From: Alan D. Brunelle <Alan.Brunelle@hp.com>
Date: Mon, 26 Feb 2007 19:44:28 +0000 (+0100)
Subject: Add in the notion of pre-culling IOs per device until a Q is hit.
X-Git-Tag: blktrace-0.99.3~26
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=11997716f0b60e3602a807b60c85636aa17af984;p=blktrace.git

Add in the notion of pre-culling IOs per device until a Q is hit.

Signed-off-by: Alan D. Brunelle <Alan.Brunelle@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---

diff --git a/btt/devs.c b/btt/devs.c
index f2b09d2..a458a77 100644
--- a/btt/devs.c
+++ b/btt/devs.c
@@ -112,9 +112,17 @@ struct d_info *dip_add(__u32 device, struct io *iop)
 		list_add_tail(&dip->hash_head, &dev_heads[DEV_HASH(device)]);
 		list_add_tail(&dip->all_head, &all_devs);
 		dip->start_time = BIT_TIME(iop->t.time);
+		dip->pre_culling = 1;
 		n_devs++;
 	}
 
+	if (dip->pre_culling) {
+		if (iop->type == IOP_Q || iop->type == IOP_A)
+			dip->pre_culling = 0;
+		else
+			return NULL;
+	}
+
 	iop->linked = dip_rb_ins(dip, iop);
 #if defined(DEBUG)
 	if (iop->linked) 
diff --git a/btt/globals.h b/btt/globals.h
index aebd0d8..cdf6fc9 100644
--- a/btt/globals.h
+++ b/btt/globals.h
@@ -166,6 +166,7 @@ struct d_info {
 	__u64 last_q, n_ds;
 	__u32 device;
 
+	int pre_culling;
 	int is_plugged, nplugs, n_timer_unplugs;
 	double start_time, last_plug, plugged_time, end_time;
 };