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sc06F+9vdz9RQJJVz+QW3sqWh0mxXEjDx3NIYzcdWUAFfZ98DAlJKIbkJsCWCH5c5K0wELqQ1Ij/35MlfXxrnQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR11MB7060 X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 26.0% improvement of stress-ng.sockmany.ops_per_sec on: commit: 265acc444f8a96246e9d42b54b6931d078034218 ("[PATCH net-next 1/2] inet: change lport contribution to inet_ehashfn() and inet6_ehashfn()") url: https://github.com/intel-lab-lkp/linux/commits/Eric-Dumazet/inet-change-lport-contribution-to-inet_ehashfn-and-inet6_ehashfn/20250305-114734 base: https://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git f252f23ab657cd224cb8334ba69966396f3f629b patch link: https://lore.kernel.org/all/20250305034550.879255-2-edumazet@google.com/ patch subject: [PATCH net-next 1/2] inet: change lport contribution to inet_ehashfn() and inet6_ehashfn() testcase: stress-ng config: x86_64-rhel-9.4 compiler: gcc-12 test machine: 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory parameters: nr_threads: 100% testtime: 60s test: sockmany cpufreq_governor: performance In addition to that, the commit also has significant impact on the following tests: +------------------+---------------------------------------------------------------------------------------------+ | testcase: change | stress-ng: stress-ng.sockmany.ops_per_sec 4.4% improvement | | test machine | 224 threads 2 sockets Intel(R) Xeon(R) Platinum 8480CTDX (Sapphire Rapids) with 256G memory | | test parameters | cpufreq_governor=performance | | | nr_threads=100% | | | test=sockmany | | | testtime=60s | +------------------+---------------------------------------------------------------------------------------------+ Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250317/202503171623.f2e16b60-lkp@intel.com ========================================================================================= compiler/cpufreq_governor/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime: gcc-12/performance/x86_64-rhel-9.4/100%/debian-12-x86_64-20240206.cgz/lkp-icl-2sp8/sockmany/stress-ng/60s commit: f252f23ab6 ("net: Prevent use after free in netif_napi_set_irq_locked()") 265acc444f ("inet: change lport contribution to inet_ehashfn() and inet6_ehashfn()") f252f23ab657cd22 265acc444f8a96246e9d42b54b6 ---------------- --------------------------- %stddev %change %stddev \ | \ 0.60 ± 6% +0.2 0.75 ± 6% mpstat.cpu.all.soft% 376850 ± 9% +15.7% 436068 ± 9% numa-numastat.node0.local_node 376612 ± 9% +15.8% 435968 ± 9% numa-vmstat.node0.numa_local 54708 +22.0% 66753 ± 2% vmstat.system.cs 2308 +1167.7% 29267 ± 26% perf-c2c.HITM.local 2499 +1078.3% 29447 ± 26% perf-c2c.HITM.total 1413 ± 8% -13.8% 1218 ± 4% sched_debug.cfs_rq:/.runnable_avg.max 28302 +21.2% 34303 ± 2% sched_debug.cpu.nr_switches.avg 39625 ± 6% +63.4% 64761 ± 6% sched_debug.cpu.nr_switches.max 4170 ± 9% +126.1% 9429 ± 8% sched_debug.cpu.nr_switches.stddev 1606932 +25.9% 2023746 ± 3% stress-ng.sockmany.ops 26687 +26.0% 33624 ± 3% stress-ng.sockmany.ops_per_sec 1561801 +28.1% 2000939 ± 3% stress-ng.time.involuntary_context_switches 1731525 +22.3% 2118259 ± 2% stress-ng.time.voluntary_context_switches 84783 +2.6% 86953 proc-vmstat.nr_shmem 5339 ± 6% -26.4% 3931 ± 16% proc-vmstat.numa_hint_faults_local 878479 +6.8% 937819 proc-vmstat.numa_hit 812262 +7.3% 871615 proc-vmstat.numa_local 2550690 +12.5% 2870404 proc-vmstat.pgalloc_normal 2407108 +13.2% 2724922 proc-vmstat.pgfree 21.96 -17.2% 18.18 ± 2% perf-stat.i.MPKI 7.517e+09 +18.8% 8.933e+09 perf-stat.i.branch-instructions 2.70 -0.7 1.96 perf-stat.i.branch-miss-rate% 2.03e+08 -13.1% 1.765e+08 perf-stat.i.branch-misses 60.22 -2.3 57.89 ± 2% perf-stat.i.cache-miss-rate% 1.472e+09 +4.7% 1.542e+09 perf-stat.i.cache-references 56669 +22.3% 69301 ± 2% perf-stat.i.context-switches 5.56 -18.4% 4.53 ± 2% perf-stat.i.cpi 4.24e+10 +19.2% 5.054e+10 perf-stat.i.instructions 0.20 +20.1% 0.24 ± 4% perf-stat.i.ipc 0.49 +21.0% 0.60 ± 8% perf-stat.i.metric.K/sec 21.03 -15.1% 17.85 perf-stat.overall.MPKI 2.70 -0.7 1.98 perf-stat.overall.branch-miss-rate% 60.56 -2.1 58.49 perf-stat.overall.cache-miss-rate% 5.34 -16.6% 4.45 perf-stat.overall.cpi 253.77 -1.7% 249.50 perf-stat.overall.cycles-between-cache-misses 0.19 +19.9% 0.22 perf-stat.overall.ipc 7.395e+09 +18.9% 8.789e+09 perf-stat.ps.branch-instructions 1.997e+08 -13.0% 1.737e+08 perf-stat.ps.branch-misses 1.448e+09 +4.7% 1.517e+09 perf-stat.ps.cache-references 55820 +22.2% 68204 ± 2% perf-stat.ps.context-switches 4.172e+10 +19.2% 4.972e+10 perf-stat.ps.instructions 2.556e+12 +20.2% 3.072e+12 ± 2% perf-stat.total.instructions 0.35 ± 9% -14.9% 0.29 ± 6% perf-sched.sch_delay.avg.ms.__cond_resched.__inet_hash_connect.tcp_v4_connect.__inet_stream_connect.inet_stream_connect 0.06 ± 7% -20.5% 0.04 ± 4% perf-sched.sch_delay.avg.ms.__cond_resched.__release_sock.release_sock.__inet_stream_connect.inet_stream_connect 0.16 ±218% +798.3% 1.44 ± 40% perf-sched.sch_delay.avg.ms.__cond_resched.kmem_cache_alloc_noprof.alloc_empty_file.alloc_file_pseudo.sock_alloc_file 0.25 ±152% +291.3% 0.99 ± 45% perf-sched.sch_delay.avg.ms.__cond_resched.kmem_cache_alloc_noprof.security_inode_alloc.inode_init_always_gfp.alloc_inode 0.11 ±166% +568.2% 0.75 ± 45% perf-sched.sch_delay.avg.ms.__cond_resched.lock_sock_nested.inet_stream_connect.__sys_connect.__x64_sys_connect 0.84 ± 14% +39.2% 1.17 ± 9% perf-sched.sch_delay.avg.ms.__cond_resched.stop_one_cpu.sched_exec.bprm_execve.part 0.11 ± 22% +108.5% 0.23 ± 12% perf-sched.sch_delay.avg.ms.schedule_timeout.wait_woken.sk_wait_data.tcp_recvmsg_locked 0.08 ± 59% -60.0% 0.03 ± 4% perf-sched.sch_delay.max.ms.__cond_resched.__release_sock.release_sock.tcp_sendmsg.__sys_sendto 0.16 ±218% +1286.4% 2.22 ± 25% perf-sched.sch_delay.max.ms.__cond_resched.kmem_cache_alloc_noprof.alloc_empty_file.alloc_file_pseudo.sock_alloc_file 0.13 ±153% +910.1% 1.27 ± 34% perf-sched.sch_delay.max.ms.__cond_resched.lock_sock_nested.inet_stream_connect.__sys_connect.__x64_sys_connect 9.23 -12.5% 8.08 perf-sched.total_wait_and_delay.average.ms 139892 +15.3% 161338 perf-sched.total_wait_and_delay.count.ms 9.18 -12.5% 8.03 perf-sched.total_wait_time.average.ms 0.70 ± 8% -14.5% 0.60 ± 6% perf-sched.wait_and_delay.avg.ms.__cond_resched.__inet_hash_connect.tcp_v4_connect.__inet_stream_connect.inet_stream_connect 0.11 ± 8% -20.1% 0.09 ± 4% perf-sched.wait_and_delay.avg.ms.__cond_resched.__release_sock.release_sock.__inet_stream_connect.inet_stream_connect 429.48 ± 44% +63.6% 702.60 ± 11% perf-sched.wait_and_delay.avg.ms.devkmsg_read.vfs_read.ksys_read.do_syscall_64 4.97 -14.0% 4.28 perf-sched.wait_and_delay.avg.ms.schedule_timeout.inet_csk_accept.inet_accept.do_accept 0.23 ± 21% +104.2% 0.46 ± 12% perf-sched.wait_and_delay.avg.ms.schedule_timeout.wait_woken.sk_wait_data.tcp_recvmsg_locked 48576 ± 5% +36.3% 66215 ± 2% perf-sched.wait_and_delay.count.