Same for all bench, nbo more sink
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adrien
parent
d96a1ac4bc
commit
cc39c1a6f4
@ -173,8 +173,6 @@ fn bench_vsNative(writer: *std.Io.Writer) !void {
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const TNames = .{ "i32", "i64", "i128", "f32", "f64" };
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const Ops = .{ "add", "mulBy", "divBy" };
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var gsink: f64 = 0;
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try writer.print(
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\\
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\\ Scalar vs Native Overhead Analysis
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@ -193,45 +191,39 @@ fn bench_vsNative(writer: *std.Io.Writer) !void {
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const M = Scalar(T, .init(.{ .L = 1 }), .init(.{}));
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const S = Scalar(T, .init(.{ .T = 1 }), .init(.{}));
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for (0..SAMPLES) |_| {
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// --- 1. Benchmark Native ---
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var n_sink: T = 0;
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const n_start = getTime();
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for (0..ITERS) |i| {
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const a = getValT(T, i);
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const b = getValT(T, 2);
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const r = if (comptime std.mem.eql(u8, op_name, "add"))
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a + b
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else if (comptime std.mem.eql(u8, op_name, "mulBy"))
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a * b
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else if (comptime @typeInfo(T) == .int) @divTrunc(a, b) else a / b;
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std.mem.doNotOptimizeAway({
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for (0..SAMPLES) |_| {
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// --- 1. Benchmark Native ---
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const n_start = getTime();
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for (0..ITERS) |i| {
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const a = getValT(T, i);
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const b = getValT(T, 2);
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_ = if (comptime std.mem.eql(u8, op_name, "add"))
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a + b
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else if (comptime std.mem.eql(u8, op_name, "mulBy"))
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a * b
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else if (comptime @typeInfo(T) == .int) @divTrunc(a, b) else a / b;
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}
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const n_end = getTime();
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native_total_ns += @as(f64, @floatFromInt(n_start.durationTo(n_end).toNanoseconds()));
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if (comptime @typeInfo(T) == .float) n_sink += r else n_sink ^= r;
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// --- 2. Benchmark Scalar ---
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const q_start = getTime();
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for (0..ITERS) |i| {
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const qa = M{ .value = getValT(T, i) };
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const qb = if (comptime std.mem.eql(u8, op_name, "divBy")) S{ .value = getValT(T, 2) } else M{ .value = getValT(T, 2) };
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_ = if (comptime std.mem.eql(u8, op_name, "add"))
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qa.add(qb)
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else if (comptime std.mem.eql(u8, op_name, "mulBy"))
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qa.mulBy(qb)
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else
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qa.divBy(qb);
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}
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const q_end = getTime();
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quantity_total_ns += @as(f64, @floatFromInt(q_start.durationTo(q_end).toNanoseconds()));
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}
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const n_end = getTime();
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native_total_ns += @as(f64, @floatFromInt(n_start.durationTo(n_end).toNanoseconds()));
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fold(T, &gsink, n_sink);
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// --- 2. Benchmark Scalar ---
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var q_sink: T = 0;
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const q_start = getTime();
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for (0..ITERS) |i| {
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const qa = M{ .value = getValT(T, i) };
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const qb = if (comptime std.mem.eql(u8, op_name, "divBy")) S{ .value = getValT(T, 2) } else M{ .value = getValT(T, 2) };
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const r = if (comptime std.mem.eql(u8, op_name, "add"))
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qa.add(qb)
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else if (comptime std.mem.eql(u8, op_name, "mulBy"))
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qa.mulBy(qb)
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else
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qa.divBy(qb);
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if (comptime @typeInfo(T) == .float) q_sink += r.value else q_sink ^= r.value;
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}
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const q_end = getTime();
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quantity_total_ns += @as(f64, @floatFromInt(q_start.durationTo(q_end).toNanoseconds()));
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fold(T, &gsink, q_sink);
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}
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});
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const avg_n = (native_total_ns / SAMPLES) / @as(f64, @floatFromInt(ITERS));
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const avg_q = (quantity_total_ns / SAMPLES) / @as(f64, @floatFromInt(ITERS));
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@ -245,8 +237,6 @@ fn bench_vsNative(writer: *std.Io.Writer) !void {
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}
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try writer.print("└───────────┴──────┴───────────┴───────────┴───────────┘\n", .{});
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try writer.print("\nAnti-optimisation sink: {d:.4}\n", .{gsink});
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try std.testing.expect(gsink != 0);
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}
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fn bench_crossTypeVsNative(writer: *std.Io.Writer) !void {
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@ -280,8 +270,6 @@ fn bench_crossTypeVsNative(writer: *std.Io.Writer) !void {
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const TNames = .{ "i16", "i64", "i128", "f32", "f64" };
