From ee3152b239c78ca8888a95b308eb6f0a4aaabe2f Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Tue, 2 Aug 2022 12:15:56 +0200
Subject: user/ansiterm: only write() the part of the framebuffer that changed
---
src/user/app/iostress/iostress.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
create mode 100644 src/user/app/iostress/iostress.c
(limited to 'src/user/app/iostress')
diff --git a/src/user/app/iostress/iostress.c b/src/user/app/iostress/iostress.c
new file mode 100644
index 0000000..843a19a
--- /dev/null
+++ b/src/user/app/iostress/iostress.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <camellia/syscalls.h>
+#include <x86intrin.h>
+
+#define NUM_RUNS 4
+#define NUM_CALLS 512
+
+int main(void) {
+ uint64_t time;
+ uint64_t results[8];
+
+ for (int i = 0; i < NUM_RUNS; i++) {
+ time = __rdtsc();
+ for (int j = 0; j < NUM_CALLS; j++)
+ _syscall_write(1, ".", 1, -1, 0);
+ _syscall_write(1, "\n", 1, -1, 0);
+ results[i] = __rdtsc() - time;
+ }
+
+ for (int i = 0; i < NUM_RUNS; i++) {
+ printf("run %x: %x\n", i, results[i] / 3000);
+ }
+
+ return 0;
+}
--
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