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From: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
To: linux-kernel <linux-kernel@vger.kernel.org>
Subject: [RFC] patch to /proc/meminfo to display NUMA stats
Date: Mon, 22 Apr 2002 10:05:19 -0700
Below is a patch to /proc/meminfo to display free, used and total
memory per node on a NUMA machine. It works fine on an ia32
machine, but is not yet ready for submission until I make it generic.
Before I go to the effort of doing that, I thought I'd seek some feedback.
Comments?
Thanks,
Martin.
diff -urN virgin-2.4.18/arch/i386/mm/init.c linux-2.4.18-meminfo/arch/i386/mm/init.c
--- virgin-2.4.18/arch/i386/mm/init.c Fri Dec 21 09:41:53 2001
+++ linux-2.4.18-meminfo/arch/i386/mm/init.c Sun Apr 14 13:43:56 2002
@@ -598,6 +598,18 @@
return;
}
+#ifdef CONFIG_NUMA
+void si_meminfo_node(struct sysinfo *val, int nid)
+{
+ val->totalram = NODE_DATA(nid)->node_size;
+ val->freeram = nr_free_pages_node(nid);
+ val->totalhigh = NODE_DATA(nid)->node_zones[ZONE_HIGHMEM].size;
+ val->freehigh = nr_free_highpages_node(nid);
+ val->mem_unit = PAGE_SIZE;
+ return;
+}
+#endif
+
#if defined(CONFIG_X86_PAE)
struct kmem_cache_s *pae_pgd_cachep;
void __init pgtable_cache_init(void)
diff -urN virgin-2.4.18/fs/proc/proc_misc.c linux-2.4.18-meminfo/fs/proc/proc_misc.c
--- virgin-2.4.18/fs/proc/proc_misc.c Tue Nov 20 21:29:09 2001
+++ linux-2.4.18-meminfo/fs/proc/proc_misc.c Mon Apr 15 09:31:32 2002
@@ -132,7 +132,7 @@
int count, int *eof, void *data)
{
struct sysinfo i;
- int len;
+ int len, nid;
int pg_size ;
/*
@@ -185,6 +185,27 @@
K(i.freeram-i.freehigh),
K(i.totalswap),
K(i.freeswap));
+
+#ifdef CONFIG_NUMA
+ for (nid = 0; nid < numnodes; ++nid) {
+ si_meminfo_node(&i, nid);
+ len += sprintf(page+len, "\n"
+ "Node %d MemTotal: %8lu kB\n"
+ "Node %d MemFree: %8lu kB\n"
+ "Node %d MemUsed: %8lu kB\n"
+ "Node %d HighTotal: %8lu kB\n"
+ "Node %d HighFree: %8lu kB\n"
+ "Node %d LowTotal: %8lu kB\n"
+ "Node %d LowFree: %8lu kB\n",
+ nid, K(i.totalram),
+ nid, K(i.freeram),
+ nid, K(i.totalram-i.freeram),
+ nid, K(i.totalhigh),
+ nid, K(i.freehigh),
+ nid, K(i.totalram-i.totalhigh),
+ nid, K(i.freeram-i.freehigh));
+ }
+#endif
return proc_calc_metrics(page, start, off, count, eof, len);
#undef B
diff -urN virgin-2.4.18/include/linux/highmem.h linux-2.4.18-meminfo/include/linux/highmem.h
--- virgin-2.4.18/include/linux/highmem.h Mon Feb 25 11:38:13 2002
+++ linux-2.4.18-meminfo/include/linux/highmem.h Sun Apr 14 13:48:11 2002
@@ -12,6 +12,9 @@
/* declarations for linux/mm/highmem.c */
unsigned int nr_free_highpages(void);
+#ifdef CONFIG_NUMA
+unsigned int nr_free_highpages_node (int);
+#endif
extern struct buffer_head * create_bounce(int rw, struct buffer_head * bh_orig);
diff -urN virgin-2.4.18/include/linux/mm.h linux-2.4.18-meminfo/include/linux/mm.h
--- virgin-2.4.18/include/linux/mm.h Fri Dec 21 09:42:03 2001
+++ linux-2.4.18-meminfo/include/linux/mm.h Sun Apr 14 13:52:34 2002
@@ -447,6 +447,9 @@
extern void mem_init(void);
extern void show_mem(void);
extern void si_meminfo(struct sysinfo * val);
+#ifdef CONFIG_NUMA
+extern void si_meminfo_node(struct sysinfo *val, int nid);
+#endif
extern void swapin_readahead(swp_entry_t);
extern struct address_space swapper_space;
diff -urN virgin-2.4.18/include/linux/swap.h linux-2.4.18-meminfo/include/linux/swap.h
--- virgin-2.4.18/include/linux/swap.h Thu Nov 22 11:46:19 2001
+++ linux-2.4.18-meminfo/include/linux/swap.h Sun Apr 14 13:48:46 2002
@@ -84,6 +84,9 @@
#define vm_swap_full() (nr_swap_pages*2 < total_swap_pages)
extern unsigned int nr_free_pages(void);
+#ifdef CONFIG_NUMA
+extern unsigned int nr_free_pages_node (int);
+#endif
extern unsigned int nr_free_buffer_pages(void);
extern int nr_active_pages;
extern int nr_inactive_pages;
diff -urN virgin-2.4.18/mm/page_alloc.c linux-2.4.18-meminfo/mm/page_alloc.c
--- virgin-2.4.18/mm/page_alloc.c Mon Feb 25 11:38:14 2002
+++ linux-2.4.18-meminfo/mm/page_alloc.c Sun Apr 14 13:43:56 2002
@@ -462,6 +462,23 @@
return sum;
}
+#ifdef CONFIG_NUMA
+/*
+ * Total amount of free (allocatable) RAM for a given node:
+ */
+unsigned int nr_free_pages_node (int nid)
+{
+ unsigned int sum;
+ zone_t *zone;
+ pg_data_t *pgdat = NODE_DATA(nid);
+
+ sum = 0;
+ for (zone = pgdat->node_zones; zone < pgdat->node_zones + MAX_NR_ZONES; zone++)
+ sum += zone->free_pages;
+ return sum;
+}
+#endif
+
/*
* Amount of free RAM allocatable as buffer memory:
*/
@@ -500,7 +517,14 @@
}
return pages;
}
-#endif
+
+#ifdef CONFIG_NUMA
+unsigned int nr_free_highpages_node (int nid)
+{
+ return NODE_DATA(nid)->node_zones[ZONE_HIGHMEM].free_pages;
+}
+#endif /* CONFIG_NUMA */
+#endif /* CONFIG_HIGHMEM */
#define K(x) ((x) << (PAGE_SHIFT-10))
-
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