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From: =?UTF-8?q?Mattias=20R=C3=B6nnblom?= <mattias.ronnblom@ericsson.com>
To: <olivier.matz@6wind.com>
CC: Emil Berg <emil.berg@ericsson.com>, <bruce.richardson@intel.com>,
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Subject: [PATCH v3 1/2] app/test: add cksum performance test
Date: Mon, 11 Jul 2022 14:11:31 +0200
Message-ID: <20220711121132.34546-1-mattias.ronnblom@ericsson.com>
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Add performance test for the rte_raw_cksum() function, which delegates
the actual work to __rte_raw_cksum(), which in turn is used by other
functions in need of Internet checksum calculation.
Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
---
v3:
* Changed init function buffer parameter type, to avoid cast.
* Code formatting improved.
v2:
* Added __rte_unused to unused volatile variable, to keep the Intel
compiler happy.
---
MAINTAINERS | 1 +
app/test/meson.build | 1 +
app/test/test_cksum_perf.c | 117 +++++++++++++++++++++++++++++++++++++
3 files changed, 119 insertions(+)
create mode 100644 app/test/test_cksum_perf.c
diff --git a/MAINTAINERS b/MAINTAINERS
index c923712946..2a4c99e05a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1414,6 +1414,7 @@ Network headers
M: Olivier Matz <olivier.matz@6wind.com>
F: lib/net/
F: app/test/test_cksum.c
+F: app/test/test_cksum_perf.c
Packet CRC
M: Jasvinder Singh <jasvinder.singh@intel.com>
diff --git a/app/test/meson.build b/app/test/meson.build
index 431c5bd318..191db03d1d 100644
--- a/app/test/meson.build
+++ b/app/test/meson.build
@@ -18,6 +18,7 @@ test_sources = files(
'test_bpf.c',
'test_byteorder.c',
'test_cksum.c',
+ 'test_cksum_perf.c',
'test_cmdline.c',
'test_cmdline_cirbuf.c',
'test_cmdline_etheraddr.c',
diff --git a/app/test/test_cksum_perf.c b/app/test/test_cksum_perf.c
new file mode 100644
index 0000000000..1f296cae34
--- /dev/null
+++ b/app/test/test_cksum_perf.c
@@ -0,0 +1,117 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2022 Ericsson AB
+ */
+
+#include <stdio.h>
+
+#include <rte_common.h>
+#include <rte_cycles.h>
+#include <rte_ip.h>
+#include <rte_malloc.h>
+#include <rte_random.h>
+
+#include "test.h"
+
+#define NUM_BLOCKS 10
+#define ITERATIONS 1000000
+
+static const size_t data_sizes[] = { 20, 21, 100, 101, 1500, 1501 };
+
+static __rte_noinline uint16_t
+do_rte_raw_cksum(const void *buf, size_t len)
+{
+ return rte_raw_cksum(buf, len);
+}
+
+static void
+init_block(char *buf, size_t len)
+{
+ size_t i;
+
+ for (i = 0; i < len; i++)
+ buf[i] = (char)rte_rand();
+}
+
+static int
+test_cksum_perf_size_alignment(size_t block_size, bool aligned)
+{
+ char *data[NUM_BLOCKS];
+ char *blocks[NUM_BLOCKS];
+ unsigned int i;
+ uint64_t start;
+ uint64_t end;
+ /* Floating point to handle low (pseudo-)TSC frequencies */
+ double block_latency;
+ double byte_latency;
+ volatile __rte_unused uint64_t sum = 0;
+
+ for (i = 0; i < NUM_BLOCKS; i++) {
+ data[i] = rte_malloc(NULL, block_size + 1, 0);
+
+ if (data[i] == NULL) {
+ printf("Failed to allocate memory for block\n");
+ return TEST_FAILED;
+ }
+
+ init_block(data[i], block_size + 1);
+
+ blocks[i] = aligned ? data[i] : data[i] + 1;
+ }
+
+ start = rte_rdtsc();
+
+ for (i = 0; i < ITERATIONS; i++) {
+ unsigned int j;
+ for (j = 0; j < NUM_BLOCKS; j++)
+ sum += do_rte_raw_cksum(blocks[j], block_size);
+ }
+
+ end = rte_rdtsc();
+
+ block_latency = (end - start) / (double)(ITERATIONS * NUM_BLOCKS);
+ byte_latency = block_latency / block_size;
+
+ printf("%-9s %10zd %19.1f %16.2f\n", aligned ? "Aligned" : "Unaligned",
+ block_size, block_latency, byte_latency);
+
+ for (i = 0; i < NUM_BLOCKS; i++)
+ rte_free(data[i]);
+
+ return TEST_SUCCESS;
+}
+
+static int
+test_cksum_perf_size(size_t block_size)
+{
+ int rc;
+
+ rc = test_cksum_perf_size_alignment(block_size, true);
+ if (rc != TEST_SUCCESS)
+ return rc;
+
+ rc = test_cksum_perf_size_alignment(block_size, false);
+
+ return rc;
+}
+
+static int
+test_cksum_perf(void)
+{
+ uint16_t i;
+
+ printf("### rte_raw_cksum() performance ###\n");
+ printf("Alignment Block size TSC cycles/block TSC cycles/byte\n");
+
+ for (i = 0; i < RTE_DIM(data_sizes); i++) {
+ int rc;
+
+ rc = test_cksum_perf_size(data_sizes[i]);
+ if (rc != TEST_SUCCESS)
+ return rc;
+ }
+
+ return TEST_SUCCESS;
+}
+
+
+REGISTER_TEST_COMMAND(cksum_perf_autotest, test_cksum_perf);
--
2.25.1