__cond_resched.__release_sock.release_sock.__inet_stream_connect.inet_stream_connect 81.83 +9.8% 89.83 ± 2% perf-sched.wait_and_delay.count.schedule_hrtimeout_range.do_poll.constprop.0.do_sys_poll 64098 +16.3% 74560 perf-sched.wait_and_delay.count.schedule_timeout.inet_csk_accept.inet_accept.do_accept 15531 ± 17% -46.2% 8355 ± 6% perf-sched.wait_and_delay.count.schedule_timeout.wait_woken.sk_wait_data.tcp_recvmsg_locked 0.36 ± 8% -14.2% 0.31 ± 6% perf-sched.wait_time.avg.ms.__cond_resched.__inet_hash_connect.tcp_v4_connect.__inet_stream_connect.inet_stream_connect 0.06 ± 7% -20.2% 0.04 ± 4% perf-sched.wait_time.avg.ms.__cond_resched.__release_sock.release_sock.__inet_stream_connect.inet_stream_connect 0.04 ±178% -94.4% 0.00 ±130% perf-sched.wait_time.avg.ms.__cond_resched.down_write_killable.exec_mmap.begin_new_exec.load_elf_binary 0.16 ±218% +798.5% 1.44 ± 40% perf-sched.wait_time.avg.ms.__cond_resched.kmem_cache_alloc_noprof.alloc_empty_file.alloc_file_pseudo.sock_alloc_file 0.11 ±166% +568.6% 0.75 ± 45% perf-sched.wait_time.avg.ms.__cond_resched.lock_sock_nested.inet_stream_connect.__sys_connect.__x64_sys_connect 427.69 ± 45% +63.1% 697.48 ± 10% perf-sched.wait_time.avg.ms.devkmsg_read.vfs_read.ksys_read.do_syscall_64 4.95 -14.0% 4.26 perf-sched.wait_time.avg.ms.schedule_timeout.inet_csk_accept.inet_accept.do_accept 0.12 ± 20% +99.9% 0.23 ± 12% perf-sched.wait_time.avg.ms.schedule_timeout.wait_woken.sk_wait_data.tcp_recvmsg_locked 0.16 ±218% +1286.4% 2.22 ± 25% perf-sched.wait_time.max.ms.__cond_resched.kmem_cache_alloc_noprof.alloc_empty_file.alloc_file_pseudo.sock_alloc_file 0.13 ±153% +911.4% 1.27 ± 34% perf-sched.wait_time.max.ms.__cond_resched.lock_sock_nested.inet_stream_connect.__sys_connect.__x64_sys_connect *************************************************************************************************** lkp-spr-r02: 224 threads 2 sockets Intel(R) Xeon(R) Platinum 8480CTDX (Sapphire Rapids) with 256G memory ========================================================================================= compiler/cpufreq_governor/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime: gcc-12/performance/x86_64-rhel-9.4/100%/debian-12-x86_64-20240206.cgz/lkp-spr-r02/sockmany/stress-ng/60s commit: f252f23ab6 ("net: Prevent use after free in netif_napi_set_irq_locked()") 265acc444f ("inet: change lport contribution to inet_ehashfn() and inet6_ehashfn()") f252f23ab657cd22 265acc444f8a96246e9d42b54b6 ---------------- --------------------------- %stddev %change %stddev \ | \ 205766 +3.2% 212279 vmstat.system.cs 309724 ± 5% +63.6% 506684 ± 9% sched_debug.cfs_rq:/.avg_vruntime.stddev 309724 ± 5% +63.6% 506684 ± 9% sched_debug.cfs_rq:/.min_vruntime.stddev 1307371 ± 8% -14.5% 1117523 ± 7% sched_debug.cpu.avg_idle.max 4333131 +4.4% 4525951 stress-ng.sockmany.ops 71816 +4.4% 74988 stress-ng.sockmany.ops_per_sec 7639150 +3.6% 7910527 stress-ng.time.voluntary_context_switches 693603 -18.6% 564616 ± 3% perf-c2c.DRAM.local 611374 -16.8% 508688 ± 2% perf-c2c.DRAM.remote 19509 +994.2% 213470 ± 7% perf-c2c.HITM.local 20252 +957.6% 214187 ± 7% perf-c2c.HITM.total 204521 +3.1% 210765 proc-vmstat.nr_shmem 938137 +2.9% 965493 proc-vmstat.nr_slab_reclaimable 3102658 +3.0% 3196837 proc-vmstat.nr_slab_unreclaimable 2113801 +1.8% 2151131 proc-vmstat.numa_hit 1881174 +2.0% 1919223 proc-vmstat.numa_local 6186586 +3.6% 6406837 proc-vmstat.pgalloc_normal 0.76 ± 46% -83.0% 0.13 ±144% perf-sched.sch_delay.avg.ms.