[deliverable/linux.git] / arch / s390 / appldata / appldata_mem.c

/*
 * arch/s390/appldata/appldata_mem.c
 *
 * Data gathering module for Linux-VM Monitor Stream, Stage 1.
 * Collects data related to memory management.
 *
 * Copyright (C) 2003,2006 IBM Corporation, IBM Deutschland Entwicklung GmbH.
 *
 * Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/kernel_stat.h>
#include <asm/io.h>
#include <linux/pagemap.h>
#include <linux/swap.h>

#include "appldata.h"


#define MY_PRINT_NAME "appldata_mem"		/* for debug messages, etc. */
#define P2K(x) ((x) << (PAGE_SHIFT - 10))	/* Converts #Pages to KB */

/*
 * Memory data
 *
 * This is accessed as binary data by z/VM. If changes to it can't be avoided,
 * the structure version (product ID, see appldata_base.c) needs to be changed
 * as well and all documentation and z/VM applications using it must be
 * updated.
 *
 * The record layout is documented in the Linux for zSeries Device Drivers
 * book:
 * http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
 */
struct appldata_mem_data {
	u64 timestamp;
	u32 sync_count_1;       /* after VM collected the record data, */
	u32 sync_count_2;	/* sync_count_1 and sync_count_2 should be the
				   same. If not, the record has been updated on
				   the Linux side while VM was collecting the
				   (possibly corrupt) data */

	u64 pgpgin;		/* data read from disk  */
	u64 pgpgout;		/* data written to disk */
	u64 pswpin;		/* pages swapped in  */
	u64 pswpout;		/* pages swapped out */

	u64 sharedram;		/* sharedram is currently set to 0 */

	u64 totalram;		/* total main memory size */
	u64 freeram;		/* free main memory size  */
	u64 totalhigh;		/* total high memory size */
	u64 freehigh;		/* free high memory size  */

	u64 bufferram;		/* memory reserved for buffers, free cache */
	u64 cached;		/* size of (used) cache, w/o buffers */
	u64 totalswap;		/* total swap space size */
	u64 freeswap;		/* free swap space */

// New in 2.6 -->
	u64 pgalloc;		/* page allocations */
	u64 pgfault;		/* page faults (major+minor) */
	u64 pgmajfault;		/* page faults (major only) */
// <-- New in 2.6

} __attribute__((packed)) appldata_mem_data;


static inline void appldata_debug_print(struct appldata_mem_data *mem_data)
{
	P_DEBUG("--- MEM - RECORD ---\n");
	P_DEBUG("pgpgin     = %8lu KB\n", mem_data->pgpgin);
	P_DEBUG("pgpgout    = %8lu KB\n", mem_data->pgpgout);
	P_DEBUG("pswpin     = %8lu Pages\n", mem_data->pswpin);
	P_DEBUG("pswpout    = %8lu Pages\n", mem_data->pswpout);
	P_DEBUG("pgalloc    = %8lu \n", mem_data->pgalloc);
	P_DEBUG("pgfault    = %8lu \n", mem_data->pgfault);
	P_DEBUG("pgmajfault = %8lu \n", mem_data->pgmajfault);
	P_DEBUG("sharedram  = %8lu KB\n", mem_data->sharedram);
	P_DEBUG("totalram   = %8lu KB\n", mem_data->totalram);
	P_DEBUG("freeram    = %8lu KB\n", mem_data->freeram);
	P_DEBUG("totalhigh  = %8lu KB\n", mem_data->totalhigh);
	P_DEBUG("freehigh   = %8lu KB\n", mem_data->freehigh);
	P_DEBUG("bufferram  = %8lu KB\n", mem_data->bufferram);
	P_DEBUG("cached     = %8lu KB\n", mem_data->cached);
	P_DEBUG("totalswap  = %8lu KB\n", mem_data->totalswap);
	P_DEBUG("freeswap   = %8lu KB\n", mem_data->freeswap);
	P_DEBUG("sync_count_1 = %u\n", mem_data->sync_count_1);
	P_DEBUG("sync_count_2 = %u\n", mem_data->sync_count_2);
	P_DEBUG("timestamp    = %lX\n", mem_data->timestamp);
}

