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Kernel+lsirq: Track per-CPU IRQ handler call counts
Each GenericInterruptHandler now tracks the number of calls that each CPU has serviced. This takes care of a FIXME in the /sys/kernel/interrupts generator. Also, the lsirq command line tool now displays per-CPU call counts.
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4 changed files with 33 additions and 9 deletions
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@ -1,5 +1,6 @@
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/*
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* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
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* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -34,9 +35,12 @@ ErrorOr<void> SysFSInterrupts::try_generate(KBufferBuilder& builder)
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TRY(obj.add("purpose"sv, handler.purpose()));
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TRY(obj.add("interrupt_line"sv, handler.interrupt_number()));
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TRY(obj.add("controller"sv, handler.controller()));
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TRY(obj.add("cpu_handler"sv, 0)); // FIXME: Determine the responsible CPU for each interrupt handler.
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TRY(obj.add("device_sharing"sv, (unsigned)handler.sharing_devices_count()));
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TRY(obj.add("call_count"sv, handler.call_count()));
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auto per_cpu_call_counts = TRY(obj.add_array("per_cpu_call_counts"sv));
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for (auto call_count : handler.per_cpu_call_counts()) {
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TRY(per_cpu_call_counts.add(call_count));
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}
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TRY(per_cpu_call_counts.finish());
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TRY(obj.finish());
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return {};
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})();
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