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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/s390/appldata/appldata_os.c
downloadlinux-2.6.34-ux500-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/s390/appldata/appldata_os.c')
-rw-r--r--arch/s390/appldata/appldata_os.c241
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
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+++ b/arch/s390/appldata/appldata_os.c
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+/*
+ * 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");