C4=85 15% -41.0% 25.42 =C4=85 32% perf-sched.wait_t= ime.avg.ms.__cond_resched.generic_perform_write.generic_file_write_iter.vfs= _write.ksys_write > 0.02 =C4=85 31% +35.0% 0.03 =C4=85 5% perf-sched.wait_t= ime.max.ms.__cond_resched.aa_sk_perm.security_socket_sendmsg.sock_sendmsg._= _sys_sendto > 93552 -7.3% 86706 stress-ng.sock.ops > 1559 -7.3% 1445 stress-ng.sock.ops_per_sec > 139.17 -3.4% 134.50 stress-ng.time.percent_of_c= pu_this_job_got > 5092570 +18.6% 6039727 stress-ng.time.voluntary_co= ntext_switches > 1.45 +1.4 2.83 =C4=85105% perf-stat.i.branch-mis= s-rate% > 1620951 =C4=85 30% -39.7% 977769 =C4=85 37% perf-stat.i.dTLB-= store-misses > 911.68 -3.6% 878.55 perf-stat.i.instructions-pe= r-iTLB-miss > 1.54 +0.2 1.69 =C4=85 15% perf-stat.overall.bran= ch-miss-rate% > 0.16 =C4=85 30% -0.1 0.10 =C4=85 22% perf-stat.overall= .dTLB-store-miss-rate% > 742.16 -4.3% 710.16 perf-stat.overall.instructi= ons-per-iTLB-miss > 1595258 =C4=85 30% -39.6% 962800 =C4=85 37% perf-stat.ps.dTLB= -store-misses > 67709 +12.6% 76211 =C4=85 14% proc-vmstat.nr_active_= anon > 73849 +11.0% 81975 =C4=85 11% proc-vmstat.nr_shmem > 67709 +12.6% 76211 =C4=85 14% proc-vmstat.nr_zone_ac= tive_anon > 6320969 -6.7% 5895784 proc-vmstat.numa_hit > 6314894 -6.8% 5885708 proc-vmstat.numa_local > 102508 +5.9% 108525 proc-vmstat.pgactivate > 48068383 -7.3% 44558110 proc-vmstat.pgalloc_normal > 47937851 -7.3% 44421205 proc-vmstat.pgfree > 0.70 =C4=85 14% +0.2 0.88 =C4=85 14% perf-profile.call= trace.cycles-pp.sched_ttwu_pending.__flush_smp_call_function_queue.flush_sm= p_call_function_queue.do_idle.cpu_startup_entry > 0.48 =C4=85 47% +0.2 0.70 =C4=85 14% perf-profile.call= trace.cycles-pp.schedule_idle.do_idle.cpu_startup_entry.start_secondary.sec= ondary_startup_64_no_verify > 2.76 =C4=85 9% +0.5 3.30 =C4=85 2% perf-profile.call= trace.cycles-pp.tcp_rcv_established.tcp_v4_do_rcv.tcp_v4_rcv.ip_protocol_de= liver_rcu.ip_local_deliver_finish > 0.39 =C4=85 72% +0.6 0.95 =C4=85 24% perf-profile.call= trace.cycles-pp.try_to_wake_up.__wake_up_common.__wake_up_common_lock.sock_= def_readable.tcp_data_queue > 3.32 =C4=85 10% +0.7 4.00 perf-profile.calltrace= .cycles-pp.tcp_v4_do_rcv.tcp_v4_rcv.ip_protocol_deliver_rcu.ip_local_delive= r_finish.__netif_receive_skb_one_core > 6.88 =C4=85 7% +0.8 7.71 =C4=85 2% perf-profile.call= trace.cycles-pp.__netif_receive_skb_one_core.process_backlog.__napi_poll.ne= t_rx_action.__do_softirq > 7.18 =C4=85 7% +0.8 8.02 =C4=85 2% perf-profile.call= trace.cycles-pp.__napi_poll.net_rx_action.__do_softirq.do_softirq.__local_b= h_enable_ip > 7.16 =C4=85 7% +0.9 8.02 =C4=85 2% perf-profile.call= trace.cycles-pp.process_backlog.