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Bhat" Subject: [RFC PATCH v4 14/40] mm: Enable per-memory-region fragmentation stats in pagetypeinfo To: akpm@linux-foundation.org, mgorman@suse.de, dave@sr71.net, hannes@cmpxchg.org, tony.luck@intel.com, matthew.garrett@nebula.com, riel@redhat.com, arjan@linux.intel.com, srinivas.pandruvada@linux.intel.com, willy@linux.intel.com, kamezawa.hiroyu@jp.fujitsu.com, lenb@kernel.org, rjw@sisk.pl Cc: gargankita@gmail.com, paulmck@linux.vnet.ibm.com, svaidy@linux.vnet.ibm.com, andi@firstfloor.org, isimatu.yasuaki@jp.fujitsu.com, santosh.shilimkar@ti.com, kosaki.motohiro@gmail.com, srivatsa.bhat@linux.vnet.ibm.com, linux-pm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Date: Thu, 26 Sep 2013 04:47:00 +0530 Message-ID: <20130925231658.26184.52456.stgit@srivatsabhat.in.ibm.com> In-Reply-To: <20130925231250.26184.31438.stgit@srivatsabhat.in.ibm.com> References: <20130925231250.26184.31438.stgit@srivatsabhat.in.ibm.com> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13092523-1618-0000-0000-000004B0A170 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-5.5 required=5.0 tests=BAYES_00,KHOP_BIG_TO_CC, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Pagetypeinfo is invaluable in observing the fragmentation of memory into different migratetypes. Modify this code to also print out the fragmentation statistics at a per-zone-memory-region granularity (along with the existing per-zone reporting). This helps us observe the effects of influencing memory allocation decisions at the page-allocator level and understand the extent to which they help in consolidation. Signed-off-by: Srivatsa S. Bhat --- mm/vmstat.c | 86 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 84 insertions(+), 2 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/mm/vmstat.c b/mm/vmstat.c index 8e8c8bd..bb44d30 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -926,6 +926,35 @@ static void pagetypeinfo_showfree_print(struct seq_file *m, } } +static void pagetypeinfo_showfree_region_print(struct seq_file *m, + pg_data_t *pgdat, + struct zone *zone) +{ + int order, mtype, i; + + for (mtype = 0; mtype < MIGRATE_TYPES; mtype++) { + + for (i = 0; i < zone->nr_zone_regions; i++) { + seq_printf(m, "Node %4d, zone %8s, R%3d %12s ", + pgdat->node_id, + zone->name, + i, + migratetype_names[mtype]); + + for (order = 0; order < MAX_ORDER; ++order) { + struct free_area *area; + + area = &(zone->free_area[order]); + + seq_printf(m, "%6lu ", + area->free_list[mtype].mr_list[i].nr_free); + } + seq_putc(m, '\n'); + } + + } +} + /* Print out the free pages at each order for each migatetype */ static int pagetypeinfo_showfree(struct seq_file *m, void *arg) { @@ -940,6 +969,11 @@ static int pagetypeinfo_showfree(struct seq_file *m, void *arg) walk_zones_in_node(m, pgdat, pagetypeinfo_showfree_print); + seq_putc(m, '\n'); + + /* Print the free pages at each migratetype, per memory region */ + walk_zones_in_node(m, pgdat, pagetypeinfo_showfree_region_print); + return 0; } @@ -971,24 +1005,72 @@ static void pagetypeinfo_showblockcount_print(struct seq_file *m, } /* Print counts */ - seq_printf(m, "Node %d, zone %8s ", pgdat->node_id, zone->name); + seq_printf(m, "Node %d, zone %8s ", pgdat->node_id, zone->name); for (mtype = 0; mtype < MIGRATE_TYPES; mtype++) seq_printf(m, "%12lu ", count[mtype]); seq_putc(m, '\n'); } +static void pagetypeinfo_showblockcount_region_print(struct seq_file *m, + pg_data_t *pgdat, struct zone *zone) +{ + int mtype, i; + unsigned long pfn; + unsigned long start_pfn, end_pfn; + unsigned long count[MIGRATE_TYPES] = { 0, }; + + for (i = 0; i < zone->nr_zone_regions; i++) { + start_pfn = zone->zone_regions[i].start_pfn; + end_pfn = zone->zone_regions[i].end_pfn; + + for (pfn = start_pfn; pfn < end_pfn; + pfn += pageblock_nr_pages) { + struct page *page; + + if (!pfn_valid(pfn)) + continue; + + page = pfn_to_page(pfn); + + /* Watch for unexpected holes punched in the memmap */ + if (!memmap_valid_within(pfn, page, zone)) + continue; + + mtype = get_pageblock_migratetype(page); + + if (mtype < MIGRATE_TYPES) + count[mtype]++; + } + + /* Print counts */ + seq_printf(m, "Node %d, zone %8s R%3d ", pgdat->node_id, + zone->name, i); + for (mtype = 0; mtype < MIGRATE_TYPES; mtype++) + seq_printf(m, "%12lu ", count[mtype]); + seq_putc(m, '\n'); + + /* Reset the counters */ + for (mtype = 0; mtype < MIGRATE_TYPES; mtype++) + count[mtype] = 0; + } +} + /* Print out the free pages at each order for each migratetype */ static int pagetypeinfo_showblockcount(struct seq_file *m, void *arg) { int mtype; pg_data_t *pgdat = (pg_data_t *)arg; - seq_printf(m, "\n%-23s", "Number of blocks type "); + seq_printf(m, "\n%-23s", "Number of blocks type "); for (mtype = 0; mtype < MIGRATE_TYPES; mtype++) seq_printf(m, "%12s ", migratetype_names[mtype]); seq_putc(m, '\n'); walk_zones_in_node(m, pgdat, pagetypeinfo_showblockcount_print); + /* Print out the pageblock info for per memory region */ + seq_putc(m, '\n'); + walk_zones_in_node(m, pgdat, pagetypeinfo_showblockcount_region_print); + return 0; }