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

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

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/kernel_stat.h>
#include <linux/netdevice.h>
#include <linux/sched.h>
#include <asm/appldata.h>
#include <asm/smp.h>

#include "appldata.h"


#define MY_PRINT_NAME	"appldata_os"		/* for debug messages, etc. */
#define LOAD_INT(x) ((x) >> FSHIFT)
#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)

/*
 * OS 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_os_per_cpu {
	u32 per_cpu_user;	/* timer ticks spent in user mode   */
	u32 per_cpu_nice;	/* ... spent with modified priority */
	u32 per_cpu_system;	/* ... spent in kernel mode         */
	u32 per_cpu_idle;	/* ... spent in idle mode           */

	/* New in 2.6 */
	u32 per_cpu_irq;	/* ... spent in interrupts          */
	u32 per_cpu_softirq;	/* ... spent in softirqs            */
	u32 per_cpu_iowait;	/* ... spent while waiting for I/O  */

	/* New in modification level 01 */
	u32 per_cpu_steal;	/* ... stolen by hypervisor	    */
	u32 cpu_id;		/* number of this CPU		    */
} __attribute__((packed));

struct appldata_os_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 */

	u32 nr_cpus;		/* number of (virtual) CPUs        */
	u32 per_cpu_size;	/* size of the per-cpu data struct */
	u32 cpu_offset;		/* offset of the first per-cpu data struct */

	u32 nr_running;		/* number of runnable threads      */
	u32 nr_threads;		/* number of threads               */
	u32 avenrun[3];		/* average nr. of running processes during */
				/* the last 1, 5 and 15 minutes */

	/* New in 2.6 */
	u32 nr_iowait;		/* number of blocked threads
				   (waiting for I/O)               */

	/* per cpu data */
	struct appldata_os_per_cpu os_cpu[0];
} __attribute__((packed));

static struct appldata_os_data *appldata_os_data;

static struct appldata_ops ops = {
	.name	   = "os",
	.record_nr = APPLDATA_RECORD_OS_ID,
	.owner	   = THIS_MODULE,
	.mod_lvl   = {0xF0, 0xF1},		/* EBCDIC "01" */
};


/*
 * appldata_get_os_data()
 *
 * gather OS data
 */
static void appldata_get_os_data(void *data)
{
	int i, j, rc;
	struct appldata_os_data *os_data;
	unsigned int new_size;

	os_data = data;
	os_data->sync_count_1++;

	os_data->nr_threads = nr_threads;
	os_data->nr_running = nr_running();
	os_data->nr_iowait  = nr_iowait();
	os_data->avenrun[0] = avenrun[0] + (FIXED_1/200);
	os_data->avenrun[1] = avenrun[1] + (FIXED_1/200);
	os_data->avenrun[2] = avenrun[2] + (FIXED_1/200);

	j = 0;
	for_each_online_cpu(i) {
		os_data->os_cpu[j].per_cpu_user =
			cputime_to_jiffies(kstat_cpu(i).cpustat.user);
		os_data->os_cpu[j].per_cpu_nice =
			cputime_to_jiffies(kstat_cpu(i).cpustat.nice);
		os_data->os_cpu[j].per_cpu_system =
			cputime_to_jiffies(kstat_cpu(i).cpustat.system);
		os_data->os_cpu[j].per_cpu_idle =
			cputime_to_jiffies(kstat_cpu(i).cpustat.idle);
		os_data->os_cpu[j].per_cpu_irq =
			cputime_to_jiffies(kstat_cpu(i).cpustat.irq);
		os_data->os_cpu[j].per_cpu_softirq =
			cputime_to_jiffies(kstat_cpu(i).cpustat.softirq);
		os_data->os_cpu[j].per_cpu_iowait =
			cputime_to_jiffies(kstat_cpu(i).cpustat.iowait);
		os_data->os_cpu[j].per_cpu_steal =
			cputime_to_jiffies(kstat_cpu(i).cpustat.steal);
		os_data->os_cpu[j].cpu_id = i;
		j++;
	}

	os_data->nr_cpus = j;

