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X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: CEFfKGRbF8fJ6kvIs2gPUI6PjL3Yx6H/QzrohNqmjZzuhfAn1BqsNr/D4iE5hElmMVxxcqTMoT6V7vAi016HbQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO1PR11MB4915 X-OriginatorOrg: intel.com Hello, kernel test robot noticed a 6.1% improvement of stress-ng.sockfd.ops_per_sec on: commit: 284922f4c563aa3a8558a00f2a05722133237fe8 ("x86: uaccess: don't use runtime-const rewriting in modules") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master testcase: stress-ng config: x86_64-rhel-9.4 compiler: gcc-14 test machine: 224 threads 2 sockets Intel(R) Xeon(R) Platinum 8480CTDX (Sapphire Rapids) with 256G memory parameters: nr_threads: 100% testtime: 60s test: sockfd cpufreq_governor: performance Details are as below: --------------------------------------------------------------------------------------------------> The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20251128/202511281306.51105b46-lkp@intel.com ========================================================================================= compiler/cpufreq_governor/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime: gcc-14/performance/x86_64-rhel-9.4/100%/debian-13-x86_64-20250902.cgz/lkp-spr-r02/sockfd/stress-ng/60s commit: 17d85f33a8 ("Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma") 284922f4c5 ("x86: uaccess: don't use runtime-const rewriting in modules") 17d85f33a83b84e7 284922f4c563aa3a8558a00f2a0 ---------------- --------------------------- %stddev %change %stddev \ | \ 55674763 +6.1% 59075135 stress-ng.sockfd.ops 927326 +6.1% 983845 stress-ng.sockfd.ops_per_sec 3555 ± 3% +10.6% 3932 ± 3% perf-c2c.DRAM.remote 4834 ± 3% +12.0% 5415 ± 3% perf-c2c.HITM.local 2714 ± 2% +12.5% 3054 ± 3% perf-c2c.HITM.remote 0.51 +3.9% 0.53 perf-stat.i.MPKI 34903541 +5.2% 36715161 perf-stat.i.cache-misses 1.072e+08 +5.8% 1.133e+08 perf-stat.i.cache-references 18971 -5.5% 17932 perf-stat.i.cycles-between-cache-misses 0.46 ± 30% +13.6% 0.52 perf-stat.overall.MPKI 31330827 ± 30% +14.9% 36004895 perf-stat.ps.cache-misses 96530576 ± 30% +15.3% 1.113e+08 perf-stat.ps.cache-references 48.32 -0.2 48.16 perf-profile.calltrace.cycles-pp._raw_spin_lock.unix_del_edges.unix_stream_read_generic.unix_stream_recvmsg.sock_recvmsg 48.23 -0.2 48.07 perf-profile.calltrace.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock.unix_del_edges.unix_stream_read_generic.unix_stream_recvmsg 48.34 -0.2 48.18 perf-profile.calltrace.cycles-pp.unix_del_edges.unix_stream_read_generic.unix_stream_recvmsg.sock_recvmsg.____sys_recvmsg 0.56 ± 4% +0.1 0.65 ± 9% perf-profile.calltrace.cycles-pp.path_openat.do_filp_open.do_sys_openat2.__x64_sys_openat.do_syscall_64 0.62 ± 3% +0.1 0.71 ± 8% perf-profile.calltrace.cycles-pp.do_sys_openat2.__x64_sys_openat.do_syscall_64.entry_SYSCALL_64_after_hwframe.stress_sockfd 0.56 ± 3% +0.1 0.65 ± 8% perf-profile.calltrace.cycles-pp.do_filp_open.do_sys_openat2.__x64_sys_openat.do_syscall_64.entry_SYSCALL_64_after_hwframe 48.34 -0.2 48.18 perf-profile.children.cycles-pp.unix_del_edges 0.15 ± 3% +0.0 0.17 ± 2% perf-profile.children.cycles-pp.__scm_recv_common 0.08 ± 7% +0.0 0.10 ± 7% perf-profile.children.cycles-pp.lockref_put_return 0.09 ± 5% +0.0 0.11 ± 6% perf-profile.children.cycles-pp.__fput 0.35 ± 5% +0.1 0.43 ± 12% perf-profile.children.cycles-pp.do_open 0.63 ± 3% +0.1 0.72 ± 8% perf-profile.children.cycles-pp.do_sys_openat2 0.56 ± 3% +0.1 0.65 ± 8% perf-profile.children.cycles-pp.do_filp_open 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. -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki