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Add some histogram code (controlled by an #ifdef) to track how long various 

busy-wait loops take.
This commit is contained in:
mycroft 2004-07-22 20:34:52 +00:00
parent 1854f1b055
commit 0e8c7f506b
1 changed files with 55 additions and 2 deletions
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57
sys/dev/ic/wi.c
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@ -1,4 +1,4 @@
/* $NetBSD: wi.c,v 1.177 2004/07/22 20:30:43 mycroft Exp $ */
/* $NetBSD: wi.c,v 1.178 2004/07/22 20:34:52 mycroft Exp $ */
/*
* Copyright (c) 1997, 1998, 1999
@ -70,10 +70,11 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: wi.c,v 1.177 2004/07/22 20:30:43 mycroft Exp $");
__KERNEL_RCSID(0, "$NetBSD: wi.c,v 1.178 2004/07/22 20:34:52 mycroft Exp $");
#define WI_HERMES_AUTOINC_WAR /* Work around data write autoinc bug. */
#define WI_HERMES_STATS_WAR /* Work around stats counter bug. */
#undef WI_HISTOGRAM
#define STATIC static
#include "bpfilter.h"
@ -2396,6 +2397,12 @@ wi_write_wep(struct wi_softc *sc)
STATIC int
wi_cmd(struct wi_softc *sc, int cmd, int val0, int val1, int val2)
{
#ifdef WI_HISTOGRAM
static int hist1[11];
static int hist1count;
static int hist2[11];
static int hist2count;
#endif
int i, status;
/* wait for the busy bit to clear */
@ -2409,6 +2416,20 @@ wi_cmd(struct wi_softc *sc, int cmd, int val0, int val1, int val2)
sc->sc_dev.dv_xname);
return(ETIMEDOUT);
}
#ifdef WI_HISTOGRAM
if (i > 490)
hist1[500 - i]++;
else
hist1[10]++;
if (++hist1count == 1000) {
hist1count = 0;
printf("%s: hist1: %d %d %d %d %d %d %d %d %d %d %d\n",
sc->sc_dev.dv_xname,
hist1[0], hist1[1], hist1[2], hist1[3], hist1[4],
hist1[5], hist1[6], hist1[7], hist1[8], hist1[9],
hist1[10]);
}
#endif
CSR_WRITE_2(sc, WI_PARAM0, val0);
CSR_WRITE_2(sc, WI_PARAM1, val1);
CSR_WRITE_2(sc, WI_PARAM2, val2);
@ -2424,6 +2445,20 @@ wi_cmd(struct wi_softc *sc, int cmd, int val0, int val1, int val2)
break;
DELAY(WI_DELAY);
}
#ifdef WI_HISTOGRAM
if (i < 100)
hist2[i/10]++;
else
hist2[10]++;
if (++hist2count == 1000) {
hist2count = 0;
printf("%s: hist2: %d %d %d %d %d %d %d %d %d %d %d\n",
sc->sc_dev.dv_xname,
hist2[0], hist2[1], hist2[2], hist2[3], hist2[4],
hist2[5], hist2[6], hist2[7], hist2[8], hist2[9],
hist2[10]);
}
#endif
status = CSR_READ_2(sc, WI_STATUS);
@ -2447,6 +2482,10 @@ wi_cmd(struct wi_softc *sc, int cmd, int val0, int val1, int val2)
STATIC int
wi_seek_bap(struct wi_softc *sc, int id, int off)
{
#ifdef WI_HISTOGRAM
static int hist4[11];
static int hist4count;
#endif
int i, status;
CSR_WRITE_2(sc, WI_SEL0, id);
@ -2464,6 +2503,20 @@ wi_seek_bap(struct wi_softc *sc, int id, int off)
}
DELAY(1);
}
#ifdef WI_HISTOGRAM
if (i < 100)
hist4[i/10]++;
else
hist4[10]++;
if (++hist4count == 2500) {
hist4count = 0;
printf("%s: hist4: %d %d %d %d %d %d %d %d %d %d %d\n",
sc->sc_dev.dv_xname,
hist4[0], hist4[1], hist4[2], hist4[3], hist4[4],
hist4[5], hist4[6], hist4[7], hist4[8], hist4[9],
hist4[10]);
}
#endif
if (status & WI_OFF_ERR) {
printf("%s: failed in wi_seek to %x/%x\n",
sc->sc_dev.dv_xname, id, off);