1 files changed, 107 insertions, 0 deletions
diff --git a/btt/trace_im.c b/btt/trace_im.c
new file mode 100644
index 0000000..49c876c
--- /dev/null
+++ b/btt/trace_im.c
@@ -0,0 +1,107 @@
+/*
+ * blktrace output analysis: generate a timeline & gather statistics
+ *
+ * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+#include "globals.h"
+
+static void handle_g(struct io *g_iop)
+{
+	struct io *q_iop;
+
+	iostat_getrq(g_iop);
+
+	q_iop = dip_find_sec(g_iop->dip, IOP_Q, g_iop->t.sector);
+	if (q_iop) {
+		q_iop->g_time = g_iop->t.time;
+		update_q2g(q_iop, tdelta(q_iop->t.time, g_iop->t.time));
+		if (q_iop->s_time != 0)
+			update_s2g(q_iop, tdelta(q_iop->s_time, g_iop->t.time));
+	}
+}
+
+static void handle_s(struct io *s_iop)
+{
+	struct io *q_iop = dip_find_sec(s_iop->dip, IOP_Q, s_iop->t.sector);
+
+	if (q_iop)
+		q_iop->s_time = s_iop->t.time;
+}
+
+static void handle_i(struct io *i_iop)
+{
+	struct io *q_iop = dip_find_sec(i_iop->dip, IOP_Q, i_iop->t.sector);
+
+	if (q_iop) {
+		q_iop->i_time = i_iop->t.time;
+		if (q_iop->g_time != (__u64)-1)
+			update_g2i(q_iop, tdelta(q_iop->g_time, i_iop->t.time));
+	}
+}
+
+static void handle_m(struct io *m_iop)
+{
+	struct io *q_iop;
+
+	iostat_merge(m_iop);
+
+	q_iop = dip_find_sec(m_iop->dip, IOP_Q, m_iop->t.sector);
+	if (q_iop) {
+		q_iop->m_time = m_iop->t.time;
+		update_q2m(q_iop, tdelta(q_iop->t.time, m_iop->t.time));
+	}
+
+	if (m_iop->dip->n_act_q != 0)
+		m_iop->dip->n_act_q--;
+}
+
+void trace_sleeprq(struct io *s_iop)
+{
+	if (s_iop->t.bytes == 0)
+		return;
+	if (io_setup(s_iop, IOP_S))
+		handle_s(s_iop);
+	io_release(s_iop);
+}
+
+void trace_getrq(struct io *g_iop)
+{
+	if (g_iop->t.bytes == 0)
+		return;
+	if (io_setup(g_iop, IOP_G))
+		handle_g(g_iop);
+	io_release(g_iop);
+}
+
+void trace_insert(struct io *i_iop)
+{
+	if (i_iop->t.bytes == 0)
+		return;
+	if (io_setup(i_iop, IOP_I))
+		handle_i(i_iop);
+	io_release(i_iop);
+}
+
+void trace_merge(struct io *m_iop)
+{
+	if (m_iop->t.bytes == 0)
+		return;
+	if (io_setup(m_iop, IOP_M))
+		handle_m(m_iop);
+	io_release(m_iop);
+}