From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8F6243148D3; Sun, 26 Apr 2026 20:52:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777236760; cv=none; b=JIODRI0Svsp/sOr15Wn0sJhWx44V+Zd9zt++s9SaDj7ElzNU9KJwDb0NmU6Yf6WQSyDcIigRJTHYIzBjACvL9P/OB+NLwgsW0H/gnMSwKDQVX/oNlX/sjJQKsf0usMdYPbsj3vVtZa+UBCcrp1Z23n9E483mx2MtqLKsDq+HIyw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777236760; c=relaxed/simple; bh=+a7yddQciqqedy5ZtwOx7GN0gf1QkvZ1siaztRsfHgQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mTXcZ3hOxt5+crOAFBvDmUWmi74ts8j2T7ghtQGYU165NHJz+MnfFgaotm55sFr/RZQ16XZ9qT8QjZ8JS2IumgC6+J1wiR9eLf5GlcIxq4KDmUioOuJnfCAHFbYULfXEzBJQYBJx3GShLNRYSkAnoEgugtJByC6xOZc+Drt7tDI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XueNJUqJ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XueNJUqJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EB18EC2BCB9; Sun, 26 Apr 2026 20:52:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777236760; bh=+a7yddQciqqedy5ZtwOx7GN0gf1QkvZ1siaztRsfHgQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; 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> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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