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benchmarks: support test-tlb
This commit added support for test-tlb, a memory latency micro-benchmark. Signed-off-by: ouyangxiangzhen <[email protected]>
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‎benchmarks/test-tlb/0001-test-tlb-port-for-NuttX.patch

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From fe4108f726a0e30d429f031a6006f030c5eda113 Mon Sep 17 00:00:00 2001
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From: ouyangxiangzhen <[email protected]>
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Date: Thu, 6 Jun 2024 19:53:37 +0800
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Subject: [PATCH] test-tlb: port for NuttX
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VELAPLATFO-25227
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This commit ports the test-tlb test program to the NuttX. Additionally, it implements dynamic CPU frequency calculation.
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Change-Id: If1c15f36742d7ee5a7d13147b41b3372047dad08
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Signed-off-by: ouyangxiangzhen <[email protected]>
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---
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test-tlb.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++----
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1 file changed, 63 insertions(+), 5 deletions(-)
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diff --git a/test-tlb.c b/test-tlb.c
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index 5c8aaa5..767794a 100644
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--- a/test-tlb.c
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+++ b/test-tlb.c
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@@ -14,13 +14,58 @@
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#include <math.h>
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#include <time.h>
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-#define PAGE_SIZE 4096
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-
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-#define FREQ 3.9
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static int test_hugepage = 0;
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static int random_list = 0;
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+/* Fix definition conflict */
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+#ifndef PAGE_SIZE
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+#define PAGE_SIZE 4096
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+#endif
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+
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+/* dynamic calculate freq */
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+#define MEASURE_GAP 500000
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+
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+#ifdef __x86_64__
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+static inline unsigned long rdcnt_relax(void)
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+{
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+ unsigned int lo,hi;
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+ asm volatile ("rdtsc" : "=a" (lo), "=d" (hi));
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+ return ((unsigned long)hi << 32) | (unsigned long)lo;
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+}
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+#elif defined(__aarch64__)
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+static inline unsigned long rdcnt_relax(void)
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+{
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+ unsigned long time;
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+ asm volatile("mrs %0, cntvct_el0" : "=r"(time));
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+ return time;
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+}
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+#else
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+#error "Unsupported architecture for dynamic frequencies measuring"
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+#endif
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+
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+static inline unsigned long rdcnt(void)
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+{
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+ return rdcnt_relax();
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+}
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+
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+static unsigned long measure_freq(void)
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+{
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+ unsigned long cycles_per_useconds;
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+ unsigned long start;
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+ unsigned long end;
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+
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+ start = rdcnt();
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+ usleep(MEASURE_GAP);
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+ end = rdcnt();
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+
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+ cycles_per_useconds = (end - start) / MEASURE_GAP;
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+
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+ printf("cycles_per_microseconds: %lu\n", cycles_per_useconds);
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+
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+ return cycles_per_useconds;
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+}
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+
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static void die(const char *fmt, ...)
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{
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va_list argp;
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@@ -69,7 +114,7 @@ static unsigned long warmup(void *map)
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static double do_test(void *map)
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{
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- unsigned long count = 0, offset = 0, usec;
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+ unsigned long volatile count = 0, offset = 0, usec;
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struct timeval start, end;
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struct itimerval itval = {
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.it_interval = { 0, 0 },
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@@ -190,7 +235,14 @@ static void *create_map(void *map, unsigned long size, unsigned long stride)
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if (map) {
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if (test_hugepage)
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return map;
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+
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+#ifdef __NuttX__
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+ if (munmap(map, size) != 0)
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+ die("munmap failed\n");
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+ map = NULL;
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+#else
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flags |= MAP_FIXED;
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+#endif
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}
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mapsize = size;
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@@ -237,9 +289,14 @@ int main(int argc, char **argv)
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const char *arg;
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void *map;
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double cycles;
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+ unsigned long freq;
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srandom(time(NULL));
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+ /* Fix segmentation fault when execution without any arguments in NuttX */
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+ if (argc < 3)
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+ die("bad arguments: test-tlb [-H] <size> <stride>");
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+
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while ((arg = argv[1]) != NULL) {
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if (*arg != '-')
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break;
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@@ -261,6 +318,7 @@ int main(int argc, char **argv)
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argv++;
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}
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+ freq = measure_freq();
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size = get_num(argv[1]);
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stride = get_num(argv[2]);
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if (stride < 4 || size < stride)
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@@ -281,6 +339,6 @@ int main(int argc, char **argv)
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}
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printf("%6.2fns (~%.1f cycles)\n",
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- cycles, cycles*FREQ);
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+ cycles, cycles * freq);
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return 0;
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}
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--
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2.34.1
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‎benchmarks/test-tlb/CMakeLists.txt

