add real simple realloc benchmark

3 files changed, 78 insertions, 0 deletions

diff --git a/src/benchmarks/realloc.py b/src/benchmarks/realloc.py
new file mode 100644
index 0000000..d39c7a0
--- /dev/null
+++ b/src/benchmarks/realloc.py
@@ -0,0 +1,39 @@
+import matplotlib.pyplot as plt
+
+from src.benchmark import Benchmark
+
+
+class Benchmark_Realloc(Benchmark):
+    def __init__(self):
+        self.name = "realloc"
+        self.descrition = """Realloc 100 times"""
+
+        self.cmd = "realloc"
+
+        self.args = {"oneshot": [1]}
+
+        self.requirements = ["realloc"]
+        super().__init__()
+
+    def summary(self):
+        # bar plot
+        allocators = self.results["allocators"]
+
+        for i, allocator in enumerate(allocators):
+            y_vals = []
+            for perm in self.iterate_args(args=self.results["args"]):
+                y_vals.append(self.results["mean"][allocator][perm]["task-clock"])
+            x_vals = [i * x for x in range(1, len(y_vals) + 1)]
+            plt.bar(x_vals, y_vals, width=0.7, label=allocator, align="center",
+                    color=allocators[allocator]["color"])
+        
+        plt.legend()
+        plt.ylabel("task-clock in ms")
+        plt.title("realloc micro bench")
+        plt.savefig(self.name + ".png")
+        plt.clf()
+
+        self.export_to_csv(datapoints=["task-clock"])
+
+
+realloc = Benchmark_Realloc()
diff --git a/src/benchmarks/realloc/Makefile b/src/benchmarks/realloc/Makefile
new file mode 100644
index 0000000..66b38ca
--- /dev/null
+++ b/src/benchmarks/realloc/Makefile
@@ -0,0 +1,25 @@
+OBJDIR ?= obj
+
+CC ?= gcc
+
+WARNFLAGS ?= -Wall -Wextra
+COMMONFLAGS ?= -fno-builtin -fPIC -DPIC -pthread
+OPTFLAGS ?= -O3 -DNDEBUG
+
+CFLAGS ?= $(OPTFLAGS) $(WARNFLAGS) $(COMMONFLAGS)
+
+LDFLAGS ?= -pthread -static-libgcc
+
+.PHONY = all clean
+
+all: $(OBJDIR)/realloc
+
+$(OBJDIR)/realloc: realloc.c | $(OBJDIR)
+	@echo compiling $@...
+	$(CC) $(LDFLAGS) $(CFLAGS) -o $@ $<
+
+$(OBJDIR):
+	mkdir -p $@
+
+clean:
+	rm -rf $(OBJDIR)
diff --git a/src/benchmarks/realloc/realloc.c b/src/benchmarks/realloc/realloc.c
new file mode 100644
index 0000000..2eddc26
--- /dev/null
+++ b/src/benchmarks/realloc/realloc.c
@@ -0,0 +1,14 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+size_t* array;
+size_t steps = 1;
+int main() {
+	for (int i = 0; i < 100; i++) {
+		if ((array = realloc(array, sizeof(size_t) * steps * i)) == NULL) {
+			perror("realloc");
+			return 1;
+		}
+	}
+	return 0;
+}