Brandon Potter has submitted this change. (
https://gem5-review.googlesource.com/c/public/gem5/+/22303 )
Change subject: cpu-o3,tests: add page boundary access test
......................................................................
cpu-o3,tests: add page boundary access test
The O3 model supports unaligned accesses across page boundaries.
This changeset provides a stress test for the feature.
Other benchmarks exercise it, but their coverage is spotty. This
test does nothing else except poke bytes which straddle page
boundaries.
Change-Id: Ic20c2862bcb7af7be091030c12916ba499db10c7
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/22303
Tested-by: kokoro <[email protected]>
Reviewed-by: Jason Lowe-Power <[email protected]>
Maintainer: Jason Lowe-Power <[email protected]>
---
A tests/test-progs/page-access-wrap/Makefile
A tests/test-progs/page-access-wrap/page-access-wrap.cpp
2 files changed, 87 insertions(+), 0 deletions(-)
Approvals:
Jason Lowe-Power: Looks good to me, approved; Looks good to me, approved
kokoro: Regressions pass
diff --git a/tests/test-progs/page-access-wrap/Makefile
b/tests/test-progs/page-access-wrap/Makefile
new file mode 100644
index 0000000..41e7a18
--- /dev/null
+++ b/tests/test-progs/page-access-wrap/Makefile
@@ -0,0 +1,20 @@
+
+CPP := g++
+
+TEST_OBJS := page-access-wrap.o
+TEST_PROGS := $(TEST_OBJS:.o=)
+
+# ==== Rules
==================================================================
+
+.PHONY: default clean
+
+default: $(TEST_PROGS)
+
+clean:
+ $(RM) $(TEST_OBJS) $(TEST_PROGS)
+
+$(TEST_PROGS): $(TEST_OBJS)
+ $(CPP) -static -o $@ [email protected]
+
+%.o: %.c Makefile
+ $(CPP) -c -o $@ $*.c -msse3
diff --git a/tests/test-progs/page-access-wrap/page-access-wrap.cpp
b/tests/test-progs/page-access-wrap/page-access-wrap.cpp
new file mode 100644
index 0000000..d4cc75e
--- /dev/null
+++ b/tests/test-progs/page-access-wrap/page-access-wrap.cpp
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2019 Advanced Micro Devices, Inc.
+ * All rights reserved.
+ *
+ * For use for simulation and test purposes only
+ *
+ * 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.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its
+ * contributors may be used to endorse or promote products derived from
this
+ * software without specific prior written permission.
+ *
+ * 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.
+ *
+ * Authors: Brandon Potter
+ */
+
+#include <sys/mman.h>
+
+#include <cstdint>
+#include <cstdio>
+#include <cstdlib>
+#include <ctime>
+
+int main(void)
+{
+ uint64_t page_size = 0x1000;
+ uint64_t num_pages = 0x10000;
+ uint64_t length = page_size * num_pages;
+
+ void *raw = mmap(NULL, length, PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1,
0);
+ uint8_t *mem = reinterpret_cast<uint8_t*>(raw);
+
+ srand(0xABCD);
+
+ uint64_t last_byte = page_size - 1;
+ uint64_t page_boundaries = num_pages - 1;
+
+ for (int i = 0; i < 2000; i++) {
+ uint64_t random_boundary = rand() % page_boundaries;
+ uint64_t boundary_offset = random_boundary * page_size;
+ uint64_t boundary_last_byte = boundary_offset + last_byte;
+ uint32_t *poke = reinterpret_cast<uint32_t*>(mem +
boundary_last_byte);
+ printf("%p\n", poke);
+ uint32_t value = *poke;
+ }
+
+ return 0;
+}
--
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Gerrit-Project: public/gem5
Gerrit-Branch: master
Gerrit-Change-Id: Ic20c2862bcb7af7be091030c12916ba499db10c7
Gerrit-Change-Number: 22303
Gerrit-PatchSet: 4
Gerrit-Owner: Brandon Potter <[email protected]>
Gerrit-Reviewer: Bobby R. Bruce <[email protected]>
Gerrit-Reviewer: Brandon Potter <[email protected]>
Gerrit-Reviewer: Jason Lowe-Power <[email protected]>
Gerrit-Reviewer: kokoro <[email protected]>
Gerrit-MessageType: merged
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