Ophestra
a4f7e92e1c
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The vm state is discarded often, and it is quite cumbersome to set everything up again when the shell history is gone. Signed-off-by: Ophestra <cat@gensokyo.uk>
29 lines
940 B
Nix
29 lines
940 B
Nix
{ lib, pkgs, ... }:
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let
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tracing = name: "\"/sys/kernel/debug/tracing/${name}\"";
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in
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{
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environment.systemPackages = [
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(pkgs.writeShellScriptBin "hakurei-set-up-tracing" ''
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set -e
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echo "$1" > ${tracing "set_graph_function"}
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echo function_graph > ${tracing "current_tracer"}
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echo funcgraph-tail > ${tracing "trace_options"}
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echo funcgraph-retval > ${tracing "trace_options"}
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echo nofuncgraph-cpu > ${tracing "trace_options"}
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echo nofuncgraph-overhead > ${tracing "trace_options"}
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echo nofuncgraph-duration > ${tracing "trace_options"}
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'')
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(pkgs.writeShellScriptBin "hakurei-print-trace" "exec cat ${tracing "trace"}")
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(pkgs.writeShellScriptBin "hakurei-consume-trace" "exec cat ${tracing "trace_pipe"}")
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];
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boot.kernelPatches = [
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{
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name = "funcgraph-retval";
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patch = null;
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extraStructuredConfig.FUNCTION_GRAPH_RETVAL = lib.kernel.yes;
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}
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];
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}
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