(nuttx-apps) 02/02: benchmarks/osperf/osperf.c: add pipe read-write performance test

[xiaoxiang]

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xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/nuttx-apps.git

commit 7ca3656c3ef352f1b7c38950b54d7867f1672be9
Author: Michal Lenc <michall...@seznam.cz>
AuthorDate: Fri Jun 13 08:35:06 2025 +0200

    benchmarks/osperf/osperf.c: add pipe read-write performance test
    
    This adds a simple pip read-write performance test.
    
    Signed-off-by: Michal Lenc <michall...@seznam.cz>
---
 benchmarks/osperf/osperf.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/benchmarks/osperf/osperf.c b/benchmarks/osperf/osperf.c
index 536d55054..0e71a4e05 100644
--- a/benchmarks/osperf/osperf.c
+++ b/benchmarks/osperf/osperf.c
@@ -71,6 +71,7 @@ static size_t pthread_switch_performance(void);
 static size_t context_switch_performance(void);
 static size_t hpwork_performance(void);
 static size_t poll_performance(void);
+static size_t pipe_performance(void);
 static size_t semwait_performance(void);
 static size_t sempost_performance(void);
 
@@ -85,6 +86,7 @@ static const struct performance_entry_s g_entry_list[] =
   {"context-switch", context_switch_performance},
   {"hpwork", hpwork_performance},
   {"poll-write", poll_performance},
+  {"pipe-rw", pipe_performance},
   {"semwait", semwait_performance},
   {"sempost", sempost_performance},
 };
@@ -290,6 +292,30 @@ static size_t poll_performance(void)
   return performance_gettime(&result);
 }
 
+/****************************************************************************
+ *  pipe performance
+ ****************************************************************************/
+
+static size_t pipe_performance(void)
+{
+  struct performance_time_s result;
+  int pipefd[2];
+  int ret;
+  char r;
+
+  ret = pipe(pipefd);
+  DEBUGASSERT(ret == 0);
+
+  performance_start(&result);
+  write(pipefd[0], "a", 1);
+  read(pipefd[1], &r, 1);
+  performance_end(&result);
+
+  close(pipefd[0]);
+  close(pipefd[1]);
+  return performance_gettime(&result);
+}
+
 /****************************************************************************
  * semwait_performance
  ****************************************************************************/