[S390] appldata enhancements.

Add CPU ID and steal time, and make OS record size variable.

Signed-off-by: Gerald Schaefer <geraldsc@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 67 insertions, 31 deletions

diff --git a/arch/s390/appldata/appldata_os.c b/arch/s390/appldata/appldata_os.c
index 99ddd3bf2fba..f2b44a2f1dec 100644
--- a/arch/s390/appldata/appldata_os.c
+++ b/arch/s390/appldata/appldata_os.c
@@ -4,9 +4,9 @@
  * 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.
+ * Copyright (C) 2003,2006 IBM Corporation, IBM Deutschland Entwicklung GmbH.
  *
- * Author: Gerald Schaefer <geraldsc@de.ibm.com>
+ * Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
  */
 
 #include <linux/config.h>
@@ -44,11 +44,14 @@ struct appldata_os_per_cpu {
         u32 per_cpu_system;     /* ... spent in kernel mode         */
         u32 per_cpu_idle;       /* ... spent in idle mode           */
 
-// New in 2.6 -->
+        /* 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
+
+        /* 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 {
@@ -68,10 +71,9 @@ struct appldata_os_data {
         u32 avenrun[3];         /* average nr. of running processes during */
                                 /* the last 1, 5 and 15 minutes */
 
-// New in 2.6 -->
+        /* 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];
@@ -79,6 +81,14 @@ struct appldata_os_data {
 
 static struct appldata_os_data *appldata_os_data;
 
+static struct appldata_ops ops = {
+        .ctl_nr    = CTL_APPLDATA_OS,
+        .name      = "os",
+        .record_nr = APPLDATA_RECORD_OS_ID,
+        .owner     = THIS_MODULE,
+        .mod_lvl   = {0xF0, 0xF1},              /* EBCDIC "01" */
+};
+
 
 static inline void appldata_print_debug(struct appldata_os_data *os_data)
 {
@@ -100,15 +110,17 @@ static inline void appldata_print_debug(struct appldata_os_data *os_data)
         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,
+                        "idle = %u, irq = %u, softirq = %u, iowait = %u, "
+                        "steal = %u\n",
+                                os_data->os_cpu[i].cpu_id,
                                 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);
+                                os_data->os_cpu[i].per_cpu_iowait,
+                                os_data->os_cpu[i].per_cpu_steal);
         }
 
         P_DEBUG("sync_count_1 = %u\n", os_data->sync_count_1);
@@ -123,14 +135,13 @@ static inline void appldata_print_debug(struct appldata_os_data *os_data)
  */
 static void appldata_get_os_data(void *data)
 {
-        int i, j;
+        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_cpus = num_online_cpus();
-
         os_data->nr_threads = nr_threads;
         os_data->nr_running = nr_running();
         os_data->nr_iowait  = nr_iowait();
@@ -154,9 +165,44 @@ static void appldata_get_os_data(void *data)
                         cputime_to_jiffies(kstat_cpu(i).cpustat.softirq);
                 os_data->os_cpu[j].per_cpu_iowait =
                         cputime_to_jiffies(kstat_cpu(i).cpustat.iowait);
+                os_data->os_cpu[j].per_cpu_steal =
+                        cputime_to_jiffies(kstat_cpu(i).cpustat.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) {
+                                P_ERROR("os: START NEW DIAG 0xDC failed, "
+                                        "return code: %d, new size = %i\n", rc,
+                                        new_size);
+                                P_INFO("os: stopping old record now\n");
+                        } else
+                                P_INFO("os: new record size = %i\n", new_size);
+
+                        rc = appldata_diag(APPLDATA_RECORD_OS_ID,
+                                           APPLDATA_STOP_REC,
+                                           (unsigned long) ops.data, ops.size,
+                                           ops.mod_lvl);
+                        if (rc != 0)
+                                P_ERROR("os: STOP OLD DIAG 0xDC failed, "
+                                        "return code: %d, old size = %i\n", rc,
+                                        ops.size);
+                        else
+                                P_INFO("os: old record size = %i stopped\n",
+                                        ops.size);
+                }
+                ops.size = new_size;
+        }
         os_data->timestamp = get_clock();
         os_data->sync_count_2++;
 #ifdef APPLDATA_DEBUG
@@ -165,15 +211,6 @@ static void appldata_get_os_data(void *data)
 }
 
 
-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()
  *
@@ -181,26 +218,25 @@ static struct appldata_ops ops = {
  */
 static int __init appldata_os_init(void)
 {
-        int rc, size;
+        int rc, max_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);
+        max_size = sizeof(struct appldata_os_data) +
+                   (NR_CPUS * sizeof(struct appldata_os_per_cpu));
+        if (max_size > APPLDATA_MAX_REC_SIZE) {
+                P_ERROR("Max. size of OS record = %i, bigger than maximum "
+                        "record size (%i)\n", max_size, APPLDATA_MAX_REC_SIZE);
                 rc = -ENOMEM;
                 goto out;
         }
-        P_DEBUG("sizeof(os) = %i, sizeof(os_cpu) = %lu\n", size,
+        P_DEBUG("max. sizeof(os) = %i, sizeof(os_cpu) = %lu\n", max_size,
                 sizeof(struct appldata_os_per_cpu));
 
-        appldata_os_data = kmalloc(size, GFP_DMA);
+        appldata_os_data = kzalloc(max_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,
@@ -208,7 +244,7 @@ static int __init appldata_os_init(void)
         P_DEBUG("cpu offset = %u\n", appldata_os_data->cpu_offset);
 
         ops.data = appldata_os_data;
-        ops.size = size;
+        ops.callback  = &appldata_get_os_data;
         rc = appldata_register_ops(&ops);
         if (rc != 0) {
                 P_ERROR("Error registering ops, rc = %i\n", rc);