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const Ops = .{ "add", "mulBy", "divBy" };
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var gsink: f64 = 0;
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try writer.print(
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\\
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\\ Cross-Type Overhead Analysis: Scalar vs Native
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@ -302,60 +290,54 @@ fn bench_crossTypeVsNative(writer: *std.Io.Writer) !void {
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const M2 = Scalar(T2, .init(.{ .L = 1 }), .init(.{}));
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const S2 = Scalar(T2, .init(.{ .T = 1 }), .init(.{}));
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for (0..SAMPLES) |_| {
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// --- 1. Benchmark Native (Cast T2 to T1, then math) ---
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var n_sink: T1 = 0;
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const n_start = getTime();
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for (0..ITERS) |i| {
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const a = getValT(T1, i);
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const b_raw = getValT(T2, 2);
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const b = castTo(T1, T2, b_raw);
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std.mem.doNotOptimizeAway({
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for (0..SAMPLES) |_| {
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// --- 1. Benchmark Native (Cast T2 to T1, then math) ---
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const n_start = getTime();
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for (0..ITERS) |i| {
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const a = getValT(T1, i);
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const b_raw = getValT(T2, 2);
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const b = castTo(T1, T2, b_raw);
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const r = if (comptime std.mem.eql(u8, op_name, "add"))
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a + b
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else if (comptime std.mem.eql(u8, op_name, "mulBy"))
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a * b
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else if (comptime @typeInfo(T1) == .int)
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@divTrunc(a, b)
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else
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a / b;
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_ = if (comptime std.mem.eql(u8, op_name, "add"))
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a + b
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else if (comptime std.mem.eql(u8, op_name, "mulBy"))
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a * b
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else if (comptime @typeInfo(T1) == .int)
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@divTrunc(a, b)
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else
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a / b;
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}
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const n_end = getTime();
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native_total_ns += @as(f64, @floatFromInt(n_start.durationTo(n_end).toNanoseconds()));
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if (comptime @typeInfo(T1) == .float) n_sink += r else n_sink ^= r;
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// --- 2. Benchmark Scalar ---
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const q_start = getTime();
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for (0..ITERS) |i| {
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const qa = M1{ .value = getValT(T1, i) };
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const qb = if (comptime std.mem.eql(u8, op_name, "divBy"))
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S2{ .value = getValT(T2, 2) }
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else
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M2{ .value = getValT(T2, 2) };
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_ = if (comptime std.mem.eql(u8, op_name, "add"))
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qa.add(qb)
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else if (comptime std.mem.eql(u8, op_name, "mulBy"))
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qa.mulBy(qb)
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else
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qa.divBy(qb);
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}
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const q_end = getTime();
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quantity_total_ns += @as(f64, @floatFromInt(q_start.durationTo(q_end).toNanoseconds()));
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}
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const n_end = getTime();
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native_total_ns += @as(f64, @floatFromInt(n_start.durationTo(n_end).toNanoseconds()));
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fold(T1, &gsink, n_sink);
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// --- 2. Benchmark Scalar ---
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var q_sink: T1 = 0;
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const q_start = getTime();
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for (0..ITERS) |i| {
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const qa = M1{ .value = getValT(T1, i) };
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const qb = if (comptime std.mem.eql(u8, op_name, "divBy"))
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S2{ .value = getValT(T2, 2) }
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else
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M2{ .value = getValT(T2, 2) };
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const avg_n = (native_total_ns / SAMPLES) / @as(f64, @floatFromInt(ITERS));
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const avg_q = (quantity_total_ns / SAMPLES) / @as(f64, @floatFromInt(ITERS));
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const slowdown = avg_q / avg_n;
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const r = if (comptime std.mem.eql(u8, op_name, "add"))
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qa.add(qb)
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else if (comptime std.mem.eql(u8, op_name, "mulBy"))
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qa.mulBy(qb)
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else
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qa.divBy(qb);
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if (comptime @typeInfo(T1) == .float) q_sink += r.value else q_sink ^= r.value;
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}
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const q_end = getTime();
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quantity_total_ns += @as(f64, @floatFromInt(q_start.durationTo(q_end).toNanoseconds()));
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fold(T1, &gsink, q_sink);
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}
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const avg_n = (native_total_ns / SAMPLES) / @as(f64, @floatFromInt(ITERS));
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const avg_q = (quantity_total_ns / SAMPLES) / @as(f64, @floatFromInt(ITERS));
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const slowdown = avg_q / avg_n;
