diff options
Diffstat (limited to 'arch/s390/appldata/appldata_os.c')
| -rw-r--r-- | arch/s390/appldata/appldata_os.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/arch/s390/appldata/appldata_os.c b/arch/s390/appldata/appldata_os.c new file mode 100644 index 000000000000..b83f07484551 --- /dev/null +++ b/arch/s390/appldata/appldata_os.c @@ -0,0 +1,241 @@ +/* + * 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"); |