Modify plotting script to handle drop stats.

New argument --metric, which can be cpu|drops, controls whether to graph
cpu usage or event drop percentage. Titles/axis labels/etc. change
appropriately.

test/plot-live.r

@@ -13,23 +13,35 @@ if (substr(script.basename, 1, 1) != '/') {
 
 results = paste(script.basename, "results.json", sep='/')
 output = "./output.png"
+metric = "cpu"
 
 GetoptLong(
     "results=s", "Path to results file",
     "benchmark=s", "Benchmark from results file to graph",
     "variant=s@", "Variant(s) to include in graph. Can be specified multiple times",
-    "output=s", "Output graph file"
+    "output=s", "Output graph file",
+    "metric=s", "Metric to graph. Can be one of (cpu|drops)"
 )
 
+if (metric == "cpu") {
+    data_metric="cpu_usage"
+    yaxis_label="CPU Usage (%)"
+    title="Falco/Sysdig/Multimatch CPU Usage: %s"
+} else if (metric == "drops") {
+    data_metric="drop_pct"
+    yaxis_label="Event Drops (%)"
+    title="Falco/Sysdig/Multimatch Event Drops: %s"
+}
+
 res <- fromJSON(results, flatten=TRUE)
 
 res2 = res[res$benchmark == benchmark & res$variant %in% variant,]
 
-plot <- ggplot(data=res2, aes(x=sample, y=cpu_usage, group=variant, colour=variant)) +
+plot <- ggplot(data=res2, aes(x=sample, y=get(data_metric), group=variant, colour=variant)) +
     geom_line() +
-    ylab("CPU Usage (%)") +
+    ylab(yaxis_label) +
     xlab("Time") +
-    ggtitle(sprintf("Falco/Sysdig CPU Usage: %s", benchmark))
+    ggtitle(sprintf(title, benchmark))
     theme(legend.position=c(.2, .88));
 
 print(paste("Writing graph to", output, sep=" "))