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 B949919D8B3; Fri, 14 Jun 2024 16:39:41 +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=1718383181; cv=none; b=L3kmboe7kAJKM3H31ARjmtBdO3WxTPKw1L7AG5jVdXTjMvoNLW6y3d1yl53wOzc3SeXLnc/fvHc2z2xEsOox6CNGHDLK9NGYTSkRYgwSOnCHLu8dI2vzTJEowLFMBAKT/Yq9YQJda++HIfNkwH3buUiWq9xFezFa+jno5MG2iXY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718383181; c=relaxed/simple; bh=rQAw4/a1qgbkU6RaCZyZLYHMVr3338QIkfwOfXq06lY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=irbWu8vKcPAJZ9+nktynkkUd6bOBb9q+WP+Oi+vdBM3m1iFi1iBO7bz9Es35BW6uO00B9IungxLnupQ9KjpKxdys+1YugE7xe6HvyoKGPpUwIWnNePuyMbGVcuP0Bza2VzYVmx0vSWAFk9tZs807TQpS96MUkZUryDOojQ98Zak= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZojFhx9R; 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="ZojFhx9R" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 07463C2BD10; Fri, 14 Jun 2024 16:39:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1718383181; bh=rQAw4/a1qgbkU6RaCZyZLYHMVr3338QIkfwOfXq06lY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZojFhx9R+LTcgFWvB6D579Bp8pIHrYMdVo1lmf347EF9750RL1fZP5YQ6cP5bx56J KbS0QP56JtA/VXT8o3Kgf1w9YrMjSpiAf3gudn0XXCuYxa2vI+ha20167AnbL5WU0w o438zH18o/mVxo5f1uJHdXuytusVP2RdnCx4OxulIN4B+FInAHbHeuxgxCeXgO99iu ZBWRSgpQg4LbZpsx8VD8afNWprlGFHdxcRIg1L3UguxypEjqku93IHdHAARj0vnT59 LoSLUO5dUfHuxLEgKrCMeoHc8VF00mJFSssnmRQyYAIw2T4sWzw3R49KTJrsC/8U7b vvi+/hkfl8fvw== From: SeongJae Park To: Honggyu Kim , Andrew Morton Cc: SeongJae Park , damon@lists.linux.dev, Masami Hiramatsu , Mathieu Desnoyers , Steven Rostedt , Gregory Price , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, 42.hyeyoo@gmail.com, art.jeongseob@gmail.com, kernel_team@skhynix.com, Hyeongtak Ji , Rakie Kim , Yunjeong Mun Subject: Re: [PATCH v6 0/7] DAMON based tiered memory management for CXL memory Date: Fri, 14 Jun 2024 09:39:37 -0700 Message-Id: <20240614163937.85523-1-sj@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240614030010.751-1-honggyu.kim@sk.com> References: 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 On Fri, 14 Jun 2024 12:00:02 +0900 Honggyu Kim wrote: > There was an RFC IDEA "DAMOS-based Tiered-Memory Management" previously > posted at [1]. > > It says there is no implementation of the demote/promote DAMOS action > are made. This patch series is about its implementation for physical > address space so that this scheme can be applied in system wide level. > > Changes from v5: > https://lore.kernel.org/20240613132056.608-1-honggyu.kim@sk.com > 1. Remove new actions in usage document as its for debugfs Thank you, I confirmed this and gave you my Reviewed-by: tag. > 2. Apply minor fixes on cover letter But... [...] > 2. YCSB zipfian distribution read only workload (with demotion_enabled true) > memory pressure with cold memory on node0 with 512GB of local DRAM. > ====================+================================================+========= > | cold memory occupied by mmap and memset | > | 0G 440G 450G 460G 470G 480G 490G 500G | > ====================+================================================+========= > Execution time normalized to DRAM-only values | GEOMEAN > --------------------+------------------------------------------------+--------- > DAMON tiered | - 1.03 1.03 1.03 1.03 1.03 1.07 1.05 | 1.04 > DAMON lazy | - 1.04 1.03 1.04 1.05 1.06 1.06 1.06 | 1.05 > DAMON tiered kswapd | - 1.03 1.03 1.03 1.03 1.02 1.02 1.03 | 1.03 > DAMON lazy kswapd | - 1.04 1.04 1.04 1.03 1.05 1.04 1.05 | 1.04 > ====================+================================================+========= > CXL usage of redis-server in GB | AVERAGE > --------------------+------------------------------------------------+--------- > DAMON tiered | - 0.6 0.5 0.4 0.7 0.8 7.1 5.6 | 2.2 > DAMON lazy | - 0.5 3.0 4.5 5.4 6.4 9.4 9.1 | 5.5 > DAMON tiered kswapd | - 0.0 0.0 0.4 0.5 0.1 0.8 1.0 | 0.4 > DAMON lazy kswapd | - 4.2 4.6 5.3 1.7 6.8 8.1 5.8 | 5.2 > ====================+================================================+========= > > Each test result is based on the exeuction environment as follows. Seems the typo is not fixed? I don't want to delay this work for such trivial thing, though. For the patch series, Acked-by: SeongJae Park Thanks, SJ [...]