a53c8fab3f
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
218 lines
6 KiB
C
218 lines
6 KiB
C
/*
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* Data gathering module for Linux-VM Monitor Stream, Stage 1.
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* Collects misc. OS related data (CPU utilization, running processes).
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*
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* Copyright IBM Corp. 2003, 2006
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*
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* Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
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*/
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#define KMSG_COMPONENT "appldata"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/kernel_stat.h>
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#include <linux/netdevice.h>
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#include <linux/sched.h>
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#include <asm/appldata.h>
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#include <asm/smp.h>
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#include "appldata.h"
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#define LOAD_INT(x) ((x) >> FSHIFT)
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#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
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/*
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* OS data
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*
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* This is accessed as binary data by z/VM. If changes to it can't be avoided,
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* the structure version (product ID, see appldata_base.c) needs to be changed
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* as well and all documentation and z/VM applications using it must be
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* updated.
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*
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* The record layout is documented in the Linux for zSeries Device Drivers
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* book:
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* http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
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*/
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struct appldata_os_per_cpu {
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u32 per_cpu_user; /* timer ticks spent in user mode */
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u32 per_cpu_nice; /* ... spent with modified priority */
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u32 per_cpu_system; /* ... spent in kernel mode */
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u32 per_cpu_idle; /* ... spent in idle mode */
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/* New in 2.6 */
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u32 per_cpu_irq; /* ... spent in interrupts */
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u32 per_cpu_softirq; /* ... spent in softirqs */
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u32 per_cpu_iowait; /* ... spent while waiting for I/O */
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/* New in modification level 01 */
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u32 per_cpu_steal; /* ... stolen by hypervisor */
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u32 cpu_id; /* number of this CPU */
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} __attribute__((packed));
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struct appldata_os_data {
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u64 timestamp;
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u32 sync_count_1; /* after VM collected the record data, */
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u32 sync_count_2; /* sync_count_1 and sync_count_2 should be the
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same. If not, the record has been updated on
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the Linux side while VM was collecting the
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(possibly corrupt) data */
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u32 nr_cpus; /* number of (virtual) CPUs */
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u32 per_cpu_size; /* size of the per-cpu data struct */
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u32 cpu_offset; /* offset of the first per-cpu data struct */
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u32 nr_running; /* number of runnable threads */
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u32 nr_threads; /* number of threads */
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u32 avenrun[3]; /* average nr. of running processes during */
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/* the last 1, 5 and 15 minutes */
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/* New in 2.6 */
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u32 nr_iowait; /* number of blocked threads
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(waiting for I/O) */
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/* per cpu data */
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struct appldata_os_per_cpu os_cpu[0];
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} __attribute__((packed));
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static struct appldata_os_data *appldata_os_data;
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static struct appldata_ops ops = {
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.name = "os",
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.record_nr = APPLDATA_RECORD_OS_ID,
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.owner = THIS_MODULE,
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.mod_lvl = {0xF0, 0xF1}, /* EBCDIC "01" */
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};
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/*
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* appldata_get_os_data()
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*
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* gather OS data
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*/
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static void appldata_get_os_data(void *data)
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{
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int i, j, rc;
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struct appldata_os_data *os_data;
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unsigned int new_size;
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os_data = data;
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os_data->sync_count_1++;
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os_data->nr_threads = nr_threads;
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os_data->nr_running = nr_running();
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os_data->nr_iowait = nr_iowait();
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os_data->avenrun[0] = avenrun[0] + (FIXED_1/200);
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os_data->avenrun[1] = avenrun[1] + (FIXED_1/200);
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os_data->avenrun[2] = avenrun[2] + (FIXED_1/200);
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j = 0;
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for_each_online_cpu(i) {
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os_data->os_cpu[j].per_cpu_user =
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cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_USER]);
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os_data->os_cpu[j].per_cpu_nice =
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cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_NICE]);
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os_data->os_cpu[j].per_cpu_system =
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cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM]);
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os_data->os_cpu[j].per_cpu_idle =
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cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IDLE]);
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os_data->os_cpu[j].per_cpu_irq =
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cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IRQ]);
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os_data->os_cpu[j].per_cpu_softirq =
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cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ]);
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os_data->os_cpu[j].per_cpu_iowait =
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cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IOWAIT]);
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os_data->os_cpu[j].per_cpu_steal =
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cputime_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_STEAL]);
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os_data->os_cpu[j].cpu_id = i;
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j++;
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}
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os_data->nr_cpus = j;
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new_size = sizeof(struct appldata_os_data) +
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(os_data->nr_cpus * sizeof(struct appldata_os_per_cpu));
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if (ops.size != new_size) {
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if (ops.active) {
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rc = appldata_diag(APPLDATA_RECORD_OS_ID,
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APPLDATA_START_INTERVAL_REC,
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(unsigned long) ops.data, new_size,
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ops.mod_lvl);
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if (rc != 0)
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pr_err("Starting a new OS data collection "
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"failed with rc=%d\n", rc);
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rc = appldata_diag(APPLDATA_RECORD_OS_ID,
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APPLDATA_STOP_REC,
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(unsigned long) ops.data, ops.size,
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ops.mod_lvl);
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if (rc != 0)
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pr_err("Stopping a faulty OS data "
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"collection failed with rc=%d\n", rc);
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}
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ops.size = new_size;
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}
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os_data->timestamp = get_clock();
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os_data->sync_count_2++;
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}
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/*
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* appldata_os_init()
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*
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* init data, register ops
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*/
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static int __init appldata_os_init(void)
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{
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int rc, max_size;
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max_size = sizeof(struct appldata_os_data) +
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(NR_CPUS * sizeof(struct appldata_os_per_cpu));
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if (max_size > APPLDATA_MAX_REC_SIZE) {
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pr_err("Maximum OS record size %i exceeds the maximum "
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"record size %i\n", max_size, APPLDATA_MAX_REC_SIZE);
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rc = -ENOMEM;
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goto out;
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}
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appldata_os_data = kzalloc(max_size, GFP_KERNEL | GFP_DMA);
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if (appldata_os_data == NULL) {
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rc = -ENOMEM;
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goto out;
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}
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appldata_os_data->per_cpu_size = sizeof(struct appldata_os_per_cpu);
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appldata_os_data->cpu_offset = offsetof(struct appldata_os_data,
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os_cpu);
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ops.data = appldata_os_data;
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ops.callback = &appldata_get_os_data;
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rc = appldata_register_ops(&ops);
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if (rc != 0)
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kfree(appldata_os_data);
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out:
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return rc;
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}
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/*
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* appldata_os_exit()
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*
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* unregister ops
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*/
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static void __exit appldata_os_exit(void)
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{
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appldata_unregister_ops(&ops);
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kfree(appldata_os_data);
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}
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module_init(appldata_os_init);
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module_exit(appldata_os_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Gerald Schaefer");
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MODULE_DESCRIPTION("Linux-VM Monitor Stream, OS statistics");
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