1 files changed, 66 insertions, 0 deletions
diff --git a/verify_blkparse.c b/verify_blkparse.c
new file mode 100644
index 0000000..aae8d7c
--- /dev/null
+++ b/verify_blkparse.c
@@ -0,0 +1,66 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+
+#define MAX_CPUS	(512)
+
+int main(int argc, char *argv[])
+{
+	double this_time, last_time;
+	char line[256], last_line[256], *p;
+	int major, minor, cpu, nr, alias;
+	unsigned long long total_entries;
+	unsigned int last_seq[MAX_CPUS], seq;
+	FILE *f;
+
+	for (nr = 0; nr < MAX_CPUS; nr++)
+		last_seq[nr] = -1;
+
+	if (argc < 2) {
+		fprintf(stderr, "%s: file\n", argv[0]);
+		return 1;
+	}
+
+	f = fopen(argv[1], "r");
+	if (!f) {
+		perror("fopen");
+		return 1;
+	}
+
+	last_time = 0;
+	alias = nr = 0;
+	total_entries = 0;
+	while ((p = fgets(line, sizeof(line), f)) != NULL) {
+		if (sscanf(p, "%3d,%3d %2d %8d %lf", &major, &minor, &cpu, &seq, &this_time) != 5)
+			break;
+
+		if (this_time < last_time) {
+			fprintf(stdout, "last: %s", last_line);
+			fprintf(stdout, "this: %s", p);
+			nr++;
+		}
+
+		last_time = this_time;
+
+		if (cpu >= MAX_CPUS) {
+			fprintf(stderr, "cpu%d too large\n", cpu);
+			break;
+		}
+
+		if (last_seq[cpu] == seq) {
+			fprintf(stdout, "alias on sequence %u\n", seq);
+			alias++;
+		}
+
+		last_seq[cpu] = seq;
+		total_entries++;
+		strcpy(last_line, line);
+	}
+
+	fprintf(stdout, "Events %Lu: %d unordered, %d aliases\n", total_entries, nr, alias);
+	fclose(f);
+
+	return nr != 0;
+}