Greeting, There is no primary kpi change in this test, below is the data collected through multiple monitors running background just for your information. commit: 2c4951de4e3ffcb6d80b5f1751fb18c5b5087039 ("mm: workingset: update shadow limit to reflect bigger active list") https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master in testcase: vm-scalability on test machine: 88 threads Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz with 128G memory with following parameters: runtime: 300s test: lru-file-mmap-read-rand cpufreq_governor: performance test-description: The motivation behind this suite is to exercise functions and regions of the mm/ of the Linux kernel which are of interest to us. test-url: https://git.kernel.org/cgit/linux/kernel/git/wfg/vm-scalability.git/ Details are as below: --------------------------------------------------------------------------------------------------> To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml testcase/path_params/tbox_group/run: vm-scalability/300s-lru-file-mmap-read-rand-performance/lkp-bdw-ep2 7cd98e0d074d13e6 2c4951de4e3ffcb6d80b5f1751 ---------------- -------------------------- %stddev change %stddev \ | \ 350 5% 365 vm-scalability.time.elapsed_time 350 5% 365 vm-scalability.time.elapsed_time.max 637015 ± 7% -12% 562096 ± 3% vm-scalability.time.involuntary_context_switches 221 217 turbostat.PkgWatt 82.12 80.30 turbostat.RAMWatt 1.651e+10 ± 3% 8% 1.787e+10 perf-stat.branch-misses 0.36 5% 0.38 perf-stat.branch-miss-rate% 31.35 30.42 perf-stat.cache-miss-rate% 93762 ± 24% -44% 52115 ± 14% perf-stat.cpu-migrations 88916 ± 66% 5e+05 627178 ±118% latency_stats.avg.max 0 2e+05 182898 ±155% latency_stats.avg.nfs_wait_on_request.nfs_writepage_setup.nfs_updatepage.nfs_write_end.generic_perform_write.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath 73575 ±100% 1e+05 182026 ±103% latency_stats.avg.pipe_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath 0 2e+04 15135 ± 67% latency_stats.avg.perf_event_alloc.SYSC_perf_event_open.SyS_perf_event_open.entry_SYSCALL_64_fastpath 0 2e+05 182898 ±155% latency_stats.max.nfs_wait_on_request.nfs_writepage_setup.nfs_updatepage.nfs_write_end.generic_perform_write.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath 90239 ± 81% 1e+05 218149 ±122% latency_stats.max.wait_on_page_bit_killable.__lock_page_or_retry.filemap_fault.__do_fault.handle_mm_fault.__do_page_fault.do_page_fault.page_fault.clear_user.load_elf_binary.search_binary_handler.do_execveat_common 0 2e+04 15135 ± 67% latency_stats.max.perf_event_alloc.SYSC_perf_event_open.SyS_perf_event_open.entry_SYSCALL_64_fastpath 167679 ± 83% 3e+05 491463 ±112% latency_stats.sum.wait_on_page_bit_killable.__lock_page_or_retry.filemap_fault.__do_fault.handle_mm_fault.__do_page_fault.do_page_fault.page_fault.clear_user.load_elf_binary.search_binary_handler.do_execveat_common 0 2e+05 182898 ±155% latency_stats.sum.nfs_wait_on_request.nfs_writepage_setup.nfs_updatepage.nfs_write_end.generic_perform_write.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath 0 2e+04 15135 ± 67% latency_stats.sum.perf_event_alloc.SYSC_perf_event_open.SyS_perf_event_open.entry_SYSCALL_64_fastpath 17222 ± 57% -2e+04 0 latency_stats.sum.msleep_interruptible.uart_wait_until_sent.tty_wait_until_sent.tty_port_close_start.tty_port_close.uart_close.tty_release.__fput.____fput.task_work_run.exit_to_usermode_loop.syscall_return_slowpath 28920 ± 57% -3e+04 0 latency_stats.sum.tty_wait_until_sent.tty_port_close_start.tty_port_close.uart_close.tty_release.__fput.____fput.task_work_run.exit_to_usermode_loop.syscall_return_slowpath.entry_SYSCALL_64_fastpath vm-scalability.time.elapsed_time 375 ++--------------------------------------------------------------------+ | | 370 ++O | O O O O O | | O O O O O O O O OO | 365 ++ O O O | | | 360 ++ | | | 355 ++ | | | | *. | 350 ++ *. *. * : **.* *.* + **. *.*.**.*. *.*. .* .*.**.*. : *.**. + *.*.**.*.* : | 345 ++-*------*-*---------*----**-*--*--------*-------*------------*------+ vm-scalability.time.elapsed_time.max 375 ++--------------------------------------------------------------------+ | | 370 ++O | O O O O O | | O O O O O O O O OO | 365 ++ O O O | | | 360 ++ | | | 355 ++ | | | | *. | 350 ++ *. *. * : **.* *.* + **. *.*.**.*. *.*. .* .*.**.*. : *.**. + *.*.**.*.* : | 345 ++-*------*-*---------*----**-*--*--------*-------*------------*------+ [*] 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. Thanks, Xiaolong