/*
 * appldata_get_mem_data()
 *
 * gather memory data
 */
static void appldata_get_mem_data(void *data)
{
	/*
	 * don't put large structures on the stack, we are
	 * serialized through the appldata_ops_lock and can use static
	 */
	static struct sysinfo val;
	unsigned long ev[NR_VM_EVENT_ITEMS];
	struct appldata_mem_data *mem_data;

	mem_data = data;
	mem_data->sync_count_1++;

	all_vm_events(ev);
	mem_data->pgpgin     = ev[PGPGIN] >> 1;
	mem_data->pgpgout    = ev[PGPGOUT] >> 1;
	mem_data->pswpin     = ev[PSWPIN];
	mem_data->pswpout    = ev[PSWPOUT];
	mem_data->pgalloc    = ev[PGALLOC_HIGH] + ev[PGALLOC_NORMAL] +
			       ev[PGALLOC_DMA];
	mem_data->pgfault    = ev[PGFAULT];
	mem_data->pgmajfault = ev[PGMAJFAULT];

	si_meminfo(&val);
	mem_data->sharedram = val.sharedram;
	mem_data->totalram  = P2K(val.totalram);
	mem_data->freeram   = P2K(val.freeram);
	mem_data->totalhigh = P2K(val.totalhigh);
	mem_data->freehigh  = P2K(val.freehigh);
	mem_data->bufferram = P2K(val.bufferram);
	mem_data->cached    = P2K(global_page_state(NR_FILE_PAGES)
				- val.bufferram);

	si_swapinfo(&val);
	mem_data->totalswap = P2K(val.totalswap);
	mem_data->freeswap  = P2K(val.freeswap);

	mem_data->timestamp = get_clock();
	mem_data->sync_count_2++;
#ifdef APPLDATA_DEBUG
	appldata_debug_print(mem_data);
#endif
}


static struct appldata_ops ops = {
	.ctl_nr    = CTL_APPLDATA_MEM,
	.name      = "mem",
	.record_nr = APPLDATA_RECORD_MEM_ID,
	.size	   = sizeof(struct appldata_mem_data),
	.callback  = &appldata_get_mem_data,
	.data      = &appldata_mem_data,
	.owner     = THIS_MODULE,
	.mod_lvl   = {0xF0, 0xF0},		/* EBCDIC "00" */
};


/*
 * appldata_mem_init()
 *
 * init_data, register ops
 */
static int __init appldata_mem_init(void)
{
	int rc;

	P_DEBUG("sizeof(mem) = %lu\n", sizeof(struct appldata_mem_data));

	rc = appldata_register_ops(&ops);
	if (rc != 0) {
		P_ERROR("Error registering ops, rc = %i\n", rc);
	} else {
		P_DEBUG("%s-ops registered!\n", ops.name);
	}
	return rc;
}

/*
 * appldata_mem_exit()
 *
 * unregister ops
 */
static void __exit appldata_mem_exit(void)
{
	appldata_unregister_ops(&ops);
	P_DEBUG("%s-ops unregistered!\n", ops.name);
}