__napi_poll.net_rx_action.__do_softirq.do_s= oftirq > 8.90 =C4=85 6% +1.0 9.89 perf-profile.calltrace= .cycles-pp.net_rx_action.__do_softirq.do_softirq.__local_bh_enable_ip.__dev= _queue_xmit > 9.37 =C4=85 6% +1.0 10.40 perf-profile.calltrace= .cycles-pp.__local_bh_enable_ip.__dev_queue_xmit.ip_finish_output2.__ip_que= ue_xmit.__tcp_transmit_skb > 9.33 =C4=85 6% +1.0 10.37 perf-profile.calltrace= .cycles-pp.do_softirq.__local_bh_enable_ip.__dev_queue_xmit.ip_finish_outpu= t2.__ip_queue_xmit > 9.26 =C4=85 6% +1.0 10.30 perf-profile.calltrace= .cycles-pp.__do_softirq.do_softirq.__local_bh_enable_ip.__dev_queue_xmit.ip= _finish_output2 > 2.48 =C4=85 17% +1.3 3.82 =C4=85 2% perf-profile.call= trace.cycles-pp.__ip_queue_xmit.__tcp_transmit_skb.tcp_write_xmit.__tcp_pus= h_pending_frames.tcp_sendmsg_locked > 2.61 =C4=85 17% +1.3 3.96 =C4=85 2% perf-profile.call= trace.cycles-pp.__tcp_transmit_skb.tcp_write_xmit.__tcp_push_pending_frames= .tcp_sendmsg_locked.tcp_sendmsg > 0.80 =C4=85 15% -0.4 0.43 =C4=85 10% perf-profile.chil= dren.cycles-pp.tcp_rcv_space_adjust > 1.35 =C4=85 5% -0.2 1.19 =C4=85 6% perf-profile.chil= dren.cycles-pp.__entry_text_start > 0.56 =C4=85 15% -0.2 0.40 =C4=85 11% perf-profile.chil= dren.cycles-pp.__x64_sys_connect > 0.56 =C4=85 15% -0.2 0.40 =C4=85 11% perf-profile.chil= dren.cycles-pp.__sys_connect > 0.55 =C4=85 14% -0.2 0.40 =C4=85 12% perf-profile.chil= dren.cycles-pp.inet_stream_connect > 0.55 =C4=85 15% -0.1 0.40 =C4=85 12% perf-profile.chil= dren.cycles-pp.__inet_stream_connect > 0.38 =C4=85 11% -0.1 0.28 =C4=85 21% perf-profile.chil= dren.cycles-pp.exit_to_user_mode_loop > 0.44 =C4=85 9% -0.1 0.33 =C4=85 13% perf-profile.chil= dren.cycles-pp.__close > 0.37 =C4=85 12% -0.1 0.27 =C4=85 20% perf-profile.chil= dren.cycles-pp.task_work_run > 0.77 =C4=85 5% -0.1 0.68 =C4=85 8% perf-profile.chil= dren.cycles-pp.syscall_exit_to_user_mode > 0.34 =C4=85 12% -0.1 0.26 =C4=85 21% perf-profile.chil= dren.cycles-pp.__fput > 0.31 =C4=85 11% -0.1 0.23 =C4=85 18% perf-profile.chil= dren.cycles-pp.tcp_v4_connect > 0.22 =C4=85 14% -0.1 0.16 =C4=85 22% perf-profile.chil= dren.cycles-pp.__sock_release > 0.22 =C4=85 14% -0.1 0.16 =C4=85 22% perf-profile.chil= dren.cycles-pp.sock_close > 0.23 =C4=85 19% -0.1 0.16 =C4=85 14% perf-profile.chil= dren.cycles-pp.tcp_try_coalesce > 0.09 =C4=85 14% -0.0 0.05 =C4=85 48% perf-profile.chil= dren.cycles-pp.new_inode_pseudo > 0.07 =C4=85 12% -0.0 0.04 =C4=85 72% perf-profile.chil= dren.cycles-pp.