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52 lines
1.7 KiB
Python
Executable File
52 lines
1.7 KiB
Python
Executable File
#!/usr/bin/env drgn
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# Copyright (c) SUSE Linux.
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# SPDX-License-Identifier: LGPL-2.1-or-later
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"""Dump /proc/vmstat statistics."""
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from drgn.helpers.linux.cpumask import for_each_online_cpu
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from drgn.helpers.linux.percpu import per_cpu
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def print_event_line(event, counter):
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print(f"{event.name:<36} {counter.value_():>16}")
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print(f"{'Event':<36} {'Count':>16}")
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# For all of the below, we skip the last enumerator item as it holds the number
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# of enumerators.
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# 1) vm_zone_stat statistics are there since v4.8.
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if "vm_zone_stat" in prog:
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print("VM_ZONE_STAT:")
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vm_zone_stat = prog["vm_zone_stat"]
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for event in prog.type("enum zone_stat_item").enumerators[:-1]:
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print_event_line(event, vm_zone_stat[event.value].counter)
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print()
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# 2) vm_node_stat statistics are there since v4.8.
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if "vm_node_stat" in prog:
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print("VM_NODE_STAT:")
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vm_node_stat = prog["vm_node_stat"]
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for event in prog.type("enum node_stat_item").enumerators[:-1]:
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print_event_line(event, vm_node_stat[event.value].counter)
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print()
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# 3) vm_numa_event statistics are there since v5.14. They are only populated if
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# CONFIG_NUMA is enabled.
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if "node_subsys" in prog and "vm_numa_event" in prog:
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print("VM_NUMA_EVENT:")
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vm_numa_event = prog["vm_numa_event"]
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for event in prog.type("enum numa_stat_item").enumerators[:-1]:
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print_event_line(event, vm_numa_event[event.value].counter)
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print()
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# 4) vm_event_states statistics (uses per-CPU counters)
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print("VM_EVENT_STATES:")
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vm_event_states = prog["vm_event_states"]
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cpulist = list(for_each_online_cpu(prog))
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for event in prog.type("enum vm_event_item").enumerators[:-1]:
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count = sum([per_cpu(vm_event_states, cpu).event[event.value] for cpu in cpulist])
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print_event_line(event, count)
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