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46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: VxyrdD3XdDAoZBdacFdT0lnMyYBt+oyGzMpD+bViVQ11ciIidF5SUqlQkbRZ4IJhKiWLMks6ZyVEth4mKbuDmg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW3PR11MB4636 X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 17.2% regression of netperf.Throughput_tps on: commit: 16c610162d1f1c332209de1c91ffb09b659bb65d ("net: call cond_resched() less often in __release_sock()") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master [still regression on linus/master dcb6fa37fd7bc9c3d2b066329b0d27dedf8becaa] [still regression on linux-next/master 8fec172c82c2b5f6f8e47ab837c1dc91ee3d1b87] 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_CRR cpufreq_governor: performance If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202510281337.398a9aa9-lkp@intel.com Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20251028/202510281337.398a9aa9-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_CRR/netperf commit: abfa70b380 ("Merge branch 'tcp-__tcp_close-changes'") 16c610162d ("net: call cond_resched() less often in __release_sock()") abfa70b380348cf4 16c610162d1f1c332209de1c91f ---------------- --------------------------- %stddev %change %stddev \ | \ 2.80 -0.4 2.43 ± 3% mpstat.cpu.all.usr% 199581 ± 96% -75.4% 49072 ± 64% numa-meminfo.node0.Mapped 6583442 ± 6% -30.2% 4594175 ± 5% numa-numastat.node0.local_node 6709344 ± 6% -30.4% 4672973 ± 5% numa-numastat.node0.numa_hit 50277 ± 96% -75.4% 12383 ± 63% numa-vmstat.node0.nr_mapped 6708267 ± 6% -30.3% 4672365 ± 5% numa-vmstat.node0.numa_hit 6582364 ± 6% -30.2% 4593568 ± 5% numa-vmstat.node0.numa_local 224.83 ±100% +224.8% 730.17 ± 36% perf-c2c.DRAM.local 1438 ±100% +132.4% 3343 ± 11% perf-c2c.DRAM.remote 1569 ±100% +115.5% 3383 ± 10% perf-c2c.HITM.local 1089 ±100% +121.1% 2408 ± 10% perf-c2c.HITM.remote 14776381 ± 9% -21.6% 11587148 ± 8% proc-vmstat.numa_hit 14576750 ± 9% -21.9% 11387471 ± 8% proc-vmstat.numa_local 51492399 ± 6% -26.1% 38054262 ± 5% proc-vmstat.pgalloc_normal 48277971 ± 5% -26.9% 35310227 ± 5% proc-vmstat.pgfree 2874230 -17.2% 2379822 netperf.ThroughputBoth_total_tps 7484 -17.2% 6197 netperf.ThroughputBoth_tps 2874230 -17.2% 2379822 netperf.Throughput_total_tps 7484 -17.2% 6197 netperf.Throughput_tps 1.351e+09 -13.7% 1.165e+09 netperf.time.involuntary_context_switches 9145 +7.8% 9855 netperf.time.percent_of_cpu_this_job_got 27055 +8.4% 29322 netperf.time.system_time 927.87 -11.1% 824.49 netperf.time.user_time 1.975e+08 ± 5% -28.2% 1.418e+08 ± 6% netperf.time.voluntary_context_switches 8.623e+08 -17.2% 7.139e+08 netperf.workload 7908218 ± 8% +33.3% 10540980 ± 7% sched_debug.cfs_rq:/.avg_vruntime.stddev 2.27 -10.2% 2.04 sched_debug.cfs_rq:/.h_nr_queued.avg 11.92 ± 7% -18.9% 9.67 ± 8% sched_debug.cfs_rq:/.h_nr_queued.max 2.33 ± 5% -13.6% 2.02 ± 4% sched_debug.cfs_rq:/.h_nr_queued.stddev 5.14 ± 27% -50.8% 2.53 ± 51% sched_debug.cfs_rq:/.load_avg.min 7908224 ± 8% +33.3% 10540996 ± 7% sched_debug.cfs_rq:/.min_vruntime.stddev 245718 ± 4% -10.4% 220184 ± 8% sched_debug.cpu.max_idle_balance_cost.stddev 2.26 -10.2% 2.03 sched_debug.cpu.nr_running.avg 2.33 ± 5% -13.8% 2.01 ± 4% sched_debug.cpu.nr_running.stddev 8021905 -16.0% 6738879 sched_debug.cpu.nr_switches.avg 10163286 -20.5% 8082726 ± 2% sched_debug.cpu.nr_switches.max 1494738 ± 14% -50.1% 745542 ± 9% sched_debug.cpu.nr_switches.stddev 6.417e+10 -16.1% 5.383e+10 perf-stat.i.branch-instructions 0.52 -0.0 0.49 perf-stat.i.branch-miss-rate% 3.329e+08 -21.1% 2.628e+08 perf-stat.i.branch-misses 49601635 ± 8% -15.1% 42090142 ± 6% perf-stat.i.cache-misses 2.238e+08 -11.6% 1.979e+08 ± 2% perf-stat.i.cache-references 10160912 -15.7% 8567209 perf-stat.i.context-switches 1.74 +20.0% 2.09 perf-stat.i.cpi 2679 ± 7% -22.9% 2067 ± 3% perf-stat.i.cpu-migrations 12544 ± 7% +17.2% 14707 ± 5% perf-stat.i.cycles-between-cache-misses 3.464e+11 -16.3% 2.898e+11 perf-stat.i.instructions 0.58 -16.4% 0.49 perf-stat.i.ipc 52.92 -15.7% 44.62 perf-stat.i.metric.K/sec 0.52 -0.0 0.49 perf-stat.overall.branch-miss-rate% 1.74 +19.4% 2.07 perf-stat.overall.cpi 12209 ± 8% +17.3% 14320 ± 6% perf-stat.overall.cycles-between-cache-misses 0.58 -16.3% 0.48 perf-stat.overall.ipc 122980 +1.1% 124361 perf-stat.overall.path-length 6.398e+10 -16.1% 5.367e+10 perf-stat.ps.branch-instructions 3.319e+08 -21.1% 2.62e+08 perf-stat.ps.branch-misses 49465671 ± 8% -15.1% 41971976 ± 6% perf-stat.ps.cache-misses 2.231e+08 -11.6% 1.973e+08 ± 2% perf-stat.ps.cache-references 10129507 -15.7% 8540638 perf-stat.ps.context-switches 2669 ± 7% -22.8% 2061 ± 3% perf-stat.ps.cpu-migrations 3.454e+11 -16.3% 2.89e+11 perf-stat.ps.instructions 1.06e+14 -16.3% 8.879e+13 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