sptimecounter02: Convert to JSON data

This avoids a dependency on the non-standard libxml2 module.

testsuites/sptests/sptimecounter02/init.c

@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: BSD-2-Clause */
 
 /*
- * Copyright (c) 2015 embedded brains GmbH & Co. KG
+ * Copyright (C) 2015, 2024 embedded brains GmbH & Co. KG
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -61,6 +61,8 @@ const char rtems_test_name[] = "SPTIMECOUNTER 2";
 
 typedef struct {
   rtems_test_parallel_context base;
+  const char *test_sep;
+  const char *counter_sep;
   struct timecounter tc_null;
   uint32_t binuptime_per_job[CPU_COUNT];
   sbintime_t duration_per_job[CPU_COUNT];
@@ -90,6 +92,45 @@ static void install_tc_null(timecounter_context *ctx)
   rtems_timecounter_install(tc_cpu);
 }
 
+static void test_print_results(
+  const char *driver,
+  timecounter_context *ctx,
+  size_t active_workers
+)
+{
+  const char *value_sep;
+  size_t i;
+
+  if (active_workers == 1) {
+    printf(
+      "%s{\n"
+      "    \"timecounter\": \"%s\",\n"
+      "    \"counter\": [",
+      ctx->test_sep,
+      driver
+    );
+    ctx->test_sep = ", ";
+    ctx->counter_sep = "\n      ";
+  }
+
+  printf("%s[", ctx->counter_sep);
+  ctx->counter_sep = "],\n      ";
+  value_sep = "";
+
+  for (i = 0; i < active_workers; ++i) {
+    printf(
+      "%s%" PRIu32,
+      value_sep,
+      ctx->binuptime_per_job[i]
+    );
+    value_sep = ", ";
+  }
+
+  if (active_workers == rtems_scheduler_get_processor_maximum()) {
+    printf("]\n    ]\n  }");
+  }
+}
+
 static rtems_interval test_bintime_init(
   rtems_test_parallel_context *base,
   void *arg,
@@ -133,25 +174,14 @@ static void test_bintime_fini(
   timecounter_context *ctx = (timecounter_context *) base;
   size_t i;
 
-  printf("  <BinuptimeTest activeWorker=\"%zu\">\n", active_workers);
-
   for (i = 0; i < active_workers; ++i) {
     sbintime_t error;
 
-    printf(
-      "    <Counter worker=\"%zu\">%" PRIu32 "</Counter>\n"
-      "    <Duration worker=\"%zu\" unit=\"sbintime\">%" PRId64 "</Duration>\n",
-      i + 1,
-      ctx->binuptime_per_job[i],
-      i + 1,
-      ctx->duration_per_job[i]
-    );
-
     error = DURATION_IN_SECONDS * SBT_1S - ctx->duration_per_job[i];
     rtems_test_assert(error * error < SBT_1MS * SBT_1MS);
   }
 
-  printf("  </BinuptimeTest>\n");
+  test_print_results("Clock Driver", ctx, active_workers);
 }
 
 static rtems_interval test_bintime_null_init(
@@ -192,20 +222,7 @@ static void test_bintime_null_fini(
   size_t active_workers
 )
 {
-  timecounter_context *ctx = (timecounter_context *) base;
-  size_t i;
-
-  printf("  <BinuptimeNullTest activeWorker=\"%zu\">\n", active_workers);
-
-  for (i = 0; i < active_workers; ++i) {
-    printf(
-      "    <Counter worker=\"%zu\">%" PRIu32 "</Counter>\n",
-      i + 1,
-      ctx->binuptime_per_job[i]
-    );
-  }
-
-  printf("  </BinuptimeNullTest>\n");
+  test_print_results("Null", (timecounter_context *) base, active_workers);
 }
 
 static const rtems_test_parallel_job timecounter_jobs[] = {
@@ -231,8 +248,9 @@ static void Init(rtems_task_argument arg)
 
   TEST_BEGIN();
 
-  printf("<SPTimecounter01>\n");
+  printf("*** BEGIN OF JSON DATA ***\n[\n  ");
 
+  ctx->test_sep = "";
   rtems_test_parallel(
     &ctx->base,
     NULL,
@@ -240,6 +258,8 @@ static void Init(rtems_task_argument arg)
     RTEMS_ARRAY_SIZE(timecounter_jobs)
   );
 
+  printf("\n]\n*** END OF JSON DATA ***\n");
+
   /* Check for all functions available in the bsd.h user space */
 
   rtems_bsd_bintime(&bt);
@@ -255,8 +275,6 @@ static void Init(rtems_task_argument arg)
   rtems_bsd_getmicrouptime(&tv);
   rtems_bsd_getnanouptime(&ts);
 
-  printf("</SPTimecounter01>\n");
-
   TEST_END();
   rtems_test_exit(0);
 }

testsuites/sptests/sptimecounter02/sptimecounter02.py

@@ -1,9 +1,6 @@
-#!/usr/bin/env python
-
 # SPDX-License-Identifier: BSD-2-Clause
 
-#
-# Copyright (c) 2016 embedded brains GmbH & Co. KG
+# Copyright (C) 2016, 2024 embedded brains GmbH & Co. KG
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
@@ -25,37 +22,38 @@
 # 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.
-#
 
+import json
 import re
-import libxml2
-from libxml2 import xmlNode
-import matplotlib.pyplot as plt
-data = open('sptimecounter02.scn').read()
-data = re.sub(r'\*\*\*.*\*\*\*', '', data)
-doc = libxml2.parseDoc(data)
-ctx = doc.xpathNewContext()
+import matplotlib.pyplot as plt  # type: ignore
+from matplotlib import ticker  # type: ignore
 
-plt.title('Timestamp Performance')
-plt.xlabel('Active Workers')
-plt.ylabel('Operation Count')
 
-def m(n):
-	return int(n.getContent())
+def _plot(data: dict) -> None:
+    _, axes = plt.subplots()
+    axes.set_title("Timestamp Performance")
+    axes.set_xlabel("Active Workers")
+    axes.set_ylabel("Operation Count")
+    x = list(range(1, len(data[0]["counter"]) + 1))
+    axes.xaxis.set_major_locator(ticker.FixedLocator(x))
+    for samples in data:
+        y = [sum(values) for values in samples["counter"]]
+        axes.plot(x,
+                  y,
+                  label=samples["timecounter"],
+                  marker="o")
+    axes.legend(loc="best")
+    plt.savefig("sptimecounter02.png")
+    plt.savefig("sptimecounter02.pdf")
+    plt.close()
 
-def getCounterSums(variant):
-	w = 1
-	y = []
-	while True:
-		c = map(m, ctx.xpathEval('/SPTimecounter01/' + variant + '[@activeWorker="' + str(w) + '"]/Counter'))
-		if not c:
-			break
-		y.append(sum(c))
-		w = w + 1
-	return y
 
-y = getCounterSums('BinuptimeTest')
-x = range(1, len(y) + 1)
-plt.xticks(x)
-plt.plot(x, y, marker = 'o')
-plt.show()
+_JSON_DATA = re.compile(
+    r"\*\*\* BEGIN OF JSON DATA \*\*\*(.*)"
+    r"\*\*\* END OF JSON DATA \*\*\*", re.DOTALL)
+
+with open("sptimecounter02.scn", "r", encoding="utf-8") as src:
+    match = _JSON_DATA.search(src.read())
+    data = json.loads(match.group(1))
+
+_plot(data)