module_init(appldata_mem_init);
module_exit(appldata_mem_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Gerald Schaefer");
MODULE_DESCRIPTION("Linux-VM Monitor Stream, MEMORY statistics");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* arch/s390/appldata/appldata_mem.c
	3	*
	4	* Data gathering module for Linux-VM Monitor Stream, Stage 1.
	5	* Collects data related to memory management.
	6	*
5b5dd21a	7	* Copyright (C) 2003,2006 IBM Corporation, IBM Deutschland Entwicklung GmbH.
1da177e4	8	*
5b5dd21a	9	* Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
1da177e4 LT	10	*/
	11
	12	#include <linux/config.h>
	13	#include <linux/module.h>
	14	#include <linux/init.h>
	15	#include <linux/slab.h>
	16	#include <linux/errno.h>
	17	#include <linux/kernel_stat.h>
	18	#include <asm/io.h>
	19	#include <linux/pagemap.h>
	20	#include <linux/swap.h>
	21
	22	#include "appldata.h"
	23
	24
	25	#define MY_PRINT_NAME "appldata_mem" /* for debug messages, etc. */
	26	#define P2K(x) ((x) << (PAGE_SHIFT - 10)) /* Converts #Pages to KB */
	27
	28	/*
	29	* Memory data
	30	*
	31	* This is accessed as binary data by z/VM. If changes to it can't be avoided,
	32	* the structure version (product ID, see appldata_base.c) needs to be changed
	33	* as well and all documentation and z/VM applications using it must be
	34	* updated.
	35	*
	36	* The record layout is documented in the Linux for zSeries Device Drivers
	37	* book:
	38	* http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
	39	*/
	40	struct appldata_mem_data {
	41	u64 timestamp;
	42	u32 sync_count_1; /* after VM collected the record data, */
	43	u32 sync_count_2; /* sync_count_1 and sync_count_2 should be the
	44	same. If not, the record has been updated on
	45	the Linux side while VM was collecting the
	46	(possibly corrupt) data */
	47
	48	u64 pgpgin; /* data read from disk */
	49	u64 pgpgout; /* data written to disk */
	50	u64 pswpin; /* pages swapped in */
	51	u64 pswpout; /* pages swapped out */
	52
	53	u64 sharedram; /* sharedram is currently set to 0 */
	54
	55	u64 totalram; /* total main memory size */
	56	u64 freeram; /* free main memory size */
	57	u64 totalhigh; /* total high memory size */
	58	u64 freehigh; /* free high memory size */
	59
	60	u64 bufferram; /* memory reserved for buffers, free cache */
	61	u64 cached; /* size of (used) cache, w/o buffers */
	62	u64 totalswap; /* total swap space size */
	63	u64 freeswap; /* free swap space */
	64
	65	// New in 2.6 -->
	66	u64 pgalloc; /* page allocations */
	67	u64 pgfault; /* page faults (major+minor) */
	68	u64 pgmajfault; /* page faults (major only) */
	69	// <-- New in 2.6
	70
f26d583e	71	} __attribute__((packed)) appldata_mem_data;
1da177e4 LT	72
	73
	74	static inline void appldata_debug_print(struct appldata_mem_data *mem_data)
	75	{
	76	P_DEBUG("--- MEM - RECORD ---\n");
	77	P_DEBUG("pgpgin = %8lu KB\n", mem_data->pgpgin);
	78	P_DEBUG("pgpgout = %8lu KB\n", mem_data->pgpgout);
	79	P_DEBUG("pswpin = %8lu Pages\n", mem_data->pswpin);
	80	P_DEBUG("pswpout = %8lu Pages\n", mem_data->pswpout);
	81	P_DEBUG("pgalloc = %8lu \n", mem_data->pgalloc);
	82	P_DEBUG("pgfault = %8lu \n", mem_data->pgfault);
	83	P_DEBUG("pgmajfault = %8lu \n", mem_data->pgmajfault);
	84	P_DEBUG("sharedram = %8lu KB\n", mem_data->sharedram);
	85	P_DEBUG("totalram = %8lu KB\n", mem_data->totalram);
