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X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Hello, kernel test robot noticed a 7.7% improvement of will-it-scale.per_thread_op= s on: commit: a96ef5848cb096226bf6aff31a90d8b136d99b71 ("randomize_kstack: Unify = random source across arches") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master testcase: will-it-scale config: x86_64-rhel-9.4 compiler: gcc-14 test machine: 192 threads 2 sockets Intel(R) Xeon(R) 6740E CPU @ 2.4GHz (S= ierra Forest) with 256G memory parameters: nr_task: 100% mode: thread test: lseek1 cpufreq_governor: performance In addition to that, the commit also has significant impact on the followin= g tests: +------------------+-------------------------------------------------------= -------+ | testcase: change | will-it-scale: will-it-scale.per_thread_ops 4.7% impro= vement | | test parameters | cpufreq_governor=3Dperformance = | | | mode=3Dthread = | | | nr_task=3D100% = | | | test=3Dgetppid1 = | +------------------+-------------------------------------------------------= -------+ Details are as below: ---------------------------------------------------------------------------= -----------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20260331/202603311659.6aa92f2c-lkp@= intel.com =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 compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testc= ase: gcc-14/performance/x86_64-rhel-9.4/thread/100%/debian-13-x86_64-20250902.= cgz/lkp-srf-2sp2/lseek1/will-it-scale commit: = 37beb42560 ("randomize_kstack: Maintain kstack_offset per task") a96ef5848c ("randomize_kstack: Unify random source across arches") 37beb42560165869 a96ef5848cb096226bf6aff31a9 = ---------------- --------------------------- = %stddev %change %stddev \ | \ = 1.474e+09 +7.7% 1.588e+09 will-it-scale.192.threads 7675604 +7.7% 8270154 will-it-scale.per_thread_ops 1.474e+09 +7.7% 1.588e+09 will-it-scale.workload 37.77 -16.4% 31.57 vmstat.cpu.us 60.95 +6.2 67.17 mpstat.cpu.all.sys% 38.17 -6.3 31.90 mpstat.cpu.all.usr% 0.96 +17.7% 1.13 turbostat.IPC 442.92 +3.6% 459.07 turbostat.PkgWatt 0.01 =B1 22% -28.9% 0.01 =B1 20% perf-stat.i.MPKI 1.295e+11 +11.4% 1.442e+11 perf-stat.i.branch-instructio= ns 7450278 =B1 77% +144.3% 18200516 =B1 35% perf-stat.i.branch-misses 4646936 =B1 5% -10.0% 4180940 =B1 5% perf-stat.i.cache-referen= ces 1.04 -15.2% 0.88 perf-stat.i.cpi 5.856e+11 +18.0% 6.907e+11 perf-stat.i.instructions 0.96 +18.0% 1.13 perf-stat.i.ipc 0.00 =B1 3% -15.2% 0.00 =B1 2% perf-stat.overall.MPKI 0.01 =B1 77% +0.0 0.01 =B1 35% perf-stat.overall.branch-= miss-rate% 10.98 =B1 5% +1.3 12.24 =B1 5% perf-stat.overall.cache-m= iss-rate% 1.04 -15.3% 0.88 perf-stat.overall.cpi 0.96 +18.0% 1.13 perf-stat.overall.ipc 119899 +9.5% 131347 perf-stat.overall.path-length 1.29e+11 +11.4% 1.437e+11 perf-stat.ps.branch-instructi= ons 7425104 =B1 