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More aggressively fill WUT read pipeline.

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On some tests I've measured 5% copy speedup from this.
This commit is contained in:
Alexander Motin 2015-10-01 19:07:15 +00:00
parent 66917ca9d2
commit 0952a19f7d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=288458
1 changed files with 4 additions and 5 deletions
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9
sys/cam/ctl/ctl_tpc.c
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@ -1128,7 +1128,7 @@ static int
tpc_process_wut(struct tpc_list *list)
{
struct tpc_io *tio, *tior, *tiow;
struct runl run, *prun;
struct runl run;
int drange, srange;
off_t doffset, soffset;
off_t srclba, dstlba, numbytes, donebytes, roundbytes;
@ -1208,8 +1208,7 @@ tpc_process_wut(struct tpc_list *list)
// srclba, dstlba);
donebytes = 0;
TAILQ_INIT(&run);
prun = &run;
list->tbdio = 1;
list->tbdio = 0;
TAILQ_INIT(&list->allio);
while (donebytes < numbytes) {
roundbytes = numbytes - donebytes;
@ -1262,8 +1261,8 @@ tpc_process_wut(struct tpc_list *list)
tiow->io->io_hdr.ctl_private[CTL_PRIV_FRONTEND].ptr = tiow;
TAILQ_INSERT_TAIL(&tior->run, tiow, rlinks);
TAILQ_INSERT_TAIL(prun, tior, rlinks);
prun = &tior->run;
TAILQ_INSERT_TAIL(&run, tior, rlinks);
list->tbdio++;
donebytes += roundbytes;
srclba += roundbytes / srcblock;
dstlba += roundbytes / dstblock;