From patchwork Mon Feb 24 12:30:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: SeongJae Park X-Patchwork-Id: 11400375 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0B947930 for ; Mon, 24 Feb 2020 12:34:17 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id BF56220836 for ; Mon, 24 Feb 2020 12:34:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="dxb+KTsF" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BF56220836 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=amazon.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 0E0886B0007; Mon, 24 Feb 2020 07:34:16 -0500 (EST) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 069956B0008; Mon, 24 Feb 2020 07:34:15 -0500 (EST) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E9A746B000A; Mon, 24 Feb 2020 07:34:15 -0500 (EST) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0151.hostedemail.com [216.40.44.151]) by kanga.kvack.org (Postfix) with ESMTP id D178E6B0007 for ; Mon, 24 Feb 2020 07:34:15 -0500 (EST) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 9E47A4404 for ; Mon, 24 Feb 2020 12:34:15 +0000 (UTC) X-FDA: 76524963270.24.skirt66_5f4cb407d1245 X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,prvs=316760060=sjpark@amazon.com,,RULES_HIT:2539:30003:30012:30034:30054:30064:30067:30075,0,RBL:207.171.190.10:@amazon.com:.lbl8.mailshell.net-62.18.0.100 66.10.201.10,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: skirt66_5f4cb407d1245 X-Filterd-Recvd-Size: 8929 Received: from smtp-fw-33001.amazon.com (smtp-fw-33001.amazon.com [207.171.190.10]) by imf16.hostedemail.com (Postfix) with ESMTP for ; Mon, 24 Feb 2020 12:34:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1582547655; x=1614083655; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=1Ha8ON0h4SjWTd4XBuay1zXzKA+SvZ2mNjaTZnYuBUM=; b=dxb+KTsFfAE00JAA6X1nYn4Fd736TZ8+GgNqJymCRKtvcw53k16KiLhs 8WFTz7Ady8ERmxX3EdlrY1dbMTics6aQpH5YrtvmyEVc9q/pzL/2W9SN4 Zg5vizg02IjhD6Timm3rCC2lE3OS7MAXPvstWlFfRm0LHHQBQ6HNxTADM Q=; IronPort-SDR: nrOAWOManoQ8jOznJmPzpRuBR9uNqkfoXZLrxSYxFglxxBgskGzedTW679+aBTyix76cV7G6wA nijnuWeq7mQg== X-IronPort-AV: E=Sophos;i="5.70,480,1574121600"; d="scan'208";a="28454528" Received: from sea32-co-svc-lb4-vlan3.sea.corp.amazon.com (HELO email-inbound-relay-2c-1968f9fa.us-west-2.amazon.com) ([10.47.23.38]) by smtp-border-fw-out-33001.sea14.amazon.com with ESMTP; 24 Feb 2020 12:34:12 +0000 Received: from EX13MTAUEA002.ant.amazon.com (pdx4-ws-svc-p6-lb7-vlan3.pdx.amazon.com [10.170.41.166]) by email-inbound-relay-2c-1968f9fa.us-west-2.amazon.com (Postfix) with ESMTPS id 2BB26A1FE6; Mon, 24 Feb 2020 12:34:02 +0000 (UTC) Received: from EX13D31EUA001.ant.amazon.com (10.43.165.15) by EX13MTAUEA002.ant.amazon.com (10.43.61.77) with Microsoft SMTP Server (TLS) id 15.0.1236.3; Mon, 24 Feb 2020 12:34:02 +0000 Received: from u886c93fd17d25d.ant.amazon.com (10.43.162.53) by EX13D31EUA001.ant.amazon.com (10.43.165.15) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Mon, 24 Feb 2020 12:33:50 +0000 From: SeongJae Park To: CC: SeongJae Park , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v6 07/14] mm/damon: Implement kernel space API Date: Mon, 24 Feb 2020 13:30:40 +0100 Message-ID: <20200224123047.32506-8-sjpark@amazon.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200224123047.32506-1-sjpark@amazon.com> References: <20200224123047.32506-1-sjpark@amazon.com> MIME-Version: 1.0 X-Originating-IP: [10.43.162.53] X-ClientProxiedBy: EX13D19UWC003.ant.amazon.com (10.43.162.184) To EX13D31EUA001.ant.amazon.com (10.43.165.15) 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: From: SeongJae Park This commit implements the DAMON api for the kernel. Other kernel code can use DAMON by calling damon_start() and damon_stop() with their own 'struct damon_ctx'. Signed-off-by: SeongJae Park --- include/linux/damon.h | 71 +++++++++++++++++++++++++++++++++++++++++++ mm/damon.c | 71 +++++++++---------------------------------- 2 files changed, 85 insertions(+), 57 deletions(-) create mode 100644 include/linux/damon.h diff --git a/include/linux/damon.h b/include/linux/damon.h new file mode 100644 index 000000000000..78785cb88d42 --- /dev/null +++ b/include/linux/damon.h @@ -0,0 +1,71 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * DAMON api + * + * Copyright 2019 Amazon.com, Inc. or its affiliates. All rights reserved. + * + * Author: SeongJae Park + */ + +#ifndef _DAMON_H_ +#define _DAMON_H_ + +#include +#include +#include +#include + +/* Represents a monitoring