77% +144.1% 18126281 =B1 35% perf-stat.ps.branch-misses 4734855 =B1 5% -10.3% 4248990 =B1 5% perf-stat.ps.cache-refere= nces 5.837e+11 +18.0% 6.885e+11 perf-stat.ps.instructions 1.767e+14 +18.0% 2.086e+14 perf-stat.total.instructions 8.77 =B1 2% -8.8 0.00 perf-profile.calltrace.cycl= es-pp.arch_exit_to_user_mode_prepare.do_syscall_64.entry_SYSCALL_64_after_h= wframe.llseek 39.72 -8.2 31.51 =B1 5% perf-profile.calltrace.cycl= es-pp.do_syscall_64.entry_SYSCALL_64_after_hwframe.llseek 42.72 -8.0 34.73 =B1 5% perf-profile.calltrace.cycl= es-pp.entry_SYSCALL_64_after_hwframe.llseek 26.12 -2.5 23.64 =B1 4% perf-profile.calltrace.cycl= es-pp.__x64_sys_lseek.do_syscall_64.entry_SYSCALL_64_after_hwframe.llseek 13.12 =B1 3% -1.7 11.38 =B1 6% perf-profile.calltrace.cy= cles-pp.fdget_pos.__x64_sys_lseek.do_syscall_64.entry_SYSCALL_64_after_hwfr= ame.llseek 7.17 =B1 3% -1.4 5.74 =B1 7% perf-profile.calltrace.cy= cles-pp.__fget_files.fdget_pos.__x64_sys_lseek.do_syscall_64.entry_SYSCALL_= 64_after_hwframe 4.86 -0.3 4.53 =B1 4% perf-profile.calltrace.cycl= es-pp.mutex_unlock.__x64_sys_lseek.do_syscall_64.entry_SYSCALL_64_after_hwf= rame.llseek 1.39 +0.3 1.68 =B1 7% perf-profile.calltrace.cycl= es-pp.lseek@plt 2.48 =B1 2% +0.5 3.02 =B1 8% perf-profile.calltrace.cy= cles-pp.testcase 1.20 =B1 5% +1.2 2.39 =B1 8% perf-profile.calltrace.cy= cles-pp.x64_sys_call.do_syscall_64.entry_SYSCALL_64_after_hwframe.llseek 0.00 +1.4 1.40 =B1 8% perf-profile.calltrace.cycl= es-pp.prandom_u32_state.do_syscall_64.entry_SYSCALL_64_after_hwframe.llseek 39.88 +7.5 47.39 =B1 4% perf-profile.calltrace.cycl= es-pp.entry_SYSCALL_64.llseek 8.77 =B1 2% -8.5 0.29 =B1 5% perf-profile.children.cyc= les-pp.arch_exit_to_user_mode_prepare 39.86 -8.2 31.69 =B1 5% perf-profile.children.cycle= s-pp.do_syscall_64 42.77 -8.0 34.78 =B1 5% perf-profile.children.cycle= s-pp.entry_SYSCALL_64_after_hwframe 26.26 -2.4 23.83 =B1 4% perf-profile.children.cycle= s-pp.__x64_sys_lseek 13.22 =B1 3% -1.8 11.44 =B1 6% perf-profile.children.cyc= les-pp.fdget_pos 7.24 =B1 3% -1.4 5.79 =B1 7% perf-profile.children.cyc= les-pp.__fget_files 98.29 -0.4 97.92 perf-profile.children.cycles-= pp.llseek 4.92 -0.3 4.59 =B1 4% perf-profile.children.cycle= s-pp.mutex_unlock 0.20 =B1 2% -0.0 0.18 =B1 2% perf-profile.children.cyc= les-pp.asm_sysvec_apic_timer_interrupt 0.19 -0.0 0.16 =B1 2% perf-profile.children.cycle= s-pp.sysvec_apic_timer_interrupt 0.18 -0.0 0.15 =B1 3% perf-profile.children.cycle= s-pp.hrtimer_interrupt 0.18 =B1 2% -0.0 0.16 =B1 2% perf-profile.children.cyc= les-pp.__sysvec_apic_timer_interrupt 0.10 =B1 3% -0.0 0.08 =B1 4% perf-profile.children.cyc= les-pp.