[haiku-commits] r33521 - haiku/trunk/src/add-ons/kernel/bus_managers/scsi
- From: mmlr@xxxxxxxx
- To: haiku-commits@xxxxxxxxxxxxx
- Date: Sun, 11 Oct 2009 18:42:21 +0200 (CEST)
Author: mmlr
Date: 2009-10-11 18:42:21 +0200 (Sun, 11 Oct 2009)
New Revision: 33521
Changeset: http://dev.haiku-os.org/changeset/33521/haiku
Modified:
haiku/trunk/src/add-ons/kernel/bus_managers/scsi/emulation.c
Log:
A disabled debug helper to visualize reads/writes and if they would have been
contiguous. Was used to optimized CD boot before the alpha release.
Modified: haiku/trunk/src/add-ons/kernel/bus_managers/scsi/emulation.c
===================================================================
--- haiku/trunk/src/add-ons/kernel/bus_managers/scsi/emulation.c
2009-10-11 16:40:12 UTC (rev 33520)
+++ haiku/trunk/src/add-ons/kernel/bus_managers/scsi/emulation.c
2009-10-11 16:42:21 UTC (rev 33521)
@@ -126,6 +126,29 @@
cdb->length = B_HOST_TO_BENDIAN_INT16((uint16)cmd->length);
cdb->control = cmd->control;
+ if (0) {
+ static uint32 lastLBA = 0;
+ static uint16 lastLength = 0;
+ static uint32 contigCount = 0;
+ static uint64 totalContig = 0;
+
+ uint32 currentLBA = B_BENDIAN_TO_HOST_INT32(cdb->lba);
+ uint16 currentLength = B_BENDIAN_TO_HOST_INT16(cdb->length);
+
+ if (lastLBA + lastLength == currentLBA) {
+ contigCount++;
+ totalContig++;
+ } else
+ contigCount = 0;
+
+ lastLBA = currentLBA;
+ lastLength = currentLength;
+
+ dprintf("scsi_read_write_6: %lld lba %ld; length: %d\n",
totalContig,
+ B_BENDIAN_TO_HOST_INT32(cdb->lba),
+ B_BENDIAN_TO_HOST_INT16(cdb->length));
+ }
+
return true;
}
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