	new_size = sizeof(struct appldata_os_data) +
		   (os_data->nr_cpus * sizeof(struct appldata_os_per_cpu));
	if (ops.size != new_size) {
		if (ops.active) {
			rc = appldata_diag(APPLDATA_RECORD_OS_ID,
					   APPLDATA_START_INTERVAL_REC,
					   (unsigned long) ops.data, new_size,
					   ops.mod_lvl);
			if (rc != 0)
				P_ERROR("os: START NEW DIAG 0xDC failed, "
					"return code: %d, new size = %i\n", rc,
					new_size);

			rc = appldata_diag(APPLDATA_RECORD_OS_ID,
					   APPLDATA_STOP_REC,
					   (unsigned long) ops.data, ops.size,
					   ops.mod_lvl);
			if (rc != 0)
				P_ERROR("os: STOP OLD DIAG 0xDC failed, "
					"return code: %d, old size = %i\n", rc,
					ops.size);
			else
				P_INFO("os: old record size = %i stopped\n",
					ops.size);
		}
		ops.size = new_size;
	}
	os_data->timestamp = get_clock();
	os_data->sync_count_2++;
}


/*
 * appldata_os_init()
 *
 * init data, register ops
 */
static int __init appldata_os_init(void)
{
	int rc, max_size;

	max_size = sizeof(struct appldata_os_data) +
		   (NR_CPUS * sizeof(struct appldata_os_per_cpu));
	if (max_size > APPLDATA_MAX_REC_SIZE) {
		P_ERROR("Max. size of OS record = %i, bigger than maximum "
			"record size (%i)\n", max_size, APPLDATA_MAX_REC_SIZE);
		rc = -ENOMEM;
		goto out;
	}

	appldata_os_data = kzalloc(max_size, GFP_DMA);
	if (appldata_os_data == NULL) {
		rc = -ENOMEM;
		goto out;
	}

	appldata_os_data->per_cpu_size = sizeof(struct appldata_os_per_cpu);
	appldata_os_data->cpu_offset   = offsetof(struct appldata_os_data,
							os_cpu);

	ops.data = appldata_os_data;
	ops.callback  = &appldata_get_os_data;
	rc = appldata_register_ops(&ops);
	if (rc != 0)
		kfree(appldata_os_data);
out:
	return rc;
}

/*
 * appldata_os_exit()
 *
 * unregister ops
 */
static void __exit appldata_os_exit(void)
{
	appldata_unregister_ops(&ops);
	kfree(appldata_os_data);
}


module_init(appldata_os_init);
module_exit(appldata_os_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Gerald Schaefer");
MODULE_DESCRIPTION("Linux-VM Monitor Stream, OS statistics");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* arch/s390/appldata/appldata_os.c
	3	*
	4	* Data gathering module for Linux-VM Monitor Stream, Stage 1.
	5	* Collects misc. OS related data (CPU utilization, running processes).
	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	*/
1da177e4 LT	11
1da177e4 LT	12	#include <linux/module.h>
	13	#include <linux/init.h>
	14	#include <linux/slab.h>
	15	#include <linux/errno.h>
	16	#include <linux/kernel_stat.h>
	17	#include <linux/netdevice.h>
	18	#include <linux/sched.h>
1f38d613	19	#include <asm/appldata.h>
1da177e4 LT	20	#include <asm/smp.h>
	21
	22	#include "appldata.h"
	23
	24
	25	#define MY_PRINT_NAME "appldata_os" /* for debug messages, etc. */
	26	#define LOAD_INT(x) ((x) >> FSHIFT)
	27	#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
	28
	29	/*
	30	* OS data
	31	*
	32	* This is accessed as binary data by z/VM. If changes to it can't be avoided,
	33	* the structure version (product ID, see appldata_base.c) needs to be changed
	34	* as well and all documentation and z/VM applications using it must be
	35	* updated.
	36	*
	37	* The record layout is documented in the Linux for zSeries Device Drivers
	38	* book:
	39	* http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
	40	*/
	41	struct appldata_os_per_cpu {
	42	u32 per_cpu_user; /* timer ticks spent in user mode */
	43	u32 per_cpu_nice; /* ... spent with modified priority */
	44	u32 per_cpu_system; /* ... spent in kernel mode */
	45	u32 per_cpu_idle; /* ... spent in idle mode */
	46
5b5dd21a	47	/* New in 2.6 */
1da177e4 LT	48	u32 per_cpu_irq; /* ... spent in interrupts */
	49	u32 per_cpu_softirq; /* ... spent in softirqs */
	50	u32 per_cpu_iowait; /* ... spent while waiting for I/O */
5b5dd21a GS	51
	52	/* New in modification level 01 */
	53	u32 per_cpu_steal; /* ... stolen by hypervisor */
	54	u32 cpu_id; /* number of this CPU */
f26d583e	55	} __attribute__((packed));
1da177e4 LT	56
	57	struct appldata_os_data {
	58	u64 timestamp;
	59	u32 sync_count_1; /* after VM collected the record data, */
	60	u32 sync_count_2; /* sync_count_1 and sync_count_2 should be the
	61	same. If not, the record has been updated on
	62	the Linux side while VM was collecting the
	63	(possibly corrupt) data */
	64
	65	u32 nr_cpus; /* number of (virtual) CPUs */
	66	u32 per_cpu_size; /* size of the per-cpu data struct */
	67	u32 cpu_offset; /* offset of the first per-cpu data struct */
	68
	69	u32 nr_running; /* number of runnable threads */
	70	u32 nr_threads; /* number of threads */
	71	u32 avenrun[3]; /* average nr. of running processes during */
	72	/* the last 1, 5 and 15 minutes */
	73
5b5dd21a	74	/* New in 2.6 */
1da177e4 LT	75	u32 nr_iowait; /* number of blocked threads
1da177e4 LT	76	(waiting for I/O) */
1da177e4 LT	77
	78	/* per cpu data */
	79	struct appldata_os_per_cpu os_cpu[0];
f26d583e	80	} __attribute__((packed));
1da177e4 LT	81
	82	static struct appldata_os_data *appldata_os_data;
	83
5b5dd21a	84	static struct appldata_ops ops = {
5b5dd21a GS	85	.name = "os",
	86	.record_nr = APPLDATA_RECORD_OS_ID,
	87	.owner = THIS_MODULE,
	88	.mod_lvl = {0xF0, 0xF1}, /* EBCDIC "01" */
	89	};
	90
1da177e4	91
1da177e4 LT	92	/*
	93	* appldata_get_os_data()
	94	*
	95	* gather OS data
	96	*/
	97	static void appldata_get_os_data(void *data)
	98	{
5b5dd21a	99	int i, j, rc;
1da177e4	100	struct appldata_os_data *os_data;
5b5dd21a	101	unsigned int new_size;
1da177e4 LT	102
	103	os_data = data;
	104	os_data->sync_count_1++;
	105
1da177e4 LT	106	os_data->nr_threads = nr_threads;
	107	os_data->nr_running = nr_running();
	108	os_data->nr_iowait = nr_iowait();
	109	os_data->avenrun[0] = avenrun[0] + (FIXED_1/200);
	110	os_data->avenrun[1] = avenrun[1] + (FIXED_1/200);
	111	os_data->avenrun[2] = avenrun[2] + (FIXED_1/200);
	112
	113	j = 0;
	114	for_each_online_cpu(i) {
	115	os_data->os_cpu[j].per_cpu_user =
089545f0	116	cputime_to_jiffies(kstat_cpu(i).cpustat.user);
1da177e4	117	os_data->os_cpu[j].per_cpu_nice =
089545f0	118	cputime_to_jiffies(kstat_cpu(i).cpustat.nice);
1da177e4	119	os_data->os_cpu[j].per_cpu_system =
089545f0	120	cputime_to_jiffies(kstat_cpu(i).cpustat.system);
1da177e4	121	os_data->os_cpu[j].per_cpu_idle =
089545f0	122	cputime_to_jiffies(kstat_cpu(i).cpustat.idle);
1da177e4	123	os_data->os_cpu[j].per_cpu_irq =
089545f0	124	cputime_to_jiffies(kstat_cpu(i).cpustat.irq);
1da177e4	125	os_data->os_cpu[j].per_cpu_softirq =
089545f0	126	cputime_to_jiffies(kstat_cpu(i).cpustat.softirq);
1da177e4	127	os_data->os_cpu[j].per_cpu_iowait =
089545f0	128	cputime_to_jiffies(kstat_cpu(i).cpustat.iowait);
5b5dd21a GS	129	os_data->os_cpu[j].per_cpu_steal =
	130	cputime_to_jiffies(kstat_cpu(i).cpustat.steal);
	131	os_data->os_cpu[j].cpu_id = i;
1da177e4 LT	132	j++;
	133	}
	134
5b5dd21a GS	135	os_data->nr_cpus = j;
	136
	137	new_size = sizeof(struct appldata_os_data) +
	138	(os_data->nr_cpus * sizeof(struct appldata_os_per_cpu));
	139	if (ops.size != new_size) {
	140	if (ops.active) {
	141	rc = appldata_diag(APPLDATA_RECORD_OS_ID,
	142	APPLDATA_START_INTERVAL_REC,
	143	(unsigned long) ops.data, new_size,
	144	ops.mod_lvl);
d3ae942d	145	if (rc != 0)
5b5dd21a GS	146	P_ERROR("os: START NEW DIAG 0xDC failed, "
	147	"return code: %d, new size = %i\n", rc,
	148	new_size);
5b5dd21a GS	149
	150	rc = appldata_diag(APPLDATA_RECORD_OS_ID,
	151	APPLDATA_STOP_REC,
	152	(unsigned long) ops.data, ops.size,
	153	ops.mod_lvl);
	154	if (rc != 0)
	155	P_ERROR("os: STOP OLD DIAG 0xDC failed, "
	156	"return code: %d, old size = %i\n", rc,
	157	ops.size);
	158	else
	159	P_INFO("os: old record size = %i stopped\n",
	160	ops.size);
	161	}
	162	ops.size = new_size;
	163	}
1da177e4 LT	164	os_data->timestamp = get_clock();
1da177e4 LT	165	os_data->sync_count_2++;
1da177e4 LT	166	}
	167
	168
1da177e4 LT	169	/*
	170	* appldata_os_init()
	171	*
	172	* init data, register ops
	173	*/
	174	static int __init appldata_os_init(void)
	175	{
5b5dd21a	176	int rc, max_size;
1da177e4	177
5b5dd21a GS	178	max_size = sizeof(struct appldata_os_data) +
	179	(NR_CPUS * sizeof(struct appldata_os_per_cpu));
	180	if (max_size > APPLDATA_MAX_REC_SIZE) {
	181	P_ERROR("Max. size of OS record = %i, bigger than maximum "
	182	"record size (%i)\n", max_size, APPLDATA_MAX_REC_SIZE);
1da177e4 LT	183	rc = -ENOMEM;
	184	goto out;
	185	}
1da177e4	186
5b5dd21a	187	appldata_os_data = kzalloc(max_size, GFP_DMA);
1da177e4	188	if (appldata_os_data == NULL) {
1da177e4 LT	189	rc = -ENOMEM;
	190	goto out;
	191	}
1da177e4 LT	192
	193	appldata_os_data->per_cpu_size = sizeof(struct appldata_os_per_cpu);
	194	appldata_os_data->cpu_offset = offsetof(struct appldata_os_data,
	195	os_cpu);
1da177e4 LT	196
1da177e4 LT	197	ops.data = appldata_os_data;
5b5dd21a	198	ops.callback = &appldata_get_os_data;
1da177e4	199	rc = appldata_register_ops(&ops);
d3ae942d	200	if (rc != 0)
1da177e4	201	kfree(appldata_os_data);
1da177e4 LT	202	out:
	203	return rc;
	204	}
	205
	206	/*
	207	* appldata_os_exit()
	208	*
	209	* unregister ops
	210	*/
	211	static void __exit appldata_os_exit(void)
	212	{
	213	appldata_unregister_ops(&ops);
	214	kfree(appldata_os_data);
1da177e4 LT	215	}
	216
	217
	218	module_init(appldata_os_init);
	219	module_exit(appldata_os_exit);
	220
	221	MODULE_LICENSE("GPL");
	222	MODULE_AUTHOR("Gerald Schaefer");
	223	MODULE_DESCRIPTION("Linux-VM Monitor Stream, OS statistics");