Userland: Move command-line utilities to Userland/Utilities/

2025-07-27 04:07:45 +00:00 · 2021-01-12 11:57:58 +01:00 · 2021-01-12 11:57:58 +01:00 · ececac65c2
commit ececac65c2
parent c4e2fd8123
142 changed files with 58 additions and 58 deletions
--- a/Userland/Utilities/allocate.cpp
+++ b/Userland/Utilities/allocate.cpp
@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <AK/Optional.h>
+#include <AK/String.h>
+#include <LibCore/ElapsedTimer.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+static void usage()
+{
+    printf("usage: allocate [number [unit (B/KiB/MiB)]]\n");
+    exit(1);
+}
+
+enum class Unit {
+    Bytes,
+    KiB,
+    MiB,
+};
+
+int main(int argc, char** argv)
+{
+    int count = 50;
+    auto unit = Unit::MiB;
+
+    if (argc >= 2) {
+        auto number = String(argv[1]).to_uint();
+        if (!number.has_value()) {
+            usage();
+        }
+        count = number.value();
+    }
+
+    if (argc >= 3) {
+        if (strcmp(argv[2], "B") == 0)
+            unit = Unit::Bytes;
+        else if (strcmp(argv[2], "KiB") == 0)
+            unit = Unit::KiB;
+        else if (strcmp(argv[2], "MiB") == 0)
+            unit = Unit::MiB;
+        else
+            usage();
+    }
+
+    switch (unit) {
+    case Unit::Bytes:
+        break;
+    case Unit::KiB:
+        count *= KiB;
+        break;
+    case Unit::MiB:
+        count *= MiB;
+        break;
+    }
+
+    Core::ElapsedTimer timer;
+
+    printf("allocating memory (%d bytes)...\n", count);
+    timer.start();
+    char* ptr = (char*)malloc(count);
+    if (!ptr) {
+        printf("failed.\n");
+        return 1;
+    }
+    printf("done in %dms\n", timer.elapsed());
+
+    auto pages = count / PAGE_SIZE;
+    auto step = pages / 10;
+
+    Core::ElapsedTimer timer2;
+
+    printf("writing one byte to each page of allocated memory...\n");
+    timer.start();
+    timer2.start();
+    for (int i = 0; i < pages; ++i) {
+        ptr[i * PAGE_SIZE] = 1;
+
+        if (i != 0 && (i % step) == 0) {
+            auto ms = timer2.elapsed();
+            if (ms == 0)
+                ms = 1;
+
+            auto bps = double(step * PAGE_SIZE) / (double(ms) / 1000);
+
+            printf("step took %dms (%fMiB/s)\n", ms, bps / MiB);
+
+            timer2.start();
+        }
+    }
+    printf("done in %dms\n", timer.elapsed());
+
+    printf("sleeping for ten seconds...\n");
+    for (int i = 0; i < 10; i++) {
+        printf("%d\n", i);
+        sleep(1);
+    }
+    printf("done.\n");
+
+    printf("freeing memory...\n");
+    timer.start();
+    free(ptr);
+    printf("done in %dms\n", timer.elapsed());
+
+    return 0;
+}