benchmarks: align read_buf to cache line

src/benchmark/CodepointWidth.zig

@@ -107,7 +107,7 @@ fn stepWcwidth(ptr: *anyopaque) Benchmark.Error!void {
     const self: *CodepointWidth = @ptrCast(@alignCast(ptr));
 
     const f = self.data_f orelse return;
-    var read_buf: [4096]u8 = undefined;
+    var read_buf: [4096]u8 align(std.atomic.cache_line) = undefined;
     var f_reader = f.reader(&read_buf);
     var r = &f_reader.interface;
 
@@ -134,7 +134,7 @@ fn stepTable(ptr: *anyopaque) Benchmark.Error!void {
     const self: *CodepointWidth = @ptrCast(@alignCast(ptr));
 
     const f = self.data_f orelse return;
-    var read_buf: [4096]u8 = undefined;
+    var read_buf: [4096]u8 align(std.atomic.cache_line) = undefined;
     var f_reader = f.reader(&read_buf);
     var r = &f_reader.interface;
 
@@ -166,7 +166,7 @@ fn stepSimd(ptr: *anyopaque) Benchmark.Error!void {
     const self: *CodepointWidth = @ptrCast(@alignCast(ptr));
 
     const f = self.data_f orelse return;
-    var read_buf: [4096]u8 = undefined;
+    var read_buf: [4096]u8 align(std.atomic.cache_line) = undefined;
     var f_reader = f.reader(&read_buf);
     var r = &f_reader.interface;
 

src/benchmark/GraphemeBreak.zig

@@ -90,7 +90,7 @@ fn stepNoop(ptr: *anyopaque) Benchmark.Error!void {
     const self: *GraphemeBreak = @ptrCast(@alignCast(ptr));
 
     const f = self.data_f orelse return;
-    var read_buf: [4096]u8 = undefined;
+    var read_buf: [4096]u8 align(std.atomic.cache_line) = undefined;
     var f_reader = f.reader(&read_buf);
     var r = &f_reader.interface;
 
@@ -113,7 +113,7 @@ fn stepTable(ptr: *anyopaque) Benchmark.Error!void {
     const self: *GraphemeBreak = @ptrCast(@alignCast(ptr));
 
     const f = self.data_f orelse return;
-    var read_buf: [4096]u8 = undefined;
+    var read_buf: [4096]u8 align(std.atomic.cache_line) = undefined;
     var f_reader = f.reader(&read_buf);
     var r = &f_reader.interface;
 

src/benchmark/IsSymbol.zig

@@ -90,7 +90,7 @@ fn stepUucode(ptr: *anyopaque) Benchmark.Error!void {
     const self: *IsSymbol = @ptrCast(@alignCast(ptr));
 
     const f = self.data_f orelse return;
-    var read_buf: [4096]u8 = undefined;
+    var read_buf: [4096]u8 align(std.atomic.cache_line) = undefined;
     var f_reader = f.reader(&read_buf);
     var r = &f_reader.interface;
 
@@ -117,7 +117,7 @@ fn stepTable(ptr: *anyopaque) Benchmark.Error!void {
     const self: *IsSymbol = @ptrCast(@alignCast(ptr));
 
     const f = self.data_f orelse return;
-    var read_buf: [4096]u8 = undefined;
+    var read_buf: [4096]u8 align(std.atomic.cache_line) = undefined;
     var f_reader = f.reader(&read_buf);
     var r = &f_reader.interface;
 

src/benchmark/ScreenClone.zig

@@ -109,7 +109,7 @@ fn setup(ptr: *anyopaque) Benchmark.Error!void {
     var stream = self.terminal.vtStream();
     defer stream.deinit();
 
-    var read_buf: [4096]u8 = undefined;
+    var read_buf: [4096]u8 align(std.atomic.cache_line) = undefined;
     var f_reader = data_f.reader(&read_buf);
     const r = &f_reader.interface;
 

src/benchmark/TerminalParser.zig

@@ -75,7 +75,7 @@ fn step(ptr: *anyopaque) Benchmark.Error!void {
     // the benchmark results and... I know writing this that we
     // aren't currently IO bound.
     const f = self.data_f orelse return;
-    var read_buf: [4096]u8 = undefined;
+    var read_buf: [4096]u8 align(std.atomic.cache_line) = undefined;
     var f_reader = f.reader(&read_buf);
     var r = &f_reader.interface;
 

src/benchmark/TerminalStream.zig

@@ -114,7 +114,7 @@ fn step(ptr: *anyopaque) Benchmark.Error!void {
     // aren't currently IO bound.
     const f = self.data_f orelse return;
 
-    var read_buf: [4096]u8 = undefined;
+    var read_buf: [4096]u8 align(std.atomic.cache_line) = undefined;
     var f_reader = f.reader(&read_buf);
     const r = &f_reader.interface;