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try writer.print("│ {s:<7} │ {s:<4} │ {s:<4} │ {d:>7.2}ns │ {d:>7.2}ns │ {d:>8.2}x │\n", .{
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op_name, TNames[t1_idx], TNames[t2_idx], avg_n, avg_q, slowdown,
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try writer.print("│ {s:<7} │ {s:<4} │ {s:<4} │ {d:>7.2}ns │ {d:>7.2}ns │ {d:>8.2}x │\n", .{
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op_name, TNames[t1_idx], TNames[t2_idx], avg_n, avg_q, slowdown,
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});
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});
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}
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}
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@ -365,14 +347,11 @@ fn bench_crossTypeVsNative(writer: *std.Io.Writer) !void {
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}
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try writer.print("└─────────┴──────┴──────┴───────────┴───────────┴───────────┘\n", .{});
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try writer.print("\nAnti-optimisation sink: {d:.4}\n", .{gsink});
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try std.testing.expect(gsink != 0);
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}
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fn bench_Vector(writer: *std.Io.Writer) !void {
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const ITERS: usize = 10_000;
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const SAMPLES: usize = 10;
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var gsink: f64 = 0;
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const getVal = struct {
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fn f(comptime TT: type, i: usize, comptime mask: u7) TT {
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@ -420,44 +399,33 @@ fn bench_Vector(writer: *std.Io.Writer) !void {
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var samples: [SAMPLES]f64 = undefined;
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for (0..SAMPLES) |s_idx| {
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var sink: T = 0;
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std.mem.doNotOptimizeAway({
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for (0..SAMPLES) |s_idx| {
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const t_start = getTime();
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for (0..ITERS) |i| {
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const v1 = V.initDefault(getVal(T, i, 63));
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const t_start = getTime();
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for (0..ITERS) |i| {
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const v1 = V.initDefault(getVal(T, i, 63));
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if (comptime std.mem.eql(u8, op_name, "add")) {
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const v2 = V.initDefault(getVal(T, i +% 7, 63));
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const res = v1.add(v2);
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for (res.data) |val| {
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if (comptime @typeInfo(T) == .float) sink += val else sink ^= val;
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if (comptime std.mem.eql(u8, op_name, "add")) {
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const v2 = V.initDefault(getVal(T, i +% 7, 63));
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_ = v1.add(v2);
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} else if (comptime std.mem.eql(u8, op_name, "scale")) {
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const sc = getVal(T, i +% 2, 63);
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_ = v1.scale(sc);
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} else if (comptime std.mem.eql(u8, op_name, "mulByScalar")) {
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const s_val = Q_time{ .value = getVal(T, i +% 2, 63) };
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_ = v1.mulByScalar(s_val);
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} else if (comptime std.mem.eql(u8, op_name, "length")) {
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_ = v1.length();
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}
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} else if (comptime std.mem.eql(u8, op_name, "scale")) {
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const sc = getVal(T, i +% 2, 63);
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const res = v1.scale(sc);
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for (res.data) |val| {
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if (comptime @typeInfo(T) == .float) sink += val else sink ^= val;
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}
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} else if (comptime std.mem.eql(u8, op_name, "mulByScalar")) {
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const s_val = Q_time{ .value = getVal(T, i +% 2, 63) };
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const res = v1.mulByScalar(s_val);
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for (res.data) |val| {
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if (comptime @typeInfo(T) == .float) sink += val else sink ^= val;
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}
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} else if (comptime std.mem.eql(u8, op_name, "length")) {
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const r = v1.length();
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if (comptime @typeInfo(T) == .float) sink += r else sink ^= r;
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}
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const t_end = getTime();
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samples[s_idx] = @as(f64, @floatFromInt(t_start.durationTo(t_end).toNanoseconds()));
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}
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const t_end = getTime();
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samples[s_idx] = @as(f64, @floatFromInt(t_start.durationTo(t_end).toNanoseconds()));
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fold(T, &gsink, sink);
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}
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const median_ns_per_op = computeStats(&samples, ITERS);
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try writer.print(" {d:>7.1} │", .{median_ns_per_op});
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const median_ns_per_op = computeStats(&samples, ITERS);
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try writer.print(" {d:>7.1} │", .{median_ns_per_op});
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});
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}
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try writer.print("\n", .{});
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}
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@ -467,6 +435,4 @@ fn bench_Vector(writer: *std.Io.Writer) !void {
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}
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}
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try writer.print("└─────────────┴──────┴─────────┴─────────┴─────────┘\n", .{});
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try writer.print("\nAnti-optimisation sink: {d:.4}\n", .{gsink});
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try std.testing.expect(gsink != 0);
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}
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