[net-next-2.6.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>
 */

#define KMSG_COMPONENT	"appldata"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

#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 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)
				pr_err("Starting a new OS data collection "
				       "failed with rc=%d\n", rc);

			rc = appldata_diag(APPLDATA_RECORD_OS_ID,
					   APPLDATA_STOP_REC,
					   (unsigned long) ops.data, ops.size,
					   ops.mod_lvl);
			if (rc != 0)
				pr_err("Stopping a faulty OS data "
				       "collection failed with rc=%d\n", rc);
		}
		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) {
		pr_err("Maximum OS record size %i exceeds the maximum "
		       "record size %i\n", max_size, APPLDATA_MAX_REC_SIZE);
		rc = -ENOMEM;
		goto out;
	}

	appldata_os_data = kzalloc(max_size, GFP_KERNEL | 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
e7534b0e GS	12	#define KMSG_COMPONENT "appldata"
	13	#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
	14
1da177e4 LT	15	#include <linux/module.h>
	16	#include <linux/init.h>
	17	#include <linux/slab.h>
	18	#include <linux/errno.h>
	19	#include <linux/kernel_stat.h>
	20	#include <linux/netdevice.h>
	21	#include <linux/sched.h>
1f38d613	22	#include <asm/appldata.h>
1da177e4 LT	23	#include <asm/smp.h>
	24
	25	#include "appldata.h"
	26
	27
1da177e4 LT	28	#define LOAD_INT(x) ((x) >> FSHIFT)
	29	#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
	30
	31	/*
	32	* OS data
	33	*
	34	* This is accessed as binary data by z/VM. If changes to it can't be avoided,
	35	* the structure version (product ID, see appldata_base.c) needs to be changed
	36	* as well and all documentation and z/VM applications using it must be
	37	* updated.
	38	*
	39	* The record layout is documented in the Linux for zSeries Device Drivers
	40	* book:
	41	* http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
	42	*/
	43	struct appldata_os_per_cpu {
	44	u32 per_cpu_user; /* timer ticks spent in user mode */
	45	u32 per_cpu_nice; /* ... spent with modified priority */
	46	u32 per_cpu_system; /* ... spent in kernel mode */
	47	u32 per_cpu_idle; /* ... spent in idle mode */
	48
5b5dd21a	49	/* New in 2.6 */
1da177e4 LT	50	u32 per_cpu_irq; /* ... spent in interrupts */
	51	u32 per_cpu_softirq; /* ... spent in softirqs */
	52	u32 per_cpu_iowait; /* ... spent while waiting for I/O */
5b5dd21a GS	53
	54	/* New in modification level 01 */
	55	u32 per_cpu_steal; /* ... stolen by hypervisor */
	56	u32 cpu_id; /* number of this CPU */
f26d583e	57	} __attribute__((packed));
1da177e4 LT	58
	59	struct appldata_os_data {
	60	u64 timestamp;
	61	u32 sync_count_1; /* after VM collected the record data, */
	62	u32 sync_count_2; /* sync_count_1 and sync_count_2 should be the
	63	same. If not, the record has been updated on
	64	the Linux side while VM was collecting the
	65	(possibly corrupt) data */
	66
	67	u32 nr_cpus; /* number of (virtual) CPUs */
	68	u32 per_cpu_size; /* size of the per-cpu data struct */
	69	u32 cpu_offset; /* offset of the first per-cpu data struct */
	70
	71	u32 nr_running; /* number of runnable threads */
	72	u32 nr_threads; /* number of threads */
	73	u32 avenrun[3]; /* average nr. of running processes during */
	74	/* the last 1, 5 and 15 minutes */
	75
5b5dd21a	76	/* New in 2.6 */
1da177e4 LT	77	u32 nr_iowait; /* number of blocked threads
1da177e4 LT	78	(waiting for I/O) */
1da177e4 LT	79
	80	/* per cpu data */
	81	struct appldata_os_per_cpu os_cpu[0];
f26d583e	82	} __attribute__((packed));
1da177e4 LT	83
	84	static struct appldata_os_data *appldata_os_data;
	85
5b5dd21a	86	static struct appldata_ops ops = {
5b5dd21a GS	87	.name = "os",
	88	.record_nr = APPLDATA_RECORD_OS_ID,
	89	.owner = THIS_MODULE,
	90	.mod_lvl = {0xF0, 0xF1}, /* EBCDIC "01" */
	91	};
	92
1da177e4	93
1da177e4 LT	94	/*
	95	* appldata_get_os_data()
	96	*
	97	* gather OS data
	98	*/
	99	static void appldata_get_os_data(void *data)
	100	{