__hrtimer_run_queues 0.10 -0.0 0.08 =B1 4% perf-profile.children.cycle= s-pp.tick_nohz_handler 0.08 -0.0 0.06 =B1 7% perf-profile.children.cycle= s-pp.update_process_times 0.76 =B1 2% +0.2 0.92 =B1 7% perf-profile.children.cyc= les-pp.lseek@plt 2.43 =B1 2% +0.5 2.95 =B1 8% perf-profile.children.cyc= les-pp.testcase 1.22 =B1 4% +1.2 2.45 =B1 8% perf-profile.children.cyc= les-pp.x64_sys_call 0.00 +1.4 1.40 =B1 8% perf-profile.children.cycle= s-pp.prandom_u32_state 26.94 +4.7 31.60 =B1 4% perf-profile.children.cycle= s-pp.entry_SYSCALL_64 8.72 =B1 2% -8.5 0.23 =B1 5% perf-profile.self.cycles-= pp.arch_exit_to_user_mode_prepare 7.18 =B1 3% -1.4 5.78 =B1 7% perf-profile.self.cycles-= pp.__fget_files 4.84 -0.3 4.52 =B1 4% perf-profile.self.cycles-pp= .mutex_unlock 1.07 =B1 3% -0.1 0.94 =B1 7% perf-profile.self.cycles-= pp.fdget_pos 0.06 =B1 7% +0.0 0.08 =B1 10% perf-profile.self.cycles-= pp.lseek@plt 3.62 +0.2 3.83 =B1 4% perf-profile.self.cycles-pp= .do_syscall_64 1.68 =B1 2% +0.4 2.05 =B1 8% perf-profile.self.cycles-= pp.testcase 1.16 =B1 5% +1.3 2.41 =B1 8% perf-profile.self.cycles-= pp.x64_sys_call 0.00 +1.3 1.33 =B1 8% perf-profile.self.cycles-pp= .prandom_u32_state 13.18 =B1 2% +1.7 14.89 =B1 6% perf-profile.self.cycles-= pp.entry_SYSCALL_64 18.28 +3.9 22.16 =B1 5% perf-profile.self.cycles-pp= .llseek ***************************************************************************= ************************ =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 compiler/cpufreq_governor/kconfig/mode/nr_task/rootfs/tbox_group/test/testc= ase: gcc-14/performance/x86_64-rhel-9.4/thread/100%/debian-13-x86_64-20250902.= cgz/lkp-srf-2sp2/getppid1/will-it-scale commit: = 37beb42560 ("randomize_kstack: Maintain kstack_offset per task") a96ef5848c ("randomize_kstack: Unify random source across arches") 37beb42560165869 a96ef5848cb096226bf6aff31a9 = ---------------- --------------------------- = %stddev %change %stddev \ | \ = 1.987e+09 +4.7% 2.079e+09 will-it-scale.192.threads 10346487 +4.7% 10828131 will-it-scale.per_thread_ops 1.987e+09 +4.7% 2.079e+09 will-it-scale.workload 0.79 +20.3% 0.95 turbostat.IPC 53.28 +3.8 57.11 mpstat.cpu.all.sys% 45.85 -3.8 42.01 mpstat.cpu.all.usr% 1.111e+11 +10.2% 1.225e+11 perf-stat.i.branch-instructio= ns 4803948 =B1 2% +9.6% 5267473 =B1 5% perf-stat.i.cache-referen= ces 1.27 -17.3% 1.05 perf-stat.i.cpi 4.821e+11 +21.0% 5.833e+11 perf-stat.i.instructions 0.79 +20.9% 0.95 perf-stat.i.ipc 0.00 =B1 4% -18.4% 0.00 =B1 3% perf-stat.overall.MPKI 0.01 =B1 60% -0.0 0.00 perf-stat.overall.branch-mi= ss-rate% 1.27 -17.3% 1.05 perf-stat.overall.cpi 0.79 +21.0% 0.95 perf-stat.overall.ipc 73248 +15.6% 84666 perf-stat.overall.path-length 1.107e+11 +10.2% 1.221e+11 perf-stat.ps.branch-instructi= ons 4903095 =B1 2% +9.2% 5356604 =B1 4% perf-stat.ps.cache-refere= nces 4.806e+11 +21.0% 5.814e+11 perf-stat.ps.instructions 1.455e+14 +21.0% 1.76e+14 perf-stat.total.instructions 4.78 =B1 16% -2.7 2.06 =B1 5% perf-profile.calltrace.cy= cles-pp.syscall_return_via_sysret.getppid 5.09 =B1 9% -2.5 2.58 =B1 10% perf-profile.calltrace.cy= cles-pp.__task_pid_nr_ns.