forked from lix-project/lix
* When NIX_SHOW_STATS=1, show the amount of stack space consumed by
the Nix expression evaluator.
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363e307fd3
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@ -362,8 +362,14 @@ Expr autoCallFunction(Expr e, const ATermMap & args)
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}
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}
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static char * deepestStack = (char *) -1; /* for measuring stack usage */
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Expr evalExpr2(EvalState & state, Expr e)
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Expr evalExpr2(EvalState & state, Expr e)
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{
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{
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char x;
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if (&x < deepestStack) deepestStack = &x;
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Expr e1, e2, e3, e4;
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Expr e1, e2, e3, e4;
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ATerm name, pos;
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ATerm name, pos;
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AFun sym = ATgetAFun(e);
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AFun sym = ATgetAFun(e);
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@ -752,12 +758,14 @@ extern "C" {
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void printEvalStats(EvalState & state)
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void printEvalStats(EvalState & state)
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{
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{
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char x;
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bool showStats = getEnv("NIX_SHOW_STATS", "0") != "0";
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bool showStats = getEnv("NIX_SHOW_STATS", "0") != "0";
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printMsg(showStats ? lvlInfo : lvlDebug,
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printMsg(showStats ? lvlInfo : lvlDebug,
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format("evaluated %1% expressions, %2% cache hits, %3%%% efficiency, used %4% ATerm bytes")
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format("evaluated %1% expressions, %2% cache hits, %3%%% efficiency, used %4% ATerm bytes, used %5% bytes of stack space")
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% state.nrEvaluated % state.nrCached
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% state.nrEvaluated % state.nrCached
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% ((float) state.nrCached / (float) state.nrEvaluated * 100)
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% ((float) state.nrCached / (float) state.nrEvaluated * 100)
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% AT_calcAllocatedSize());
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% AT_calcAllocatedSize()
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% (&x - deepestStack));
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if (showStats)
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if (showStats)
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printATermMapStats();
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printATermMapStats();
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}
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}
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