From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 5 Jun 2008 16:33:38 -0700 From: Keika Kobayashi Subject: [PATCH 3/3 v2] per-task-delay-accounting: update document and getdelays.c for memory reclaim Message-Id: <20080605163338.8880eb7f.kobayashi.kk@ncos.nec.co.jp> In-Reply-To: <20080605162759.a6adf291.kobayashi.kk@ncos.nec.co.jp> References: <20080605162759.a6adf291.kobayashi.kk@ncos.nec.co.jp> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Keika Kobayashi Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, akpm@linux-foundation.org, nagar@watson.ibm.com, balbir@in.ibm.com, sekharan@us.ibm.com, kosaki.motohiro@jp.fujitsu.com, kamezawa.hiroyu@jp.fujitsu.com List-ID: Update document and make getdelays.c show delay accounting for memory reclaim. For making a distinction between "swapping in pages" and "memory reclaim" in getdelays.c, MEM is changed to SWAP. Signed-off-by: Keika Kobayashi --- Documentation/accounting/delay-accounting.txt | 11 ++++++++--- Documentation/accounting/getdelays.c | 8 ++++++-- 2 files changed, 14 insertions(+), 5 deletions(-) diff --git a/Documentation/accounting/delay-accounting.txt b/Documentation/accounting/delay-accounting.txt index 1443cd7..8a12f07 100644 --- a/Documentation/accounting/delay-accounting.txt +++ b/Documentation/accounting/delay-accounting.txt @@ -11,6 +11,7 @@ the delays experienced by a task while a) waiting for a CPU (while being runnable) b) completion of synchronous block I/O initiated by the task c) swapping in pages +d) memory reclaim and makes these statistics available to userspace through the taskstats interface. @@ -41,7 +42,7 @@ this structure. See include/linux/taskstats.h for a description of the fields pertaining to delay accounting. It will generally be in the form of counters returning the cumulative -delay seen for cpu, sync block I/O, swapin etc. +delay seen for cpu, sync block I/O, swapin, memory reclaim etc. Taking the difference of two successive readings of a given counter (say cpu_delay_total) for a task will give the delay @@ -94,7 +95,9 @@ CPU count real total virtual total delay total 7876 92005750 100000000 24001500 IO count delay total 0 0 -MEM count delay total +SWAP count delay total + 0 0 +RECLAIM count delay total 0 0 Get delays seen in executing a given simple command @@ -108,5 +111,7 @@ CPU count real total virtual total delay total 6 4000250 4000000 0 IO count delay total 0 0 -MEM count delay total +SWAP count delay total + 0 0 +RECLAIM count delay total 0 0 diff --git a/Documentation/accounting/getdelays.c b/Documentation/accounting/getdelays.c index 40121b5..3f7755f 100644 --- a/Documentation/accounting/getdelays.c +++ b/Documentation/accounting/getdelays.c @@ -196,14 +196,18 @@ void print_delayacct(struct taskstats *t) " %15llu%15llu%15llu%15llu\n" "IO %15s%15s\n" " %15llu%15llu\n" - "MEM %15s%15s\n" + "SWAP %15s%15s\n" + " %15llu%15llu\n" + "RECLAIM %12s%15s\n" " %15llu%15llu\n", "count", "real total", "virtual total", "delay total", t->cpu_count, t->cpu_run_real_total, t->cpu_run_virtual_total, t->cpu_delay_total, "count", "delay total", t->blkio_count, t->blkio_delay_total, - "count", "delay total", t->swapin_count, t->swapin_delay_total); + "count", "delay total", t->swapin_count, t->swapin_delay_total, + "count", "delay total", + t->freepages_count, t->freepages_delay_total); } void task_context_switch_counts(struct taskstats *t) -- 1.5.0.6 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org