5b5dd21a	101	int i, j, rc;
1da177e4	102	struct appldata_os_data *os_data;
5b5dd21a	103	unsigned int new_size;
1da177e4 LT	104
	105	os_data = data;
	106	os_data->sync_count_1++;
	107
1da177e4 LT	108	os_data->nr_threads = nr_threads;
	109	os_data->nr_running = nr_running();
	110	os_data->nr_iowait = nr_iowait();
	111	os_data->avenrun[0] = avenrun[0] + (FIXED_1/200);
	112	os_data->avenrun[1] = avenrun[1] + (FIXED_1/200);
	113	os_data->avenrun[2] = avenrun[2] + (FIXED_1/200);
	114
	115	j = 0;
	116	for_each_online_cpu(i) {
	117	os_data->os_cpu[j].per_cpu_user =
089545f0	118	cputime_to_jiffies(kstat_cpu(i).cpustat.user);
1da177e4	119	os_data->os_cpu[j].per_cpu_nice =
089545f0	120	cputime_to_jiffies(kstat_cpu(i).cpustat.nice);
1da177e4	121	os_data->os_cpu[j].per_cpu_system =
089545f0	122	cputime_to_jiffies(kstat_cpu(i).cpustat.system);
1da177e4	123	os_data->os_cpu[j].per_cpu_idle =
089545f0	124	cputime_to_jiffies(kstat_cpu(i).cpustat.idle);
1da177e4	125	os_data->os_cpu[j].per_cpu_irq =
089545f0	126	cputime_to_jiffies(kstat_cpu(i).cpustat.irq);
1da177e4	127	os_data->os_cpu[j].per_cpu_softirq =
089545f0	128	cputime_to_jiffies(kstat_cpu(i).cpustat.softirq);
1da177e4	129	os_data->os_cpu[j].per_cpu_iowait =
089545f0	130	cputime_to_jiffies(kstat_cpu(i).cpustat.iowait);
5b5dd21a GS	131	os_data->os_cpu[j].per_cpu_steal =
	132	cputime_to_jiffies(kstat_cpu(i).cpustat.steal);
	133	os_data->os_cpu[j].cpu_id = i;
1da177e4 LT	134	j++;
	135	}
	136
5b5dd21a GS	137	os_data->nr_cpus = j;
	138
	139	new_size = sizeof(struct appldata_os_data) +
	140	(os_data->nr_cpus * sizeof(struct appldata_os_per_cpu));
	141	if (ops.size != new_size) {
	142	if (ops.active) {
	143	rc = appldata_diag(APPLDATA_RECORD_OS_ID,
	144	APPLDATA_START_INTERVAL_REC,
	145	(unsigned long) ops.data, new_size,
	146	ops.mod_lvl);
d3ae942d	147	if (rc != 0)
e7534b0e GS	148	pr_err("Starting a new OS data collection "
e7534b0e GS	149	"failed with rc=%d\n", rc);
5b5dd21a GS	150
	151	rc = appldata_diag(APPLDATA_RECORD_OS_ID,
	152	APPLDATA_STOP_REC,
	153	(unsigned long) ops.data, ops.size,
	154	ops.mod_lvl);
	155	if (rc != 0)
e7534b0e GS	156	pr_err("Stopping a faulty OS data "
e7534b0e GS	157	"collection failed with rc=%d\n", rc);
5b5dd21a GS	158	}
	159	ops.size = new_size;
	160	}
1da177e4 LT	161	os_data->timestamp = get_clock();
1da177e4 LT	162	os_data->sync_count_2++;
1da177e4 LT	163	}
	164
	165
1da177e4 LT	166	/*
	167	* appldata_os_init()
	168	*
	169	* init data, register ops
	170	*/
	171	static int __init appldata_os_init(void)
	172	{
5b5dd21a	173	int rc, max_size;
1da177e4	174
5b5dd21a GS	175	max_size = sizeof(struct appldata_os_data) +
	176	(NR_CPUS * sizeof(struct appldata_os_per_cpu));
	177	if (max_size > APPLDATA_MAX_REC_SIZE) {
e7534b0e GS	178	pr_err("Maximum OS record size %i exceeds the maximum "
e7534b0e GS	179	"record size %i\n", max_size, APPLDATA_MAX_REC_SIZE);
1da177e4 LT	180	rc = -ENOMEM;
	181	goto out;
	182	}
1da177e4	183
c2f0e8c8	184	appldata_os_data = kzalloc(max_size, GFP_KERNEL \| GFP_DMA);
1da177e4	185	if (appldata_os_data == NULL) {
1da177e4 LT	186	rc = -ENOMEM;
	187	goto out;
	188	}
1da177e4 LT	189
	190	appldata_os_data->per_cpu_size = sizeof(struct appldata_os_per_cpu);
	191	appldata_os_data->cpu_offset = offsetof(struct appldata_os_data,
	192	os_cpu);
1da177e4 LT	193
1da177e4 LT	194	ops.data = appldata_os_data;
5b5dd21a	195	ops.callback = &appldata_get_os_data;
1da177e4	196	rc = appldata_register_ops(&ops);
d3ae942d	197	if (rc != 0)
1da177e4	198	kfree(appldata_os_data);
1da177e4 LT	199	out:
	200	return rc;
	201	}
	202
	203	/*
	204	* appldata_os_exit()
	205	*
	206	* unregister ops
	207	*/
	208	static void __exit appldata_os_exit(void)
	209	{
	210	appldata_unregister_ops(&ops);
	211	kfree(appldata_os_data);
1da177e4 LT	212	}
	213
	214
	215	module_init(appldata_os_init);
	216	module_exit(appldata_os_exit);
	217
	218	MODULE_LICENSE("GPL");
	219	MODULE_AUTHOR("Gerald Schaefer");
	220	MODULE_DESCRIPTION("Linux-VM Monitor Stream, OS statistics");