	86	P_DEBUG("freeram = %8lu KB\n", mem_data->freeram);
	87	P_DEBUG("totalhigh = %8lu KB\n", mem_data->totalhigh);
	88	P_DEBUG("freehigh = %8lu KB\n", mem_data->freehigh);
	89	P_DEBUG("bufferram = %8lu KB\n", mem_data->bufferram);
	90	P_DEBUG("cached = %8lu KB\n", mem_data->cached);
	91	P_DEBUG("totalswap = %8lu KB\n", mem_data->totalswap);
	92	P_DEBUG("freeswap = %8lu KB\n", mem_data->freeswap);
	93	P_DEBUG("sync_count_1 = %u\n", mem_data->sync_count_1);
	94	P_DEBUG("sync_count_2 = %u\n", mem_data->sync_count_2);
	95	P_DEBUG("timestamp = %lX\n", mem_data->timestamp);
	96	}
	97
	98	/*
	99	* appldata_get_mem_data()
	100	*
	101	* gather memory data
	102	*/
	103	static void appldata_get_mem_data(void *data)
	104	{
	105	/*
	106	* don't put large structures on the stack, we are
	107	* serialized through the appldata_ops_lock and can use static
	108	*/
	109	static struct sysinfo val;
f8891e5e	110	unsigned long ev[NR_VM_EVENT_ITEMS];
1da177e4 LT	111	struct appldata_mem_data *mem_data;
	112
	113	mem_data = data;
	114	mem_data->sync_count_1++;
	115
f8891e5e CL	116	all_vm_events(ev);
	117	mem_data->pgpgin = ev[PGPGIN] >> 1;
	118	mem_data->pgpgout = ev[PGPGOUT] >> 1;
	119	mem_data->pswpin = ev[PSWPIN];
	120	mem_data->pswpout = ev[PSWPOUT];
	121	mem_data->pgalloc = ev[PGALLOC_HIGH] + ev[PGALLOC_NORMAL] +
	122	ev[PGALLOC_DMA];
	123	mem_data->pgfault = ev[PGFAULT];
	124	mem_data->pgmajfault = ev[PGMAJFAULT];
1da177e4 LT	125
	126	si_meminfo(&val);
	127	mem_data->sharedram = val.sharedram;
	128	mem_data->totalram = P2K(val.totalram);
	129	mem_data->freeram = P2K(val.freeram);
	130	mem_data->totalhigh = P2K(val.totalhigh);
	131	mem_data->freehigh = P2K(val.freehigh);
	132	mem_data->bufferram = P2K(val.bufferram);
347ce434 CL	133	mem_data->cached = P2K(global_page_state(NR_FILE_PAGES)
347ce434 CL	134	- val.bufferram);
1da177e4 LT	135
	136	si_swapinfo(&val);
	137	mem_data->totalswap = P2K(val.totalswap);
	138	mem_data->freeswap = P2K(val.freeswap);
	139
	140	mem_data->timestamp = get_clock();
	141	mem_data->sync_count_2++;
	142	#ifdef APPLDATA_DEBUG
	143	appldata_debug_print(mem_data);
	144	#endif
	145	}
	146
	147
	148	static struct appldata_ops ops = {
	149	.ctl_nr = CTL_APPLDATA_MEM,
	150	.name = "mem",
	151	.record_nr = APPLDATA_RECORD_MEM_ID,
	152	.size = sizeof(struct appldata_mem_data),
	153	.callback = &appldata_get_mem_data,
	154	.data = &appldata_mem_data,
	155	.owner = THIS_MODULE,
5b5dd21a	156	.mod_lvl = {0xF0, 0xF0}, /* EBCDIC "00" */
1da177e4 LT	157	};
	158
	159
	160	/*
	161	* appldata_mem_init()
	162	*
	163	* init_data, register ops
	164	*/
	165	static int __init appldata_mem_init(void)
	166	{
	167	int rc;
	168
	169	P_DEBUG("sizeof(mem) = %lu\n", sizeof(struct appldata_mem_data));
	170
	171	rc = appldata_register_ops(&ops);
	172	if (rc != 0) {
	173	P_ERROR("Error registering ops, rc = %i\n", rc);
	174	} else {
	175	P_DEBUG("%s-ops registered!\n", ops.name);
	176	}
	177	return rc;
	178	}
	179
	180	/*
	181	* appldata_mem_exit()
	182	*
	183	* unregister ops
	184	*/
	185	static void __exit appldata_mem_exit(void)
	186	{
	187	appldata_unregister_ops(&ops);
	188	P_DEBUG("%s-ops unregistered!\n", ops.name);
	189	}
	190
	191
	192	module_init(appldata_mem_init);
	193	module_exit(appldata_mem_exit);
	194
	195	MODULE_LICENSE("GPL");
	196	MODULE_AUTHOR("Gerald Schaefer");
	197	MODULE_DESCRIPTION("Linux-VM Monitor Stream, MEMORY statistics");