FYI, we noticed the below changes on https://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-pkeys.git pkeys-v005-protsyscalls commit 2205cb3c40c2ba6521427c9f8f36b2d4f2f2a98d ("x86, pkeys: arch-specific protection bits") ========================================================================================= tbox_group/testcase/rootfs/kconfig/compiler/cpufreq_governor/test: lkp-xbm/will-it-scale/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/performance/pread1 commit: d1d70274836b555fdc790a4957ce5ca24b427bf4 2205cb3c40c2ba6521427c9f8f36b2d4f2f2a98d d1d70274836b555f 2205cb3c40c2ba6521427c9f8f ---------------- -------------------------- %stddev %change %stddev \ | \ 1440317 ± 0% +22.4% 1762590 ± 0% will-it-scale.per_thread_ops 313.14 ± 0% -2.1% 306.57 ± 0% will-it-scale.time.system_time 27.99 ± 0% +24.0% 34.71 ± 0% will-it-scale.time.user_time 13.25 ± 20% -50.9% 6.50 ± 41% cpuidle.POLL.usage 27.99 ± 0% +24.0% 34.71 ± 0% time.user_time 1965 ± 0% -19.1% 1590 ± 3% vmstat.system.cs 37.50 ± 4% -24.0% 28.50 ± 9% sched_debug.cfs_rq[0]:/.nr_spread_over 144.50 ± 6% -17.8% 118.75 ± 9% sched_debug.cfs_rq[1]:/.load_avg 145.50 ± 6% -18.6% 118.50 ± 9% sched_debug.cfs_rq[1]:/.tg_load_avg_contrib lkp-xbm: Sandy Bridge Memory: 2G will-it-scale.per_thread_ops 1.8e+06 ++------------O-O--O--O-O-----O--O---------O-----O-O--O----------+ O O O O O O O O O O O O O 1.75e+06 ++ O | | | 1.7e+06 ++ | 1.65e+06 ++ | | | 1.6e+06 ++ | | | 1.55e+06 ++ | 1.5e+06 ++ | | *..*.. | 1.45e+06 ++ .. .* | *..*.*..*..*..*.*..*..*.* *.*..*..*.*..*..*.*..*. | 1.4e+06 ++---------------------------------------------------------------+ will-it-scale.time.user_time 36 ++---------------------------------------------------------------------+ | O O O | 35 ++ O O O O O O O O O O O O O O O 34 ++ O O O | O O O | 33 ++ O | 32 ++ | | | 31 ++ | 30 ++ | | | 29 ++ *..*.. | 28 ++ .. .* | *..*.. .*..*..*.. .* *.*..*..*..*..*..*..*..*. | 27 ++----*-----------*--*--*----------------------------------------------+ will-it-scale.time.system_time 315 ++--------------------------------------------------------------------+ 314 ++ .*.. .*.*..*.. | *..*. *..*..*. *.. *..*.. .*..*..*..*. .*.. | 313 ++ *.. .. *. *. * | 312 ++ * | | | 311 ++ | 310 ++ | 309 ++ | | O | 308 O+ O O | 307 ++ O O O O O O | | O O O O O O O O O O O O O 306 ++ O O | 305 ++--------------------------------------------------------------------+ time.user_time 36 ++---------------------------------------------------------------------+ | O O O | 35 ++ O O O O O O O O O O O O O O O 34 ++ O O O | O O O | 33 ++ O | 32 ++ | | | 31 ++ | 30 ++ | | | 29 ++ *..*.. | 28 ++ .. .* | *..*.. .*..*..*.. .* *.*..*..*..*..*..*..*..*. | 27 ++----*-----------*--*--*----------------------------------------------+ [*] bisect-good sample [O] bisect-bad sample 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 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, Ying Huang