target region on the virtual address space */ +struct damon_region { + unsigned long vm_start; + unsigned long vm_end; + unsigned long sampling_addr; + unsigned int nr_accesses; + struct list_head list; +}; + +/* Represents a monitoring target task */ +struct damon_task { + unsigned long pid; + struct list_head regions_list; + struct list_head list; +}; + +struct damon_ctx { + unsigned long sample_interval; + unsigned long aggr_interval; + unsigned long regions_update_interval; + unsigned long min_nr_regions; + unsigned long max_nr_regions; + + struct timespec64 last_aggregation; + struct timespec64 last_regions_update; + + unsigned char *rbuf; + unsigned int rbuf_len; + unsigned int rbuf_offset; + char *rfile_path; + + struct task_struct *kdamond; + bool kdamond_stop; + spinlock_t kdamond_lock; + + struct rnd_state rndseed; + + struct list_head tasks_list; /* 'damon_task' objects */ + + /* callbacks */ + void (*sample_cb)(struct damon_ctx *context); + void (*aggregate_cb)(struct damon_ctx *context); +}; + +int damon_set_pids(struct damon_ctx *ctx, + unsigned long *pids, ssize_t nr_pids); +int damon_set_recording(struct damon_ctx *ctx, + unsigned int rbuf_len, char *rfile_path); +int damon_set_attrs(struct damon_ctx *ctx, unsigned long s, unsigned long a, + unsigned long r, unsigned long min, unsigned long max); +int damon_start(struct damon_ctx *ctx); +int damon_stop(struct damon_ctx *ctx); + +#endif diff --git a/mm/damon.c b/mm/damon.c index a7edb2dfa700..b3e9b9da5720 100644 --- a/mm/damon.c +++ b/mm/damon.c @@ -9,6 +9,7 @@ #define pr_fmt(fmt) "damon: " fmt +#include #include #include #include @@ -40,60 +41,6 @@ #define damon_for_each_task_safe(ctx, t, next) \ list_for_each_entry_safe(t, next, &(ctx)->tasks_list, list) -/* Represents a monitoring target region on the virtual address space */ -struct damon_region { - unsigned long vm_start; - unsigned long vm_end; - unsigned long sampling_addr; - unsigned int nr_accesses; - struct list_head list; -}; - -/* Represents a monitoring target task */ -struct damon_task { - unsigned long pid; - struct list_head regions_list; - struct list_head list; -}; - -/* - * For each 'sample_interval', DAMON checks whether each region is accessed or - * not. It aggregates and keeps the access information (number of accesses to - * each region) for each 'aggr_interval' time. And for each - * 'regions_update_interval', damon checks whether the memory mapping of the - * target tasks has changed (e.g., by mmap() calls from the applications) and - * applies the changes. - * - * All time intervals are in micro-seconds. - */ -struct damon_ctx { - unsigned long sample_interval; - unsigned long aggr_interval; - unsigned long regions_update_interval; - unsigned long min_nr_regions; - unsigned long max_nr_regions; - - struct timespec64 last_aggregation; - struct timespec64 last_regions_update; - - unsigned char *rbuf; - unsigned int rbuf_len; - unsigned int rbuf_offset; - char *rfile_path; - - struct task_struct *kdamond; - bool kdamond_stop; - spinlock_t kdamond_lock; - - struct rnd_state rndseed; - - struct list_head tasks_list; /* 'damon_task' objects */ - - /* callbacks */ - void (*sample_cb)(struct damon_ctx *context); - void (*aggregate_cb)(struct damon_ctx *context); -}; - #define MAX_RFILE_PATH_LEN 256 /* Get a random number in [l, r) */ @@ -961,10 +908,20 @@ static int damon_turn_kdamond(struct damon_ctx *ctx, bool on) return 0; } +int damon_start(struct damon_ctx *ctx) +{ + return damon_turn_kdamond(ctx, true); +} + +int damon_stop(struct damon_ctx *ctx) +{ + return damon_turn_kdamond(ctx, false); +} + /* * This function should not be called while the kdamond is running. */ -static int damon_set_pids(struct damon_ctx *ctx, +int damon_set_pids(struct damon_ctx *ctx, unsigned long *pids, ssize_t nr_pids) { ssize_t i; @@ -998,7 +955,7 @@ static int damon_set_pids(struct damon_ctx *ctx, * * Returns 0 on success, negative error code otherwise. */ -static int damon_set_recording(struct damon_ctx *ctx, +int damon_set_recording(struct damon_ctx *ctx, unsigned int rbuf_len, char *rfile_path) { size_t rfile_path_len; @@ -1046,7 +1003,7 @@ static int damon_set_recording(struct damon_ctx *ctx, * * Returns 0 on success, negative error code otherwise. */ -static int damon_set_attrs(struct damon_ctx *ctx, unsigned long sample_int, +int damon_set_attrs(struct damon_ctx *ctx, unsigned long sample_int, unsigned long aggr_int, unsigned long regions_update_int, unsigned long min_nr_reg, unsigned long max_nr_reg) {