- Add a DDB command 'show intrcnt' to show the non-zero interrupt counts.
- Add a DDB function to dump the contents of an ithread and optionally details about each handler in that ithread. This function can be used by MD code to implement DDB commands that display information about interrupt sources and their registered handlers.
This commit is contained in:
John Baldwin
parent
07930cce05
commit
8b201c42c6
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=121482
@ -27,6 +27,8 @@
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ddb.h"
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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@ -49,6 +51,10 @@ __FBSDID("$FreeBSD$");
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#include <machine/cpu.h>
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#include <machine/md_var.h>
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#include <machine/stdarg.h>
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#ifdef DDB
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#include <ddb/ddb.h>
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#include <ddb/db_sym.h>
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#endif
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struct int_entropy {
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struct proc *proc;
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@ -561,6 +567,143 @@ ithread_loop(void *arg)
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}
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}
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#ifdef DDB
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/*
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* Dump details about an interrupt handler
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*/
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static void
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db_dump_intrhand(struct intrhand *ih)
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{
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int comma;
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db_printf("\t%-10s ", ih->ih_name);
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switch (ih->ih_pri) {
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case PI_REALTIME:
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db_printf("CLK ");
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break;
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case PI_AV:
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db_printf("AV ");
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break;
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case PI_TTYHIGH:
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case PI_TTYLOW:
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db_printf("TTY ");
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break;
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case PI_TAPE:
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db_printf("TAPE");
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break;
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case PI_NET:
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db_printf("NET ");
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break;
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case PI_DISK:
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case PI_DISKLOW:
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db_printf("DISK");
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break;
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case PI_DULL:
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db_printf("DULL");
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break;
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default:
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if (ih->ih_pri >= PI_SOFT)
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db_printf("SWI ");
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else
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db_printf("%4u", ih->ih_pri);
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break;
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}
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db_printf(" ");
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db_printsym((uintptr_t)ih->ih_handler, DB_STGY_PROC);
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db_printf("(%p)", ih->ih_argument);
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if (ih->ih_need ||
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(ih->ih_flags & (IH_FAST | IH_EXCLUSIVE | IH_ENTROPY | IH_DEAD |
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IH_MPSAFE)) != 0) {
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db_printf(" {");
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comma = 0;
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if (ih->ih_flags & IH_FAST) {
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db_printf("FAST");
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comma = 1;
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}
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if (ih->ih_flags & IH_EXCLUSIVE) {
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if (comma)
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db_printf(", ");
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db_printf("EXCL");
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comma = 1;
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}
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if (ih->ih_flags & IH_ENTROPY) {
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if (comma)
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db_printf(", ");
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db_printf("ENTROPY");
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comma = 1;
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}
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if (ih->ih_flags & IH_DEAD) {
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if (comma)
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db_printf(", ");
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db_printf("DEAD");
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comma = 1;
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}
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if (ih->ih_flags & IH_MPSAFE) {
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if (comma)
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db_printf(", ");
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db_printf("MPSAFE");
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comma = 1;
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}
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if (ih->ih_need) {
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if (comma)
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db_printf(", ");
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db_printf("NEED");
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}
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db_printf("}");
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}
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db_printf("\n");
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}
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/*
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* Dump details about an ithread
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*/
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void
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db_dump_ithread(struct ithd *ithd, int handlers)
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{
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struct proc *p;
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struct intrhand *ih;
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int comma;
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if (ithd->it_td != NULL) {
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p = ithd->it_td->td_proc;
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db_printf("%s (pid %d)", p->p_comm, p->p_pid);
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} else
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db_printf("%s: (no thread)", ithd->it_name);
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if ((ithd->it_flags & (IT_SOFT | IT_ENTROPY | IT_DEAD)) != 0 ||
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ithd->it_need) {
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db_printf(" {");
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comma = 0;
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if (ithd->it_flags & IT_SOFT) {
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db_printf("SOFT");
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comma = 1;
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}
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if (ithd->it_flags & IT_ENTROPY) {
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if (comma)
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db_printf(", ");
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db_printf("ENTROPY");
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comma = 1;
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}
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if (ithd->it_flags & IT_DEAD) {
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if (comma)
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db_printf(", ");
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db_printf("DEAD");
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comma = 1;
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}
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if (ithd->it_need) {
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if (comma)
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db_printf(", ");
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db_printf("NEED");
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}
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db_printf("}");
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}
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db_printf("\n");
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if (handlers)
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TAILQ_FOREACH(ih, &ithd->it_handlers, ih_next)
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db_dump_intrhand(ih);
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}
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#endif /* DDB */
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/*
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* Start standard software interrupt threads
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*/
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@ -609,3 +752,25 @@ sysctl_intrcnt(SYSCTL_HANDLER_ARGS)
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SYSCTL_PROC(_hw, OID_AUTO, intrcnt, CTLTYPE_OPAQUE | CTLFLAG_RD,
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NULL, 0, sysctl_intrcnt, "", "Interrupt Counts");
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#ifdef DDB
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/*
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* DDB command to dump the interrupt statistics.
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*/
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DB_SHOW_COMMAND(intrcnt, db_show_intrcnt)
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{
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u_long *i;
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char *cp;
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int quit;
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cp = intrnames;
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db_setup_paging(db_simple_pager, &quit, DB_LINES_PER_PAGE);
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for (i = intrcnt, quit = 0; i != eintrcnt && !quit; i++) {
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if (*cp == '\0')
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break;
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if (*i != 0)
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db_printf("%s\t%lu\n", cp, *i);
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cp += strlen(cp) + 1;
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}
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}
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#endif
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@ -111,6 +111,9 @@ extern char eintrnames[]; /* end of intrnames[] */
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extern u_long intrcnt[]; /* counts for for each device and stray */
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extern char intrnames[]; /* string table containing device names */
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#ifdef DDB
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void db_dump_ithread(struct ithd *ithd, int handlers);
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#endif
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int ithread_create(struct ithd **ithread, int vector, int flags,
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void (*disable)(int), void (*enable)(int), const char *fmt, ...)
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__printflike(6, 7);
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