Greeting, FYI, we noticed a -4.0% regression of will-it-scale.per_thread_ops due to commit: commit: c7299fea67696db5bd09d924d1f1080d894f92ef ("spi: Fix spi device unregister flow") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master in testcase: will-it-scale on test machine: 88 threads 2 sockets Intel(R) Xeon(R) Gold 6238M CPU @ 2.10GHz with 128G memory with following parameters: nr_task: 100% mode: thread test: getppid1 cpufreq_governor: performance ucode: 0x5003006 test-description: Will It Scale takes a testcase and runs it from 1 through to n parallel copies to see if the testcase will scale. It builds both a process and threads based test in order to see any differences between the two. test-url: https://github.com/antonblanchard/will-it-scale If you fix the issue, kindly add following tag Reported-by: kernel test robot <oliver.sang(a)intel.com&gt; Details are as below: --------------------------------------------------------------------------------------------------> To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests 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 bin/lkp run generated-yaml-file ========================================================================================= compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testcase/ucode: gcc-9/performance/x86_64-rhel-8.3/thread/100%/debian-10.4-x86_64-20200603.cgz/lkp-csl-2sp9/getppid1/will-it-scale/0x5003006 commit: 86527bcbc8 ("spi: Rename enable1 to activate in spi_set_cs()") c7299fea67 ("spi: Fix spi device unregister flow") 86527bcbc88922ea c7299fea67696db5bd09d924d1f ---------------- --------------------------- %stddev %change %stddev \ | \ 7.592e+08 -4.0% 7.289e+08 will-it-scale.88.threads 8626955 -4.0% 8283121 will-it-scale.per_thread_ops 7.592e+08 -4.0% 7.289e+08 will-it-scale.workload 0.49 ± 66% -68.8% 0.15 ± 77% perf-sched.wait_time.avg.ms.wait_for_partner.fifo_open.do_dentry_open.do_open.isra 9743 ± 26% +52.0% 14808 ± 25% proc-vmstat.numa_hint_faults 3.948e+10 -4.0% 3.792e+10 perf-stat.i.branch-instructions 1.897e+08 -4.1% 1.819e+08 perf-stat.i.branch-misses 1.36 +4.0% 1.41 perf-stat.i.cpi 625971 ± 3% -10.0% 563208 ± 7% perf-stat.i.cycles-between-cache-misses 6.138e+10 -3.9% 5.897e+10 perf-stat.i.dTLB-loads 0.00 +0.0 0.00 perf-stat.i.dTLB-store-miss-rate% 4.243e+10 -3.9% 4.076e+10 perf-stat.i.dTLB-stores 1.785e+11 -4.0% 1.714e+11 perf-stat.i.instructions 871.41 ± 3% -8.4% 798.42 perf-stat.i.instructions-per-iTLB-miss 0.74 -3.8% 0.71 perf-stat.i.ipc 1628 -3.9% 1564 perf-stat.i.metric.M/sec 42181 ± 2% +5.0% 44291 perf-stat.i.node-store-misses 0.02 ± 3% +12.2% 0.02 ± 4% perf-stat.overall.MPKI 1.36 +4.0% 1.41 perf-stat.overall.cpi 0.00 +0.0 0.00 perf-stat.overall.dTLB-store-miss-rate% 867.19 ± 4% -8.3% 795.25 perf-stat.overall.instructions-per-iTLB-miss 0.74 -3.8% 0.71 perf-stat.overall.ipc 3.935e+10 -4.0% 3.779e+10 perf-stat.ps.branch-instructions 1.891e+08 -4.1% 1.813e+08 perf-stat.ps.branch-misses 6.117e+10 -3.9% 5.877e+10 perf-stat.ps.dTLB-loads 4.229e+10 -3.9% 4.062e+10 perf-stat.ps.dTLB-stores 1.779e+11 -4.0% 1.709e+11 perf-stat.ps.instructions 42047 ± 2% +5.0% 44151 perf-stat.ps.node-store-misses 5.372e+13 -3.9% 5.161e+13 perf-stat.total.instructions 44.46 -1.7 42.80 perf-profile.calltrace.cycles-pp.