From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Mon, 15 Nov 2010 15:51:36 +0000 (-0500)
Subject: ASCII art for dep analysis
X-Git-Tag: v0.12.36~1^2~1
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=8d30813496c3de5beb08128d255164cd1dacfc0a;p=lttv.git

ASCII art for dep analysis

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/lttv/modules/text/depanalysis.c b/lttv/modules/text/depanalysis.c
index 2dfc522b..5a4064ae 100644
--- a/lttv/modules/text/depanalysis.c
+++ b/lttv/modules/text/depanalysis.c
@@ -907,6 +907,20 @@ static struct process_state *find_state_ending_after(int pid, LttTime t)
 		return g_array_index(p->hlev_history, struct process_state *, result);
 }
 
+static void print_indent(int offset)
+{
+	if (offset > 2) {
+		int i;
+
+		printf("%*s", 8, "");
+		for (i = 3; i < offset; i++) {
+			printf("|");
+			printf("%*s", 4, "");
+		}
+	} else
+		printf("%*s", 4*offset, "");
+}
+
 static void print_delay_pid(int pid, LttTime t1, LttTime t2, int offset)
 {
 	struct process *p;
@@ -927,8 +941,8 @@ static void print_delay_pid(int pid, LttTime t1, LttTime t2, int offset)
 			state_private_blocked = pstate->private;
 			struct process_state *state_unblocked;
 
-			printf("%*s", 8*offset, "");
-			printf("Blocked in ");
+			print_indent(offset);
+			printf("--> Blocked in ");
 			print_stack_garray_horizontal(state_private_blocked->llev_state_entry);
 
 			printf("(times: ");
@@ -943,15 +957,15 @@ static void print_delay_pid(int pid, LttTime t1, LttTime t2, int offset)
 				if(state_unblocked->bstate == HLEV_INTERRUPTED_IRQ) {
 					struct hlev_state_info_interrupted_irq *priv = state_unblocked->private;
 					/* if in irq or softirq, we don't care what the waking process was doing because they are asynchroneous events */
-					printf("%*s", 8*offset, "");
-					printf("Woken up by an IRQ: ");
+					print_indent(offset);
+					printf("--- Woken up by an IRQ: ");
 					print_irq(priv->irq);
 					printf("\n");
 				}
 				else if(state_unblocked->bstate == HLEV_INTERRUPTED_SOFTIRQ) {
 					struct hlev_state_info_interrupted_softirq *priv = state_unblocked->private;
-					printf("%*s", 8*offset, "");
-					printf("Woken up by a SoftIRQ: ");
+					print_indent(offset);
+					printf("--- Woken up by a SoftIRQ: ");
 					print_softirq(priv->softirq);
 					printf("\n");
 				}
@@ -965,8 +979,8 @@ static void print_delay_pid(int pid, LttTime t1, LttTime t2, int offset)
 						t2prime = pstate->time_end;
 
 					print_delay_pid(state_private_blocked->pid_exit, t1prime, t2prime, offset+1);
-					printf("%*s", 8*offset, "");
-					printf("Woken up in context of ");
+					print_indent(offset);
+					printf("--- Woken up in context of ");
 					print_pid(state_private_blocked->pid_exit);
 					if(state_private_blocked->llev_state_exit) {
 						print_stack_garray_horizontal(state_private_blocked->llev_state_exit);
@@ -978,7 +992,7 @@ static void print_delay_pid(int pid, LttTime t1, LttTime t2, int offset)
 				}
 			}
 			else {
-				printf("%*s", 8*offset, "");
+				print_indent(offset);
 				printf("Weird... cannot find in what state the waker (%d) was\n", state_private_blocked->pid_exit);
 			}
 
@@ -1003,6 +1017,17 @@ static void print_range_critical_path(int process, LttTime t1, LttTime t2)
 	print_delay_pid(process, t1, t2, 2);
 }
 
+/*
+ * output legend example:
+ *
+ *           --> Blocked in RUNNING, SYSCALL NNN [syscall_name]
+ *           |      ---> Blocked in RUNNING, SYSCALL NNN [syscall_name]
+ *           |      |        --> Blocked in RUNNING, SYSCALL  [syscall_name]
+ *           |      |        --- Woken up by an IRQ: IRQ 0 [timer]
+ *           |      ---  Woken up in context of PID [appname] in high-level state RUNNING
+ *           --- Woken up in context of PID [appname] in high-level state RUNNING
+ */
+
 static void print_process_critical_path_summary()
 {
 	struct process *pinfo;