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 9CC3328983F; Fri, 4 Jul 2025 22:14:14 +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=1751667254; cv=none; b=dHidhJHHM4OR7xHlReX4Hwr5mKEfE9baqD5ABWY2WpfGaeOAof0HuaG/peeqd/4C3GduUFwGUiibkIxMu+2gSNHuS8hU4DgIEbKTZIVcVJi6taL7Hl+jjFvA9QAG3yO2kubEkeDLMKQemZGMINrGf9PEXJdt/C8ZYzWTN6mgwZM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751667254; c=relaxed/simple; bh=/5CFWtg/RaFEpwdd6ARNdP/CgJAOsslo+1EYnA8neGM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=r3fbEWIvk36rnvNlrV+bub6vwFfqwq/o14CqGKGq+iAVa9GluKdKIdtmqYONZT224wEnTg0VC6iGRLTPEs16tf9nX90tKGNDE20CW+GyZ03e6QOt1e4G1e4+dPZqRLj9CGAPHfnOHoimXTy1RI/9l9bHdTOrudO50/PJjuLV7/8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=iwfi0RHG; 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="iwfi0RHG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 09DD1C4CEEE; Fri, 4 Jul 2025 22:14:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1751667254; bh=/5CFWtg/RaFEpwdd6ARNdP/CgJAOsslo+1EYnA8neGM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iwfi0RHGn03WWT4i9KSEiakwBG1MOYOhRZkG0Q/MZ9Eg97vDwDDuCSTturpHTUOHl 8iGbD0MY0683tJkjAiuJdllNJpvM/E8s4GiuM3l3Q6fzxD6XyosNI5wFGTozg6qzr0 jzX4J9MPCbFkxDIgIWEfkACtXtXvlwPfs6ZW2WeJ+YlYySvcbuqrtTm3hLiNqEM94T Rx5RezFD8TfAHMZdxSfOYUIfj7onCSEtNth5NYUiFJ/rY/WIooEtLt+7NacTr8PsCf BfhYCZlPtmJZ4Km9Hu1hE/PtHQUB2RH+1dU0WXed0WIgvEnmZuKT5BNB6v6gJMbtyz MfRgwwo9SVjuw== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , Masami Hiramatsu , Mathieu Desnoyers , Steven Rostedt , damon@lists.linux.dev, kernel-team@meta.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org Subject: [PATCH 1/2] mm/damon: add trace event for auto-tuned monitoring intervals Date: Fri, 4 Jul 2025 15:14:07 -0700 Message-Id: <20250704221408.38510-2-sj@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250704221408.38510-1-sj@kernel.org> References: <20250704221408.38510-1-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 Aim-oriented monitoring intervals auto-tuning is an important and recommended feature for DAMON users. Add a trace event for the observability of the tuned intervals and tuning itself. Signed-off-by: SeongJae Park --- include/trace/events/damon.h | 17 +++++++++++++++++ mm/damon/core.c | 1 + 2 files changed, 18 insertions(+) diff --git a/include/trace/events/damon.h b/include/trace/events/damon.h index da4bd9fd1162..32c611076023 100644 --- a/include/trace/events/damon.h +++ b/include/trace/events/damon.h @@ -48,6 +48,23 @@ TRACE_EVENT_CONDITION(damos_before_apply, __entry->nr_accesses, __entry->age) ); +TRACE_EVENT(damon_monitor_intervals_tune, + + TP_PROTO(unsigned long sample_us), + + TP_ARGS(sample_us), + + TP_STRUCT__entry( + __field(unsigned long, sample_us) + ), + + TP_fast_assign( + __entry->sample_us = sample_us; + ), + + TP_printk("sample_us=%lu", __entry->sample_us) +); + 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 979b29e16ef4..57a1ace4d10d 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -1490,6 +1490,7 @@ static void kdamond_tune_intervals(struct damon_ctx *c) new_attrs.sample_interval); new_attrs.aggr_interval = new_attrs.sample_interval * c->attrs.aggr_samples; + trace_damon_monitor_intervals_tune(new_attrs.sample_interval); damon_set_attrs(c, &new_attrs); } -- 2.39.5