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b=XueNJUqJZxVOF0+nCu81W73Mun0zKB4VqEyoU8g4s5CAtrjiTruK9zvTirpu4L8cJ jBBt/Evy/xW27IQjHPwK49MHrkWVWLb+jkvgXH/bdIK9UON6ceLjLnrjG0X6QUKxdD PmLFt0zBMdWppzB8Pgc8QXExTy4exESNBfaWrxNo2vLjfifc1XznkA7lg3MYou2edR rULL3h6aQbqYiLlveadLZsukd7kQyGQMtVk6YQWnirRHV9PFfqJa6YxJUkahzYfh9f wzhQhh5ypTUQ3UP7s0cdmKfiTg93GOEdrJVKoTYCFtGCJm9tcU3J9M5Zzkj0jCpnPd 95hpqoQGgQUuA== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , Masami Hiramatsu , Mathieu Desnoyers , Steven Rostedt , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org Subject: [RFC PATCH 16/19] mm/damon: trace probe_hits Date: Sun, 26 Apr 2026 13:52:17 -0700 Message-ID: <20260426205222.93895-17-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260426205222.93895-1-sj@kernel.org> References: <20260426205222.93895-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: ztdnr5gbo8cm3741qjzwodwhj1fy99es X-Rspamd-Queue-Id: A568E80005 X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1777236761-673 X-HE-Meta: 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 9vYxrx01 BqEtm076HUq/Ib7VEj8wg43Xcjs24mPBbscHou8Rr10tD/MFGnfMDmtkhmZJvsG4ObRN4yChXGTZsgcL6UjsjkUYKSP0dNoGpRFYKFGrxASBKhj//VBuMiBpxVMsf1eccIXo1eccMtvntPyzsbm+wrx5YUX666V/m0JoCByLZBZuzA6/oJijpsqHXzAeq5zsnydt3B+0mJyxZWFHHgAi9hUZsMX9t6pumHK9dHNgyWMz5Calbw5DSP0aMX+q1LwIkRBB4UOeqDuC/c5NcdCiD/eqwbA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Introduce a new tracepoint for exposing the per-region per-probe positive sample count via tracefs. Signed-off-by: SeongJae Park --- include/trace/events/damon.h | 41 ++++++++++++++++++++++++++++++++++++ mm/damon/core.c | 1 + 2 files changed, 42 insertions(+) diff --git a/include/trace/events/damon.h b/include/trace/events/damon.h index 7e25f4469b81b..121d7bc3a2c27 100644 --- a/include/trace/events/damon.h +++ b/include/trace/events/damon.h @@ -130,6 +130,47 @@ TRACE_EVENT(damon_monitor_intervals_tune, TP_printk("sample_us=%lu", __entry->sample_us) ); +TRACE_EVENT(damon_aggregated_v2, + + TP_PROTO(unsigned int target_id, struct damon_region *r, + unsigned int nr_regions), + + TP_ARGS(target_id, r, nr_regions), + + TP_STRUCT__entry( + __field(unsigned long, target_id) + __field(unsigned int, nr_regions) + __field(unsigned long, start) + __field(unsigned long, end) + __field(unsigned int, nr_accesses) + __field(unsigned int, age) + __field(unsigned char, probe_hit0) + __field(unsigned char, probe_hit1) + __field(unsigned char, probe_hit2) + __field(unsigned char, probe_hit3) + ), + + TP_fast_assign( + __entry->target_id = target_id; + __entry->nr_regions = nr_regions; + __entry->start = r->ar.start; + __entry->end = r->ar.end; + __entry->nr_accesses = r->nr_accesses; + __entry->age = r->age; + __entry->probe_hit0 = r->probe_hits[0]; + __entry->probe_hit1 = r->probe_hits[1]; + __entry->probe_hit2 = r->probe_hits[2]; + __entry->probe_hit3 = r->probe_hits[3]; + ), + + TP_printk("target_id=%lu nr_regions=%u %lu-%lu: %u %u %hhu %hhu %hhu %hhu", + __entry->target_id, __entry->nr_regions, + __entry->start, __entry->end, + __entry->nr_accesses, __entry->age, + __entry->probe_hit0, __entry->probe_hit1, + __entry->probe_hit2, __entry->probe_hit3) +); + TRACE_EVENT(damon_aggregated, TP_PROTO(unsigned int target_id, struct damon_region *r, diff --git a/mm/damon/core.c b/mm/damon/core.c index fe14971d72747..54834b74efef4 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -1924,6 +1924,7 @@ static void kdamond_reset_aggregated(struct damon_ctx *c) int i; trace_damon_aggregated(ti, r, damon_nr_regions(t)); + trace_damon_aggregated_v2(ti, r, damon_nr_regions(t)); damon_warn_fix_nr_accesses_corruption(r); r->last_nr_accesses = r->nr_accesses; r->nr_accesses = 0; -- 2.47.3