__entry_text_start.getppid 9.26 ± 3% -0.6 8.67 perf-profile.calltrace.cycles-pp.testcase 3.08 -0.2 2.90 perf-profile.calltrace.cycles-pp.syscall_enter_from_user_mode.do_syscall_64.entry_SYSCALL_64_after_hwframe.getppid 8.27 -0.2 8.09 perf-profile.calltrace.cycles-pp.syscall_return_via_sysret.getppid 3.11 -0.1 2.98 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_safe_stack.getppid 94.30 +0.4 94.74 perf-profile.calltrace.cycles-pp.getppid 1.59 ± 7% +0.5 2.04 ± 2% perf-profile.calltrace.cycles-pp.rcu_nocb_flush_deferred_wakeup.exit_to_user_mode_prepare.syscall_exit_to_user_mode.entry_SYSCALL_64_after_hwframe.getppid 1.66 ± 7% +1.1 2.81 ± 2% perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode_prepare.syscall_exit_to_user_mode.entry_SYSCALL_64_after_hwframe.getppid 5.75 ± 7% +1.8 7.50 perf-profile.calltrace.cycles-pp.exit_to_user_mode_prepare.syscall_exit_to_user_mode.entry_SYSCALL_64_after_hwframe.getppid 37.24 +2.4 39.59 perf-profile.calltrace.cycles-pp.entry_SYSCALL_64_after_hwframe.getppid 8.99 ± 5% +2.8 11.81 perf-profile.calltrace.cycles-pp.syscall_exit_to_user_mode.entry_SYSCALL_64_after_hwframe.getppid 28.71 -1.0 27.67 perf-profile.children.cycles-pp.__entry_text_start 24.10 -0.8 23.34 perf-profile.children.cycles-pp.syscall_return_via_sysret 5.51 ± 3% -0.4 5.14 ± 2% perf-profile.children.cycles-pp.testcase 3.12 -0.2 2.95 perf-profile.children.cycles-pp.syscall_enter_from_user_mode 3.32 -0.1 3.17 perf-profile.children.cycles-pp.entry_SYSCALL_64_safe_stack 0.88 -0.0 0.84 perf-profile.children.cycles-pp.getppid@plt 1.04 +0.1 1.11 perf-profile.children.cycles-pp.rcu_read_unlock_strict 1.66 ± 7% +0.5 2.12 perf-profile.children.cycles-pp.rcu_nocb_flush_deferred_wakeup 1.70 ± 7% +1.2 2.86 ± 2% perf-profile.children.cycles-pp.syscall_exit_to_user_mode_prepare 6.20 ± 6% +1.7 7.86 perf-profile.children.cycles-pp.exit_to_user_mode_prepare 37.86 +2.3 40.19 perf-profile.children.cycles-pp.entry_SYSCALL_64_after_hwframe 10.12 ± 5% +2.8 12.91 perf-profile.children.cycles-pp.syscall_exit_to_user_mode 20.01 -0.9 19.14 perf-profile.self.cycles-pp.getppid 23.90 -0.7 23.15 perf-profile.self.cycles-pp.syscall_return_via_sysret 9.11 -0.7 8.43 perf-profile.self.cycles-pp.entry_SYSCALL_64_after_hwframe 12.94 -0.4 12.53 perf-profile.self.cycles-pp.__entry_text_start 2.67 -0.2 2.52 perf-profile.self.cycles-pp.syscall_enter_from_user_mode 3.31 -0.1 3.16 perf-profile.self.cycles-pp.entry_SYSCALL_64_safe_stack 0.36 -0.0 0.34 perf-profile.self.cycles-pp.__x86_indirect_thunk_rax 0.71 ± 2% +0.0 0.76 ± 2% perf-profile.self.cycles-pp.rcu_read_unlock_strict 1.32 ± 9% +0.5 1.84 ± 2% perf-profile.self.cycles-pp.rcu_nocb_flush_deferred_wakeup 3.52 +0.5 4.07 perf-profile.self.cycles-pp.__x64_sys_getppid 4.49 ± 6% +1.2 5.64 perf-profile.self.cycles-pp.exit_to_user_mode_prepare 1.32 ± 9% +1.2 2.49 ± 3% perf-profile.self.cycles-pp.syscall_exit_to_user_mode_prepare will-it-scale.88.threads 7.45e+08 +----------------------------------------------------------------+ |.++.+. .++.+.+ | 7.4e+08 |-+ ++.+ +.+.+ | | | 7.35e+08 |-+ | | | 7.3e+08 |-+ O O O O O O O O OO | | O O O O O | 7.25e+08 |-+ O O O OO O O O O | | O O O | 7.2e+08 |-+ | | O | 7.15e+08 |-+O O OO O OO O OO | | | 7.1e+08 +----------------------------------------------------------------+ will-it-scale.per_thread_ops 8.45e+06 +----------------------------------------------------------------+ | + .+ +. .+ | 8.4e+06 |-+ + + | | | 8.35e+06 |-+ | | | 8.3e+06 |-+ O O O | | O OO OO O OO OO OO | 8.25e+06 |-+ | | O O O OO O OO O OO | 8.2e+06 |-+ O | | | 8.15e+06 |-O | | O O OO O OO O OO | 8.1e+06 +----------------------------------------------------------------+ will-it-scale.workload 7.45e+08 +----------------------------------------------------------------+ |.++.+. .++.+.+ | 7.4e+08 |-+ ++.+ +.+.+ | | | 7.35e+08 |-+ | | | 7.3e+08 |-+ O O O O O O O O OO | | O O O O O | 7.25e+08 |-+ O O O OO O O O O | | O O O | 7.2e+08 |-+ | | O | 7.15e+08 |-+O O OO O OO O OO | | | 7.1e+08 +----------------------------------------------------------------+ [*] bisect-good sample [O] bisect-bad sample 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. --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang