hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/ICH7AS CVE: NA -------------------------------- This patch adds a new DAMON access tracking mechanism using ARM Statistical Profiling Extension (SPE). By parsing memory access samples from SPE, DAMON can infer access patterns with low overhead and higher precision on supported ARM platforms. Signed-off-by: Ze Zuo <zuoze1@huawei.com> --- changes since v1: -- fix bugzilla issues. include/trace/events/kmem.h | 21 +++++++++++++++++++++ mm/mem_sampling.c | 1 + 2 files changed, 22 insertions(+) diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h index 28b9679c474d..3e78e6bd6e18 100644 --- a/include/trace/events/kmem.h +++ b/include/trace/events/kmem.h @@ -523,6 +523,27 @@ TRACE_EVENT(mm_mem_sampling_access_record, __entry->cpuid, __entry->pid) ); #endif /* CONFIG_NUMABALANCING_MEM_SAMPLING */ + +#ifdef CONFIG_DAMON_MEM_SAMPLING +TRACE_EVENT(mm_mem_sampling_damon_record, + + TP_PROTO(u64 vaddr, int pid), + + TP_ARGS(vaddr, pid), + + TP_STRUCT__entry( + __field(u64, vaddr) + __field(int, pid) + ), + + TP_fast_assign( + __entry->vaddr = vaddr; + __entry->pid = pid; + ), + + TP_printk("vaddr=%llx pid=%d", __entry->vaddr, __entry->pid) +); +#endif /* CONFIG_DAMON_MEM_SAMPLING */ #endif /* _TRACE_KMEM_H */ /* This part must be outside protection */ diff --git a/mm/mem_sampling.c b/mm/mem_sampling.c index 9ee68e15d1f6..8d79e83e64f0 100644 --- a/mm/mem_sampling.c +++ b/mm/mem_sampling.c @@ -316,6 +316,7 @@ static void damon_mem_sampling_record_cb(struct mem_sampling_record *record) mmput(mm); domon_record.vaddr = record->virt_addr; + trace_mm_mem_sampling_damon_record(record->virt_addr, (pid_t)record->context_id); /* only the proc under monitor now has damon_fifo */ if (damon_fifo) { -- 2.25.1