| /* |
| * Data gathering module for Linux-VM Monitor Stream, Stage 1. |
| * Collects misc. OS related data (CPU utilization, running processes). |
| * |
| * Copyright IBM Corp. 2003, 2006 |
| * |
| * 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 = |
| nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_USER]); |
| os_data->os_cpu[j].per_cpu_nice = |
| nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_NICE]); |
| os_data->os_cpu[j].per_cpu_system = |
| nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM]); |
| os_data->os_cpu[j].per_cpu_idle = |
| nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IDLE]); |
| os_data->os_cpu[j].per_cpu_irq = |
| nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IRQ]); |
| os_data->os_cpu[j].per_cpu_softirq = |
| nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ]); |
| os_data->os_cpu[j].per_cpu_iowait = |
| nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IOWAIT]); |
| os_data->os_cpu[j].per_cpu_steal = |
| nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_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_tod_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) + |
| (num_possible_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"); |