__ns_get_path > 0.17 =C4=85 8% +0.0 0.22 =C4=85 8% perf-profile.chil= dren.cycles-pp.ip_send_check > 0.23 =C4=85 7% +0.0 0.28 =C4=85 7% perf-profile.chil= dren.cycles-pp.ip_local_out > 0.09 =C4=85 22% +0.0 0.14 =C4=85 10% perf-profile.chil= dren.cycles-pp.available_idle_cpu > 0.22 =C4=85 9% +0.1 0.26 =C4=85 7% perf-profile.chil= dren.cycles-pp.__ip_local_out > 0.46 =C4=85 11% +0.1 0.56 =C4=85 4% perf-profile.chil= dren.cycles-pp.ttwu_queue_wakelist > 0.92 =C4=85 3% +0.1 1.06 =C4=85 5% perf-profile.chil= dren.cycles-pp._raw_spin_lock_irqsave > 7.10 =C4=85 2% +0.7 7.76 =C4=85 3% perf-profile.chil= dren.cycles-pp.tcp_v4_rcv > 7.21 =C4=85 2% +0.7 7.90 =C4=85 3% perf-profile.chil= dren.cycles-pp.ip_protocol_deliver_rcu > 7.42 =C4=85 2% +0.7 8.12 =C4=85 3% perf-profile.chil= dren.cycles-pp.ip_local_deliver_finish > 8.00 =C4=85 2% +0.7 8.71 =C4=85 2% perf-profile.chil= dren.cycles-pp.__netif_receive_skb_one_core > 8.34 =C4=85 2% +0.7 9.06 =C4=85 2% perf-profile.chil= dren.cycles-pp.__napi_poll > 8.32 =C4=85 2% +0.7 9.05 =C4=85 2% perf-profile.chil= dren.cycles-pp.process_backlog > 11.71 =C4=85 3% +0.9 12.63 =C4=85 2% perf-profile.chil= dren.cycles-pp.__dev_queue_xmit > 13.86 =C4=85 2% +0.9 14.78 =C4=85 2% perf-profile.chil= dren.cycles-pp.__tcp_transmit_skb > 11.92 =C4=85 2% +0.9 12.86 =C4=85 2% perf-profile.chil= dren.cycles-pp.ip_finish_output2 > 10.05 =C4=85 3% +0.9 10.99 =C4=85 2% perf-profile.chil= dren.cycles-pp.net_rx_action > 12.66 =C4=85 2% +1.0 13.62 =C4=85 2% perf-profile.chil= dren.cycles-pp.__ip_queue_xmit > 10.56 =C4=85 3% +1.0 11.53 =C4=85 2% perf-profile.chil= dren.cycles-pp.do_softirq > 10.82 =C4=85 3% +1.0 11.80 =C4=85 2% perf-profile.chil= dren.cycles-pp.__local_bh_enable_ip > 10.94 =C4=85 4% +1.0 11.94 =C4=85 2% perf-profile.chil= dren.cycles-pp.__do_softirq > 0.52 =C4=85 21% -0.4 0.16 =C4=85 16% perf-profile.self= .cycles-pp.tcp_rcv_space_adjust > 0.62 =C4=85 7% -0.1 0.48 =C4=85 10% perf-profile.self= .cycles-pp.tcp_sendmsg > 0.63 =C4=85 5% -0.1 0.55 =C4=85 7% perf-profile.self= .cycles-pp.__entry_text_start > 0.10 =C4=85 15% +0.0 0.14 =C4=85 13% perf-profile.self= .cycles-pp.schedule_timeout > 0.10 =C4=85 20% +0.0 0.14 =C4=85 16% perf-profile.self= .cycles-pp.enqueue_entity > 0.08 =C4=85 22% +0.1 0.14 =C4=85 11% perf-profile.self= .cycles-pp.available_idle_cpu > 0.37 =C4=85 8% +0.1 0.44 =C4=85 4% perf-profile.self= .cycles-pp.net_rx_action > 0.92 =C4=85 3% +0.1 1.06 =C4=85 5% perf-profile.self= .cycles-pp._raw_spin_lock_irqsave > > > > > Disclaimer: > Results have been estimated based on internal Intel analysis and are prov= ided > for informational purposes only. Any difference in system hardware or sof= tware > design or configuration may affect actual performance. > > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wiki > >