/* * 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 IBM Corporation, IBM Deutschland Entwicklung GmbH. * * Author: Gerald Schaefer <geraldsc@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 <linux/netdevice.h>#include <linux/sched.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 2.6};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)               */// <-- New in 2.6	/* per cpu data */	struct appldata_os_per_cpu os_cpu[0];};static struct appldata_os_data *appldata_os_data;static inline void appldata_print_debug(struct appldata_os_data *os_data){	int a0, a1, a2, i;	P_DEBUG("--- OS - RECORD ---\n");	P_DEBUG("nr_threads   = %u\n", os_data->nr_threads);	P_DEBUG("nr_running   = %u\n", os_data->nr_running);	P_DEBUG("nr_iowait    = %u\n", os_data->nr_iowait);	P_DEBUG("avenrun(int) = %8x / %8x / %8x\n", os_data->avenrun[0],		os_data->avenrun[1], os_data->avenrun[2]);	a0 = os_data->avenrun[0];	a1 = os_data->avenrun[1];	a2 = os_data->avenrun[2];	P_DEBUG("avenrun(float) = %d.%02d / %d.%02d / %d.%02d\n",		LOAD_INT(a0), LOAD_FRAC(a0), LOAD_INT(a1), LOAD_FRAC(a1),		LOAD_INT(a2), LOAD_FRAC(a2));	P_DEBUG("nr_cpus = %u\n", os_data->nr_cpus);	for (i = 0; i < os_data->nr_cpus; i++) {		P_DEBUG("cpu%u : user = %u, nice = %u, system = %u, "			"idle = %u, irq = %u, softirq = %u, iowait = %u\n",				i,				os_data->os_cpu[i].per_cpu_user,				os_data->os_cpu[i].per_cpu_nice,				os_data->os_cpu[i].per_cpu_system,				os_data->os_cpu[i].per_cpu_idle,				os_data->os_cpu[i].per_cpu_irq,				os_data->os_cpu[i].per_cpu_softirq,				os_data->os_cpu[i].per_cpu_iowait);	}	P_DEBUG("sync_count_1 = %u\n", os_data->sync_count_1);	P_DEBUG("sync_count_2 = %u\n", os_data->sync_count_2);	P_DEBUG("timestamp    = %lX\n", os_data->timestamp);}/* * appldata_get_os_data() * * gather OS data */static void appldata_get_os_data(void *data){	int i, j;	struct appldata_os_data *os_data;	os_data = data;	os_data->sync_count_1++;	os_data->nr_cpus = num_online_cpus();	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 =					kstat_cpu(i).cpustat.user;		os_data->os_cpu[j].per_cpu_nice =					kstat_cpu(i).cpustat.nice;		os_data->os_cpu[j].per_cpu_system =					kstat_cpu(i).cpustat.system;		os_data->os_cpu[j].per_cpu_idle =					kstat_cpu(i).cpustat.idle;		os_data->os_cpu[j].per_cpu_irq =					kstat_cpu(i).cpustat.irq;		os_data->os_cpu[j].per_cpu_softirq =					kstat_cpu(i).cpustat.softirq;		os_data->os_cpu[j].per_cpu_iowait =					kstat_cpu(i).cpustat.iowait;		j++;	}	os_data->timestamp = get_clock();	os_data->sync_count_2++;#ifdef APPLDATA_DEBUG	appldata_print_debug(os_data);#endif}static struct appldata_ops ops = {	.ctl_nr    = CTL_APPLDATA_OS,	.name	   = "os",	.record_nr = APPLDATA_RECORD_OS_ID,	.callback  = &appldata_get_os_data,	.owner     = THIS_MODULE,};/* * appldata_os_init() * * init data, register ops */static int __init appldata_os_init(void){	int rc, size;	size = sizeof(struct appldata_os_data) +		(NR_CPUS * sizeof(struct appldata_os_per_cpu));	if (size > APPLDATA_MAX_REC_SIZE) {		P_ERROR("Size of record = %i, bigger than maximum (%i)!\n",			size, APPLDATA_MAX_REC_SIZE);		rc = -ENOMEM;		goto out;	}	P_DEBUG("sizeof(os) = %i, sizeof(os_cpu) = %lu\n", size,		sizeof(struct appldata_os_per_cpu));	appldata_os_data = kmalloc(size, GFP_DMA);	if (appldata_os_data == NULL) {		P_ERROR("No memory for %s!\n", ops.name);		rc = -ENOMEM;		goto out;	}	memset(appldata_os_data, 0, size);	appldata_os_data->per_cpu_size = sizeof(struct appldata_os_per_cpu);	appldata_os_data->cpu_offset   = offsetof(struct appldata_os_data,							os_cpu);	P_DEBUG("cpu offset = %u\n", appldata_os_data->cpu_offset);	ops.data = appldata_os_data;	ops.size = size;	rc = appldata_register_ops(&ops);	if (rc != 0) {		P_ERROR("Error registering ops, rc = %i\n", rc);		kfree(appldata_os_data);	} else {		P_DEBUG("%s-ops registered!\n", ops.name);	}out:	return rc;}/* * appldata_os_exit() * * unregister ops */static void __exit appldata_os_exit(void){	appldata_unregister_ops(&ops);	kfree(appldata_os_data);	P_DEBUG("%s-ops unregistered!\n", ops.name);}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");