__cond_resched.mutex_lock.perf_poll.do_poll.constprop 0.02 ± 2% -6.3% 0.02 ± 2% perf-sched.sch_delay.avg.ms.schedule_timeout.inet_csk_accept.inet_accept.do_accept 15.43 -12.6% 13.48 perf-sched.total_wait_and_delay.average.ms 234971 +15.6% 271684 perf-sched.total_wait_and_delay.count.ms 15.37 -12.6% 13.43 perf-sched.total_wait_time.average.ms 140.18 ± 5% -37.2% 88.02 ± 11% perf-sched.wait_and_delay.avg.ms.schedule_hrtimeout_range.do_poll.constprop.0.do_sys_poll 10.17 -14.1% 8.74 perf-sched.wait_and_delay.avg.ms.schedule_timeout.inet_csk_accept.inet_accept.do_accept 4.02 -100.0% 0.00 perf-sched.wait_and_delay.avg.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread 104089 +16.4% 121193 perf-sched.wait_and_delay.count.__cond_resched.__release_sock.release_sock.__inet_stream_connect.inet_stream_connect 88.17 ± 6% +68.1% 148.17 ± 13% perf-sched.wait_and_delay.count.schedule_hrtimeout_range.do_poll.constprop.0.do_sys_poll 108724 +16.8% 127034 perf-sched.wait_and_delay.count.schedule_timeout.inet_csk_accept.inet_accept.do_accept 1232 -100.0% 0.00 perf-sched.wait_and_delay.count.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread 4592 ± 12% +26.1% 5792 ± 14% perf-sched.wait_and_delay.count.schedule_timeout.wait_woken.sk_wait_data.tcp_recvmsg_locked 11.29 ± 68% -100.0% 0.00 perf-sched.wait_and_delay.max.ms.schedule_timeout.rcu_gp_fqs_loop.rcu_gp_kthread.kthread 9.99 -13.3% 8.66 perf-sched.wait_time.avg.ms.__cond_resched.__release_sock.release_sock.tcp_sendmsg.__sys_sendto 139.53 ± 6% -37.2% 87.60 ± 11% perf-sched.wait_time.avg.ms.schedule_hrtimeout_range.do_poll.constprop.0.do_sys_poll 10.15 -14.1% 8.72 perf-sched.wait_time.avg.ms.schedule_timeout.inet_csk_accept.inet_accept.do_accept 41.10 -17.2% 34.03 perf-stat.i.MPKI 1.424e+10 +14.6% 1.631e+10 perf-stat.i.branch-instructions 2.28 -0.1 2.17 perf-stat.i.branch-miss-rate% 3.193e+08 +9.4% 3.492e+08 perf-stat.i.branch-misses 77.01 -9.5 67.48 perf-stat.i.cache-miss-rate% 2.981e+09 -5.1% 2.83e+09 perf-stat.i.cache-misses 3.806e+09 +8.4% 4.127e+09 perf-stat.i.cache-references 217129 +3.2% 224056 perf-stat.i.context-switches 8.68 -12.7% 7.58 perf-stat.i.cpi 242.24 +4.0% 251.97 perf-stat.i.cycles-between-cache-misses 7.608e+10 +14.1% 8.679e+10 perf-stat.i.instructions 0.13 +13.3% 0.15 perf-stat.i.ipc 39.15 -16.8% 32.58 perf-stat.overall.MPKI 2.24 -0.1 2.14 perf-stat.overall.branch-miss-rate% 78.30 -9.7 68.56 perf-stat.overall.cache-miss-rate% 8.35 -12.4% 7.31 perf-stat.overall.cpi 213.17 +5.3% 224.53 perf-stat.overall.cycles-between-cache-misses 0.12 +14.1% 0.14 perf-stat.overall.ipc 1.401e+10 +14.6% 1.604e+10 perf-stat.ps.branch-instructions 3.139e+08 +9.4% 3.434e+08 perf-stat.ps.branch-misses 2.931e+09 -5.1% 2.782e+09 perf-stat.ps.cache-misses 3.743e+09 +8.4% 4.058e+09 perf-stat.ps.cache-references 213541 +3.3% 220574 perf-stat.ps.context-switches 7.485e+10 +14.1% 8.539e+10 perf-stat.ps.instructions 4.597e+12 +13.9% 5.235e+12 perf-stat.total.instructions 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. -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki