TOBEFIXED: tools/zio-timestamp, quite primitive

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

TOBEFIXED: tools/zio-timestamp, quite primitive
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
6f516511 · Alessandro Rubini · Federico Vaga · 6b625f22 · 6f516511 · 6f516511
Commit 6f516511 authored Jan 31, 2013 by Alessandro Rubini Committed by Federico Vaga Oct 07, 2013
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.gitignore tools/.gitignore +1 -0

Makefile tools/Makefile +1 -0

zio-pipestamp.c tools/zio-pipestamp.c +110 -0

No files found.
--- a/tools/.gitignore
+++ b/tools/.gitignore
 zio-dump
 zio-cat-file
 test-dtc
+zio-pipestamp
\ No newline at end of file
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -8,6 +8,7 @@ HOSTCC ?= gcc
 hostprogs-y := zio-dump
 hostprogs-y += zio-cat-file
 hostprogs-y += test-dtc
+hostprogs-y += zio-pipestamp

 # The following is ugly, please forgive me by now
 user: $(hostprogs-y)

--- a/tools/zio-pipestamp.c
+++ b/tools/zio-pipestamp.c
+/*
+ * Trivial utility that reports the ZIO overhead
+ */
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <getopt.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/select.h>
+
+#include <linux/zio.h>
+#include <linux/zio-user.h>
+
+/* zio-sysfs.h cannot be included by user space, at this point: copy it */
+
+enum zio_dev_std_attr {
+	ZIO_ATTR_NBITS,			/* number of bits per sample */
+	ZIO_ATTR_GAIN,			/* gain for signal, 0.001 steps */
+	ZIO_ATTR_OFFSET,		/* microvolts */
+	ZIO_ATTR_MAXRATE,		/* hertz */
+	ZIO_ATTR_VREFTYPE,		/* source of Vref (0 = default) */
+	ZIO_ATTR_ALLOC_TIME,		/* if CONFIG_ZIO_PIPESTAMP */
+	ZIO_ATTR_STORE_TIME,		/* if CONFIG_ZIO_PIPESTAMP */
+	ZIO_ATTR_RETR_TIME,		/* if CONFIG_ZIO_PIPESTAMP */
+	ZIO_ATTR_FREE_TIME,		/* if CONFIG_ZIO_PIPESTAMP */
+	_ZIO_DEV_ATTR_STD_NUM,		/* used to size arrays */
+};
+enum zio_trg_std_attr {
+	ZIO_ATTR_TRIG_REENABLE = 0,	/* re-arm trigger */
+	ZIO_ATTR_TRIG_POST_SAMP,	/* samples after trigger fire */
+	ZIO_ATTR_TRIG_PRE_SAMP,		/* samples before trigger fire */
+	ZIO_ATTR_TRIG_ARM_TIME,		/* if CONFIG_ZIO_PIPESTAMP */
+	ZIO_ATTR_TRIG_DONE_TIME,	/* if CONFIG_ZIO_PIPESTAMP */
+	_ZIO_TRG_ATTR_STD_NUM,		/* used to size arrays */
+};
+enum zio_buf_std_attr {
+	ZIO_ATTR_ZBUF_MAXLEN = 0,	/* max number of element in buffer */
+	ZIO_ATTR_ZBUF_MAXKB,		/* max number of kB in buffer */
+	_ZIO_BUF_ATTR_STD_NUM,		/* used to size arrays */
+};
+enum zio_chn_bin_attr {
+	ZIO_BIN_CTRL = 0,		/* current control */
+	ZIO_BIN_ADDR,			/* zio_address */
+	__ZIO_BIN_ATTR_NUM,
+};
+
+/* end of zio-sysfs.h copy */
+
+
+#define  MODULE (4LL * 1000 * 1000 * 1000)
+
+/* A time is earlier (i.e., after our 4s modulus) if earlier than 100ms */
+int earlier(uint32_t a, uint32_t b)
+{
+	if (a > b)
+		return 0;
+	if (b - a < 100 * 1000 * 1000)
+		return 0;
+	return 1;
+}
+
+void report_one(struct zio_control *ctrl)
+{
+	long long t0, t1, t2, t3;
+
+	t0 = ctrl->attr_channel.std_val[ZIO_ATTR_ALLOC_TIME];
+	t1 = ctrl->attr_channel.std_val[ZIO_ATTR_STORE_TIME];
+	t2 = ctrl->attr_channel.std_val[ZIO_ATTR_RETR_TIME];
+	t3 = ctrl->attr_channel.std_val[ZIO_ATTR_FREE_TIME];
+
+	if (earlier(t1, t0)) t1 = t1 + MODULE - t0; else t1 = t1 - t0;
+	if (earlier(t2, t0)) t2 = t2 + MODULE - t0; else t2 = t2 - t0;
+	if (earlier(t3, t0)) t3 = t3 + MODULE - t0; else t3 = t3 - t0;
+
+	printf("store %9lli       retr %9lli      free   %9lli\n",
+	       t1, t2, t3);
+
+	t1 = ctrl->attr_trigger.std_val[ZIO_ATTR_TRIG_ARM_TIME];
+	t2 = ctrl->attr_trigger.std_val[ZIO_ATTR_TRIG_DONE_TIME];
+
+	if (earlier(t1, t0)) t1 = t1 + MODULE - t0; else t1 = t1 - t0;
+	if (earlier(t2, t0)) t2 = t2 + MODULE - t0; else t2 = t2 - t0;
+
+	printf("  arm %9lli       done %9lli      (delta %9lli)\n\n",
+	       t1, t2, t2 - t1);
+}
+
+int main(int argc, char **argv)
+{
+	int fd;
+	char *fname = "/dev/zio-sniff.ctrl";
+
+	struct zio_control ctrl; /* FIXME: no TLV support */
+
+	fd = open(fname, O_RDONLY);
+	if (fd < 0) {
+		fprintf(stderr, "%s: %s: %s\n", argv[0], fname,
+			strerror(errno));
+		exit(1);
+	}
+
+	while (read(fd, &ctrl, sizeof(ctrl)) == sizeof(ctrl))
+		report_one(&ctrl);
+	return 0;
+}