From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 96DA9CD4F39 for ; Fri, 15 May 2026 00:45:26 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 4E5266B00A3; Thu, 14 May 2026 20:44:56 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4BD866B00A4; Thu, 14 May 2026 20:44:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3D2376B00A5; Thu, 14 May 2026 20:44:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id 1D3706B00A4 for ; Thu, 14 May 2026 20:44:56 -0400 (EDT) Received: from smtpin17.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay09.hostedemail.com (Postfix) with ESMTP id D9CED8D100 for ; Fri, 15 May 2026 00:44:55 +0000 (UTC) X-FDA: 84767809350.17.D784BA8 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf17.hostedemail.com (Postfix) with ESMTP id 3B4CB40006 for ; Fri, 15 May 2026 00:44:54 +0000 (UTC) Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=Jwg9Kxxy; spf=pass (imf17.hostedemail.com: domain of sj@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1778805894; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=XJnelCSa+BtwQYwzCXrmaNpWbkQOm6uDto3EhFhoCoM=; b=b0Vta1cVdOOEIUd6IJv5vZrotCusxT+rTzjprXV8rQV0PvLDH7D8qFzGTTbHS+mZ7laNvt It9n5MtvIK8uijwNwIK6JetgYGbnUXqyYRC5bTNMtltPVqcnQHV0iQQ9AfCaV9NjYbyC99 1xdZN9Sv7nWGizHLU2w8ZGIU6JQmnRI= ARC-Authentication-Results: i=1; imf17.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=Jwg9Kxxy; spf=pass (imf17.hostedemail.com: domain of sj@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1778805894; a=rsa-sha256; cv=none; b=rlq8QWC0/Agg7leBtVe1D3YRaAe9B/xTPmFeLSZZV2fI0YY4Kt3dqZHkpZytPZLr5TAfOq Q2pRdiAqyLU2NhNcg7GTulRrXKVHSSiXFVLbyEeknB70hvvSf6+31W7qPHG+81K1BKZ+EW 7fJFypL8alreA0G0ylDrQQ7byJjObbE= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id EE44A4036D; Fri, 15 May 2026 00:44:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7233AC2BCB3; Fri, 15 May 2026 00:44:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778805893; bh=O6Hl0Mh7Nxw8m7P+hZlG7JicrW7ipkVD+m8lBYL3rME=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Jwg9Kxxyp5SiFWyPel8l0mDAk7ys3Acb2RUOzTSm9Zbjp0NCywgHIm0e71oWxPoOa /MR06AYDIZMsnHne9/DRPkuwuIKS+i1bAOFv9boEKqLPy+p65t0GVhg3QCMY6bZxcr mvtkEB4O3u42wydFD1ryEEzGi9t/fEMeJ9yEittT+Klo7hbpWqmqo1zJiiyijvFHT9 IzsP4ozltwnkSolKLVlg15pg88U+q7O/a9VSFFL+A3aAKbcpPF8QzbrR/leL44Rhm7 MmIIX+8XH/RXkeUSV1+Iwp5VNeAiiOGhU2MmEItoI98Mt56V5TULNeFXQujxRlbA5a qoTB6HGcFM/lg== 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 v2.2 18/28] mm/damon: trace probe_hits Date: Thu, 14 May 2026 17:44:19 -0700 Message-ID: <20260515004433.128933-19-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260515004433.128933-1-sj@kernel.org> References: <20260515004433.128933-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 3B4CB40006 X-Rspam-User: X-Stat-Signature: f6qi93ffeegyesx77ct7iumt1o815hqr X-HE-Tag: 1778805894-269362 X-HE-Meta: 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 3Tih28Hj 2UVtE778KFTrFP7akCDE+0WXRd8srtU2dKyZvKc16+nusC6JYpTtlp+fypP9tiGEN1kZfMmKjBET1vWIUaOoFnV5CptnZP6fAmCGImXUwvd5JNR9XrVdhafNqXafjxTWJ9U4OXceZkCS7TZrsf3QzbLVEQdFw5rest7GQTA/LX1gwUCl+QZ4dN33oZOF3cabSt6RyaRrUA6IFX+HrNGatd96HLXl8taXABenc0x7tXr7n8wUHH2K4Vr7h/u3KnDw2RummxRZIatDHYxCNnAeo/bRdQdMLR4S3+b0q 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 | 38 ++++++++++++++++++++++++++++++++++++ mm/damon/core.c | 9 +++++++++ 2 files changed, 47 insertions(+) diff --git a/include/trace/events/damon.h b/include/trace/events/damon.h index 24fc402ab3c85..ec1e317923fd3 100644 --- a/include/trace/events/damon.h +++ b/include/trace/events/damon.h @@ -130,6 +130,44 @@ TRACE_EVENT(damon_monitor_intervals_tune, TP_printk("sample_us=%lu", __entry->sample_us) ); +TRACE_EVENT_CONDITION(damon_aggregated_v2, + + TP_PROTO(unsigned int target_id, struct damon_region *r, + unsigned int nr_regions, unsigned int nr_probes), + + TP_ARGS(target_id, r, nr_regions, nr_probes), + + TP_CONDITION(nr_probes > 0), + + TP_STRUCT__entry( + __field(unsigned long, target_id) + __field(unsigned long, start) + __field(unsigned long, end) + __field(unsigned int, nr_regions) + __field(unsigned int, nr_accesses) + __field(unsigned int, age) + __dynamic_array(unsigned char, probe_hits, nr_probes) + ), + + TP_fast_assign( + __entry->target_id = target_id; + __entry->start = r->ar.start; + __entry->end = r->ar.end; + __entry->nr_regions = nr_regions; + __entry->nr_accesses = r->nr_accesses; + __entry->age = r->age; + memcpy(__get_dynamic_array(probe_hits), r->probe_hits, + sizeof(*r->probe_hits) * nr_probes); + ), + + TP_printk("target_id=%lu nr_regions=%u %lu-%lu: %u %u probe_hits=%s", + __entry->target_id, __entry->nr_regions, + __entry->start, __entry->end, + __entry->nr_accesses, __entry->age, + __print_hex(__get_dynamic_array(probe_hits), + __get_dynamic_array_len(probe_hits))) +); + 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 1c9d2fb69f98d..ab8ac9ec8450d 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -1881,6 +1881,13 @@ static void kdamond_reset_aggregated(struct damon_ctx *c) { struct damon_target *t; unsigned int ti = 0; /* target's index */ + unsigned int nr_probes = 0; + struct damon_probe *probe; + + if (trace_damon_aggregated_v2_enabled()) { + damon_for_each_probe(probe, c) + nr_probes++; + } damon_for_each_target(t, c) { struct damon_region *r; @@ -1889,6 +1896,8 @@ 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), + nr_probes); damon_warn_fix_nr_accesses_corruption(r); r->last_nr_accesses = r->nr_accesses; r->nr_accesses = 0; -- 2.47.3