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: 36ba6dfe5b088b1d32bba592eb762853c1fa4f9c ("mm: ovl: copy-up on MAP_SHARED") https://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git overlayfs-rorw in testcase: phoronix-test-suite on test machine: 16 threads Nehalem-EP with 5G memory with following parameters: need_x: true test: gluxmark-1.1.1 cpufreq_governor: performance test-description: The Phoronix Test Suite is the most comprehensive testing and benchmarking platform available that provides an extensible framework for which new tests can be easily added. test-url: http://www.phoronix-test-suite.com/ 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: phoronix-test-suite/true-gluxmark-1.1.1-performance/lkp-ne02 1dab6cb64b34a86f 36ba6dfe5b088b1d32bba592eb ---------------- -------------------------- 46330 -35% 29946 phoronix-test-suite.time.file_system_inputs 1412 -48% 738 ± 3% vmstat.io.bi 0.05 ± 5% 9% 0.05 ± 6% perf-stat.iTLB-load-miss-rate% 1.542e+08 -5% 1.472e+08 perf-stat.branch-misses 159 -69% 50 perf-stat.major-faults 0 2e+04 24494 ± 37% latency_stats.max.wait_on_page_bit_killable.generic_file_read_iter.generic_file_splice_read.do_splice_to.splice_direct_to_actor.do_splice_direct.ovl_copy_up_one.[overlay].ovl_copy_up.[overlay].ovl_open_maybe_copy_up.[overlay].ovl_d_real.[overlay].vm_mmap_pgoff.SyS_mmap_pgoff 9668 ± 37% -1e+04 0 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.generic_perform_write.__generic_file_write_iter.generic_file_write_iter.__vfs_write 165877 ± 52% -1e+05 39034 ± 11% 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 0 1e+05 131652 ± 4% latency_stats.sum.wait_on_page_bit_killable.generic_file_read_iter.generic_file_splice_read.do_splice_to.splice_direct_to_actor.do_splice_direct.ovl_copy_up_one.[overlay].ovl_copy_up.[overlay].ovl_open_maybe_copy_up.[overlay].ovl_d_real.[overlay].vm_mmap_pgoff.SyS_mmap_pgoff 11512 ± 28% -1e+04 0 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.generic_perform_write.__generic_file_write_iter.generic_file_write_iter.__vfs_write 738087 ± 12% -5e+05 233491 ± 5% 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 perf-stat.major-faults 180 ++--------------------------------------------------------------------+ *.* .*. **. **. .*. .* 160 ++ *.*.*.** **.*.**.* : *.**.* ** : *.*.** **.*.** *.** | 140 ++ : : : :: : : : | | : : : :: : : : | 120 ++ : : : : : : : : | 100 ++ : : : : : : : : | | : : : : : : : : | 80 ++ : : : : : : : : | 60 ++ : : : : : : : : | O OO O O O O O O OO O:O:OO O OO O:O:OO:O:OO O O OO:O:OO | 40 ++ : :: : :: | 20 ++ : : : : | | * : * : | 0 ++--------O---O---------------------*----------------*----------------+ phoronix-test-suite.time.file_system_inputs 50000 ++------------------------------------------------------------------+ 45000 *+**.*.**.*.**.*.**.*.* *.**.*.** *.* *.*.**.*.* *.**.*.**.*.**.* | : : : : : : : : | 40000 ++ : : : : : : : : | 35000 ++ : : : : : : : : | | : : : : : : : : | 30000 O+OO O OO O O OO O OO:O OO O OO:OO O:OO O OO O OO:O O | 25000 ++ :: : : :: : : | 20000 ++ :: :: :: :: | | :: :: :: :: | 15000 ++ : :: : :: | 10000 ++ : : : : | | * : * : | 5000 ++ : : | 0 ++--------O--O---------------------*---------------*----------------+ vmstat.io.bi 1600 ++-------------------------------------------------------------------+ |.* .*.**.*.* .**. .* .* .*. .* 1400 *+ * *.*.* * .*.**.*.* * : .**.*.** * *.*.** ** | 1200 ++ : * : : : * : : | | : : : : : : : : | 1000 ++ : : : : : : : : | | : : : : : : : : | 800 O+ O O O:OO O O : : O:: O O: :O O | | O OO O O O O :: OO OO:O O:O O O O :O: | 600 ++ O :: :: :: : : | 400 ++ : :: : : : | | : :: : :: | 200 ++ * : * : | | : : | 0 ++--------O--O---------------------*----------------*----------------+ [*] 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