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!

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");