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#
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# Copyright (C) 2024 Xiaomi Corporation
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may not
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# use this file except in compliance with the License. You may obtain a copy of
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# the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations under
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# the License.
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#
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if(CONFIG_BENCHMARK_TESTTLB)
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set(SRCS test-tlb/test-tlb.c)
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set(TESTTLB_UNPACK ${CMAKE_CURRENT_LIST_DIR}/test-tlb)
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set(TESTTLB_URL https://github.com/torvalds/test-tlb/archive)
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set(TESTTLB_ZIP master.zip)
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if(NOT EXISTS ${TESTTLB_UNPACK})
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FetchContent_Declare(
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testtlb_fetch
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URL ${TESTTLB_URL}/${TESTTLB_ZIP} SOURCE_DIR ${TESTTLB_UNPACK} BINARY_DIR
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${CMAKE_BINARY_DIR}/apps/benchmarks/test-tlb/test-tlb
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PATCH_COMMAND patch -p0 -d ${CMAKE_CURRENT_LIST_DIR} <
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${CMAKE_CURRENT_LIST_DIR}/0001-test-tlb-port-for-NuttX.patch
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DOWNLOAD_NO_PROGRESS true
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TIMEOUT 30)
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FetchContent_GetProperties(testtlb_fetch)
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if(NOT testtlb_fetch_POPULATED)
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FetchContent_Populate(testtlb_fetch)
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endif()
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endif()
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nuttx_add_application(
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NAME
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testtlb
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PRIORITY
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${CONFIG_BENCHMARK_TESTTLB_PRIORITY}
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STACKSIZE
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${CONFIG_BENCHMARK_TESTTLB_STACKSIZE}
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MODULE
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${CONFIG_BENCHMARK_TESTTLB}
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COMPILE_FLAGS
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${CFLAGS}
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SRCS
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${SRCS})
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endif()

‎benchmarks/test-tlb/Kconfig

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#
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# Copyright (C) 2024 Xiaomi Corporation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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config BENCHMARK_TESTTLB
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tristate "Memory Latency profiling"
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depends on ALLOW_GPL_COMPONENTS
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default n
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---help---
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Measure the memory latency
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if BENCHMARK_TESTTLB
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config BENCHMARK_TESTTLB_PRIORITY
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int "TestTLB task priority"
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default 100
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config BENCHMARK_TESTTLB_STACKSIZE
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int "TestTLB stack size"
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default DEFAULT_TASK_STACKSIZE
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endif

‎benchmarks/test-tlb/Make.defs

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#
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# Copyright (C) 2024 Xiaomi Corporation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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ifneq ($(CONFIG_BENCHMARK_TESTTLB),)
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CONFIGURED_APPS += $(APPDIR)/benchmarks/test-tlb
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endif

‎benchmarks/test-tlb/Makefile

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#
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# Copyright (C) 2024 Xiaomi Corporation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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include $(APPDIR)/Make.defs
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PROGNAME = testtlb
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PRIORITY = $(CONFIG_BENCHMARK_TESTTLB_PRIORITY)
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STACKSIZE = $(CONFIG_BENCHMARK_TESTTLB_STACKSIZE)
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MODULE = $(CONFIG_BENCHMARK_TESTTLB)
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TESTTLB_UNPACK = test-tlb
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TESTTLB_GIT = github.com/torvalds/test-tlb
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TESTTLB_URL = https://github.com/torvalds/test-tlb/archive
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TESTTLB_VERSION = master
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TESTTLB_ZIP = $(TESTTLB_UNPACK)-$(TESTTLB_VERSION).zip
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UNPACK ?= unzip -q -o
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$(TESTTLB_ZIP):
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@echo "Downloading: $(TESTTLB_URL)"
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$(Q) curl -L $(TESTTLB_URL)/$(TESTTLB_VERSION).zip -o $(TESTTLB_UNPACK)-$(TESTTLB_VERSION).zip
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$(TESTTLB_UNPACK): $(TESTTLB_ZIP)
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@echo "Unpacking: $(TESTTLB_ZIP) -> $(TESTTLB_UNPACK)"
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$(Q) $(UNPACK) $(TESTTLB_ZIP)
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$(Q) mv test-tlb-$(TESTTLB_VERSION) $(TESTTLB_UNPACK)
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$(Q) touch $(TESTTLB_UNPACK)
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@echo "Patching: Applying patch"
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$(Q) cd test-tlb && patch -p1 < ../0001-test-tlb-port-for-NuttX.patch
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ifeq ($(wildcard $(TESTTLB_UNPACK)/.git),)
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context:: $(TESTTLB_UNPACK)
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distclean::
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$(call DELDIR, $(TESTTLB_UNPACK))
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$(call DELFILE, $(TESTTLB_ZIP))
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endif
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MAINSRC = test-tlb/test-tlb.c
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include $(APPDIR)/Application.mk

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