1 // SPDX-License-Identifier: GPL-2.0
3  * Data gathering module for Linux-VM Monitor Stream, Stage 1.
4  * Collects misc. OS related data (CPU utilization, running processes).
29  * OS data
31  * This is accessed as binary data by z/VM. If changes to it can't be avoided,
54 	u32 sync_count_1;	/* after VM collected the record data, */
58 				   (possibly corrupt) data */
61 	u32 per_cpu_size;	/* size of the per-cpu data struct */
62 	u32 cpu_offset;		/* offset of the first per-cpu data struct */
73 	/* per cpu data */
80 	.name	   = "os",
90  * gather OS data
92 static void appldata_get_os_data(void *data)  in appldata_get_os_data()  argument
98 	os_data = data;  in appldata_get_os_data()
99 	os_data->sync_count_1++;  in appldata_get_os_data()
101 	os_data->nr_threads = nr_threads;  in appldata_get_os_data()
102 	os_data->nr_running = nr_running();  in appldata_get_os_data()
103 	os_data->nr_iowait  = nr_iowait();  in appldata_get_os_data()
104 	os_data->avenrun[0] = avenrun[0] + (FIXED_1/200);  in appldata_get_os_data()
105 	os_data->avenrun[1] = avenrun[1] + (FIXED_1/200);  in appldata_get_os_data()
106 	os_data->avenrun[2] = avenrun[2] + (FIXED_1/200);  in appldata_get_os_data()
110 		os_data->os_cpu[j].per_cpu_user =  in appldata_get_os_data()
112 		os_data->os_cpu[j].per_cpu_nice =  in appldata_get_os_data()
114 		os_data->os_cpu[j].per_cpu_system =  in appldata_get_os_data()
116 		os_data->os_cpu[j].per_cpu_idle =  in appldata_get_os_data()
118 		os_data->os_cpu[j].per_cpu_irq =  in appldata_get_os_data()
120 		os_data->os_cpu[j].per_cpu_softirq =  in appldata_get_os_data()
122 		os_data->os_cpu[j].per_cpu_iowait =  in appldata_get_os_data()
124 		os_data->os_cpu[j].per_cpu_steal =  in appldata_get_os_data()
126 		os_data->os_cpu[j].cpu_id = i;  in appldata_get_os_data()
130 	os_data->nr_cpus = j;  in appldata_get_os_data()
132 	new_size = struct_size(os_data, os_cpu, os_data->nr_cpus);  in appldata_get_os_data()
137 					   (unsigned long) ops.data, new_size,  in appldata_get_os_data()
140 				pr_err("Starting a new OS data collection "  in appldata_get_os_data()
145 					   (unsigned long) ops.data, ops.size,  in appldata_get_os_data()
148 				pr_err("Stopping a faulty OS data "  in appldata_get_os_data()
153 	os_data->timestamp = get_tod_clock();  in appldata_get_os_data()
154 	os_data->sync_count_2++;  in appldata_get_os_data()
161  * init data, register ops
169 		pr_err("Maximum OS record size %i exceeds the maximum "  in appldata_os_init()
171 		rc = -ENOMEM;  in appldata_os_init()
177 		rc = -ENOMEM;  in appldata_os_init()
181 	appldata_os_data->per_cpu_size = sizeof(struct appldata_os_per_cpu);  in appldata_os_init()
182 	appldata_os_data->cpu_offset   = offsetof(struct appldata_os_data,  in appldata_os_init()
185 	ops.data = appldata_os_data;  in appldata_os_init()
211 MODULE_DESCRIPTION("Linux-VM Monitor Stream, OS statistics");