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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> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: anj64kk8rbmssg9wef814i95kq5e8787 X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 0683840003 X-HE-Tag: 1751667254-710269 X-HE-Meta: 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 oQoouLSC S7OX66oi5DVO55NOg2Pn9m/wTmYusfImzekAHmcejiGsPtCBUDypBY6u4l23Hf08cmLjwIJxLkmQ95v826ENT4Tr+wi0KZfkNP/JSOV1Es+mXMXaUVEyYL9ots05LL/hDdAIeudXqJAgb9wR3JInBuMfMG0r6EOFCPotq/xknMcmXHVCItpOSa3mW67oGCmYBt5QM2rBujLoYVF7OPiQ+LEbzMu5Iav+OMGE08YxsjMuPXs3MK3VKeiBtx9SDEzYrK/5qcj+aWBEwBKY= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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