^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Data gathering module for Linux-VM Monitor Stream, Stage 1.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Collects misc. OS related data (CPU utilization, running processes).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright IBM Corp. 2003, 2006
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define KMSG_COMPONENT "appldata"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/kernel_stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/sched/loadavg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/sched/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/appldata.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <asm/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include "appldata.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * OS data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * This is accessed as binary data by z/VM. If changes to it can't be avoided,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * the structure version (product ID, see appldata_base.c) needs to be changed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * as well and all documentation and z/VM applications using it must be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * updated.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct appldata_os_per_cpu {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) u32 per_cpu_user; /* timer ticks spent in user mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) u32 per_cpu_nice; /* ... spent with modified priority */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) u32 per_cpu_system; /* ... spent in kernel mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) u32 per_cpu_idle; /* ... spent in idle mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /* New in 2.6 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) u32 per_cpu_irq; /* ... spent in interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) u32 per_cpu_softirq; /* ... spent in softirqs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) u32 per_cpu_iowait; /* ... spent while waiting for I/O */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /* New in modification level 01 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) u32 per_cpu_steal; /* ... stolen by hypervisor */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) u32 cpu_id; /* number of this CPU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) } __attribute__((packed));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct appldata_os_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) u64 timestamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) u32 sync_count_1; /* after VM collected the record data, */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) u32 sync_count_2; /* sync_count_1 and sync_count_2 should be the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) same. If not, the record has been updated on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) the Linux side while VM was collecting the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) (possibly corrupt) data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) u32 nr_cpus; /* number of (virtual) CPUs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) u32 per_cpu_size; /* size of the per-cpu data struct */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) u32 cpu_offset; /* offset of the first per-cpu data struct */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) u32 nr_running; /* number of runnable threads */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) u32 nr_threads; /* number of threads */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) u32 avenrun[3]; /* average nr. of running processes during */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /* the last 1, 5 and 15 minutes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* New in 2.6 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) u32 nr_iowait; /* number of blocked threads
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) (waiting for I/O) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /* per cpu data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct appldata_os_per_cpu os_cpu[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) } __attribute__((packed));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) static struct appldata_os_data *appldata_os_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static struct appldata_ops ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) .name = "os",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) .record_nr = APPLDATA_RECORD_OS_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) .mod_lvl = {0xF0, 0xF1}, /* EBCDIC "01" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * appldata_get_os_data()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * gather OS data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static void appldata_get_os_data(void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) int i, j, rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) struct appldata_os_data *os_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) unsigned int new_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) os_data = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) os_data->sync_count_1++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) os_data->nr_threads = nr_threads;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) os_data->nr_running = nr_running();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) os_data->nr_iowait = nr_iowait();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) os_data->avenrun[0] = avenrun[0] + (FIXED_1/200);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) os_data->avenrun[1] = avenrun[1] + (FIXED_1/200);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) os_data->avenrun[2] = avenrun[2] + (FIXED_1/200);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) j = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) for_each_online_cpu(i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) os_data->os_cpu[j].per_cpu_user =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_USER]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) os_data->os_cpu[j].per_cpu_nice =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_NICE]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) os_data->os_cpu[j].per_cpu_system =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) os_data->os_cpu[j].per_cpu_idle =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IDLE]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) os_data->os_cpu[j].per_cpu_irq =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IRQ]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) os_data->os_cpu[j].per_cpu_softirq =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) os_data->os_cpu[j].per_cpu_iowait =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IOWAIT]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) os_data->os_cpu[j].per_cpu_steal =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_STEAL]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) os_data->os_cpu[j].cpu_id = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) j++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) os_data->nr_cpus = j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) new_size = struct_size(os_data, os_cpu, os_data->nr_cpus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (ops.size != new_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (ops.active) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) rc = appldata_diag(APPLDATA_RECORD_OS_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) APPLDATA_START_INTERVAL_REC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) (unsigned long) ops.data, new_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) ops.mod_lvl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) pr_err("Starting a new OS data collection "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) "failed with rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) rc = appldata_diag(APPLDATA_RECORD_OS_ID,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) APPLDATA_STOP_REC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) (unsigned long) ops.data, ops.size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) ops.mod_lvl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) pr_err("Stopping a faulty OS data "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) "collection failed with rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) ops.size = new_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) os_data->timestamp = get_tod_clock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) os_data->sync_count_2++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * appldata_os_init()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * init data, register ops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static int __init appldata_os_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) int rc, max_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) max_size = struct_size(appldata_os_data, os_cpu, num_possible_cpus());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (max_size > APPLDATA_MAX_REC_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) pr_err("Maximum OS record size %i exceeds the maximum "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) "record size %i\n", max_size, APPLDATA_MAX_REC_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) appldata_os_data = kzalloc(max_size, GFP_KERNEL | GFP_DMA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if (appldata_os_data == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) appldata_os_data->per_cpu_size = sizeof(struct appldata_os_per_cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) appldata_os_data->cpu_offset = offsetof(struct appldata_os_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) os_cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) ops.data = appldata_os_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) ops.callback = &appldata_get_os_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) rc = appldata_register_ops(&ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) kfree(appldata_os_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * appldata_os_exit()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * unregister ops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) static void __exit appldata_os_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) appldata_unregister_ops(&ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) kfree(appldata_os_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) module_init(appldata_os_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) module_exit(appldata_os_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) MODULE_AUTHOR("Gerald Schaefer");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) MODULE_DESCRIPTION("Linux-VM Monitor Stream, OS statistics");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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