__x64_sys_getppid.do_syscall_64.entry_SYSCALL_64_a= fter_hwframe.getppid 5.69 =B1 8% -2.5 3.18 =B1 10% perf-profile.calltrace.cy= cles-pp.__x64_sys_getppid.do_syscall_64.entry_SYSCALL_64_after_hwframe.getp= pid 6.88 =B1 3% -2.2 4.72 =B1 16% perf-profile.calltrace.cy= cles-pp.entry_SYSCALL_64_safe_stack.getppid 1.36 =B1 2% +1.0 2.38 =B1 13% perf-profile.calltrace.cy= cles-pp.x64_sys_call.do_syscall_64.entry_SYSCALL_64_after_hwframe.getppid 0.00 +1.5 1.50 =B1 15% perf-profile.calltrace.cycl= es-pp.getppid@plt 0.00 +1.9 1.88 =B1 14% perf-profile.calltrace.cycl= es-pp.prandom_u32_state.do_syscall_64.entry_SYSCALL_64_after_hwframe.getppid 5.46 =B1 17% +2.1 7.56 =B1 5% perf-profile.calltrace.cy= cles-pp.entry_SYSRETQ_unsafe_stack.getppid 10.78 =B1 5% +3.8 14.62 =B1 10% perf-profile.calltrace.cy= cles-pp.testcase 44.13 =B1 7% -5.9 38.20 =B1 5% perf-profile.children.cyc= les-pp.entry_SYSCALL_64 4.84 =B1 16% -2.7 2.16 =B1 6% perf-profile.children.cyc= les-pp.syscall_return_via_sysret 5.85 =B1 9% -2.6 3.28 =B1 11% perf-profile.children.cyc= les-pp.__x64_sys_getppid 5.17 =B1 9% -2.5 2.64 =B1 11% perf-profile.children.cyc= les-pp.__task_pid_nr_ns 6.04 =B1 3% -1.8 4.22 =B1 15% perf-profile.children.cyc= les-pp.entry_SYSCALL_64_safe_stack 2.12 =B1 10% -1.7 0.38 =B1 12% perf-profile.children.cyc= les-pp.arch_exit_to_user_mode_prepare 98.57 -0.6 97.99 perf-profile.children.cycles-= pp.getppid 0.51 =B1 7% +0.3 0.83 =B1 14% perf-profile.children.cyc= les-pp.getppid@plt 1.44 =B1 2% +1.0 2.42 =B1 13% perf-profile.children.cyc= les-pp.x64_sys_call 0.00 +1.9 1.88 =B1 14% perf-profile.children.cycle= s-pp.prandom_u32_state 6.32 =B1 5% +2.4 8.68 =B1 11% perf-profile.children.cyc= les-pp.testcase 20.95 =B1 9% +10.1 31.04 =B1 9% perf-profile.children.cyc= les-pp.entry_SYSRETQ_unsafe_stack 23.16 =B1 6% -7.0 16.11 =B1 16% perf-profile.self.cycles-= pp.entry_SYSCALL_64 4.79 =B1 16% -2.6 2.16 =B1 6% perf-profile.self.cycles-= pp.syscall_return_via_sysret 5.09 =B1 9% -2.5 2.60 =B1 11% perf-profile.self.cycles-= pp.__task_pid_nr_ns 2.04 =B1 10% -1.7 0.33 =B1 7% perf-profile.self.cycles-= pp.arch_exit_to_user_mode_prepare 4.56 =B1 3% -1.3 3.25 =B1 15% perf-profile.self.cycles-= pp.entry_SYSCALL_64_safe_stack 4.30 =B1 2% -1.1 3.19 =B1 15% perf-profile.self.cycles-= pp.entry_SYSCALL_64_after_hwframe 1.40 =B1 7% +0.6 1.98 =B1 12% perf-profile.self.cycles-= pp.testcase 1.35 =B1 2% +1.0 2.35 =B1 13% perf-profile.self.cycles-= pp.x64_sys_call 0.00 +1.7 1.68 =B1 15% perf-profile.self.cycles-pp= .prandom_u32_state 20.89 =B1 9% +10.1 30.94 =B1 10% perf-profile.self.cycles-= pp.entry_SYSRETQ_unsafe_stack Disclaimer: Results have been estimated based on internal Intel analysis and are provid= ed for informational purposes only. Any difference in system hardware or softw= are design or configuration may affect actual performance. -- = 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv