new feature for top - display chain of blocked processes for every
blocked process.
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parent
e6cb76a2e2
commit
72fc754948
1 changed files with 138 additions and 52 deletions
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@ -46,6 +46,8 @@ u32_t system_hz;
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char *Tclr_all;
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int blockedverbose = 0;
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#if 0
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int print_memory(struct pm_mem_info *pmi)
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{
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@ -104,27 +106,57 @@ int print_proc_summary(struct proc *proc)
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static struct tp {
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struct proc *p;
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u64_t ticks;
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} tick_procs[PROCS];
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};
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int cmp_ticks(const void *v1, const void *v2)
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{
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int c;
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struct tp *p1 = (struct tp *) v1, *p2 = (struct tp *) v2;
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int p1blocked, p2blocked;
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if (p1->ticks.hi == p2->ticks.hi) {
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if(p1->ticks.lo < p2->ticks.lo)
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return 1;
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if(p1->ticks.lo > p2->ticks.lo)
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p1blocked = !!p1->p->p_rts_flags;
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p2blocked = !!p2->p->p_rts_flags;
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/* Primarily order by used number of cpu cycles.
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*
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* Exception: if in blockedverbose mode, a blocked
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* process is always printed after an unblocked
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* process, and used cpu cycles don't matter.
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*
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* In both cases, process slot number is a tie breaker.
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*/
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if(blockedverbose && (p1blocked || p2blocked)) {
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if(!p1blocked && p2blocked)
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return -1;
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}
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if(p1->ticks.hi < p2->ticks.hi)
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return 1;
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if(p1->ticks.hi > p2->ticks.hi)
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return -1;
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if( p2blocked && !p1blocked)
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return 1;
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} else if((c=cmp64(p1->ticks, p2->ticks)) != 0)
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return -c;
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/* Process slot number is a tie breaker. */
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if(p1->p->p_nr < p2->p->p_nr)
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return -1;
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if(p1->p->p_nr > p2->p->p_nr)
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return 1;
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return 0;
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fprintf(stderr, "unreachable.\n");
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abort();
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}
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struct tp *lookup(endpoint_t who, struct tp *tptab, int np)
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{
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int t;
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for(t = 0; t < np; t++)
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if(who == tptab[t].p->p_endpoint)
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return &tptab[t];
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fprintf(stderr, "lookup: tp %d (0x%x) not found.\n", who, who);
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abort();
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return NULL;
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}
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/*
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@ -136,6 +168,45 @@ int cmp_ticks(const void *v1, const void *v2)
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*/
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#define SCALE (1 << 12)
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void print_proc(struct tp *tp, struct mproc *mpr, u32_t tcyc)
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{
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int euid = 0;
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static struct passwd *who = NULL;
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static int last_who = -1;
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char *name = "";
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unsigned long pcyc;
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int ticks;
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struct proc *pr = tp->p;
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printf("%5d ", mpr->mp_pid);
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euid = mpr->mp_effuid;
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name = mpr->mp_name;
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if(last_who != euid || !who) {
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who = getpwuid(euid);
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last_who = euid;
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}
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if(who && who->pw_name) printf("%-8s ", who->pw_name);
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else if(pr->p_nr >= 0) printf("%8d ", mpr->mp_effuid);
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else printf(" ");
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printf(" %2d ", pr->p_priority);
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if(pr->p_nr >= 0) {
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printf(" %3d ", mpr->mp_nice);
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} else printf(" ");
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printf("%5dK",
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((pr->p_memmap[T].mem_len +
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pr->p_memmap[D].mem_len) << CLICK_SHIFT)/1024);
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printf("%6s", pr->p_rts_flags ? "" : "RUN");
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ticks = pr->p_user_time;
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printf(" %3d:%02d ", (ticks/system_hz/60), (ticks/system_hz)%60);
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pcyc = div64u(tp->ticks, SCALE);
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printf("%6.2f%% %s", 100.0*pcyc/tcyc, name);
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}
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void print_procs(int maxlines,
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struct proc *proc1, struct proc *proc2,
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struct mproc *mproc)
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@ -148,6 +219,8 @@ void print_procs(int maxlines,
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u64_t total_ticks = cvu64(0);
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unsigned long tcyc;
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unsigned long tmp;
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int blockedseen = 0;
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struct tp tick_procs[PROCS];
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for(p = nprocs = 0; p < PROCS; p++) {
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if(isemptyp(&proc2[p]))
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@ -196,56 +269,63 @@ void print_procs(int maxlines,
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tmp = div64u(idleticks, SCALE);
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printf("%6.2f%% idle", 100.0*tmp/tcyc);
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printf("\n\n");
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maxlines -= 2;
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#define NEWLINE do { printf("\n"); if(--maxlines <= 0) { return; } } while(0)
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NEWLINE;
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NEWLINE;
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printf(" PID USERNAME PRI NICE SIZE STATE TIME CPU COMMAND\n");
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maxlines--;
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printf(" PID USERNAME PRI NICE SIZE STATE TIME CPU COMMAND");
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NEWLINE;
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for(p = 0; p < nprocs; p++) {
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int euid = 0;
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struct proc *pr;
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int pnr, ticks;
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char *name = "";
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static struct passwd *who = NULL;
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static int last_who = -1;
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unsigned long pcyc;
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if(maxlines-- <= 0) break;
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int pnr;
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int level = 0;
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pnr = tick_procs[p].p->p_nr;
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pr = tick_procs[p].p;
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ticks = pr->p_user_time;
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if(pnr >= 0) {
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printf("%5d ", mproc[pnr].mp_pid);
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euid = mproc[pnr].mp_effuid;
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name = mproc[pnr].mp_name;
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} else
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if(pnr < 0) {
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/* skip old kernel tasks as they don't run anymore */
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continue;
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if(last_who != euid || !who) {
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who = getpwuid(euid);
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last_who = euid;
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}
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if(who && who->pw_name) printf("%-8s ", who->pw_name);
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else if(pnr >= 0) printf("%8d ", mproc[pnr].mp_effuid);
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else printf(" ");
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pr = tick_procs[p].p;
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printf(" %2d ", pr->p_priority);
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if(pnr >= 0) {
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printf(" %3d ", mproc[pnr].mp_nice);
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} else printf(" ");
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printf("%5dK",
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((pr->p_memmap[T].mem_len +
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pr->p_memmap[D].mem_len) << CLICK_SHIFT)/1024);
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printf("%6s", pr->p_rts_flags ? "" : "RUN");
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printf(" %3d:%02d ", (ticks/system_hz/60), (ticks/system_hz)%60);
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/* If we're in blocked verbose mode, indicate start of
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* blocked processes.
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*/
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if(blockedverbose && pr->p_rts_flags && !blockedseen) {
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NEWLINE;
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printf("Blocked processes:");
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NEWLINE;
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blockedseen = 1;
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}
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pcyc = div64u(tick_procs[p].ticks, SCALE);
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print_proc(&tick_procs[p], &mproc[pnr], tcyc);
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NEWLINE;
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printf("%6.2f%% %s\n",
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100.0*pcyc/tcyc, name);
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if(!blockedverbose)
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continue;
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/* Traverse dependency chain if blocked. */
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while(pr->p_rts_flags) {
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endpoint_t dep = NONE;
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struct tp *tpdep;
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level += 5;
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if((dep = P_BLOCKEDON(pr)) == NONE) {
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printf("not blocked on a process");
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NEWLINE;
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break;
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}
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if(dep == ANY)
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break;
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tpdep = lookup(dep, tick_procs, nprocs);
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pr = tpdep->p;
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printf("%*s> ", level, "");
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print_proc(tpdep, &mproc[pr->p_nr], tcyc);
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NEWLINE;
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}
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}
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}
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@ -357,14 +437,18 @@ int main(int argc, char *argv[])
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init(&r);
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while((c=getopt(argc, argv, "s:")) != EOF) {
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while((c=getopt(argc, argv, "s:B")) != EOF) {
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switch(c) {
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case 's':
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s = atoi(optarg);
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break;
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case 'B':
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blockedverbose = 1;
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break;
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default:
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fprintf(stderr,
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"Usage: %s [-s<secdelay>]\n", argv[0]);
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"Usage: %s [-s<secdelay>] [-B]\n",
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argv[0]);
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return 1;
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}
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}
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@ -372,7 +456,9 @@ int main(int argc, char *argv[])
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if(s < 1)
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s = 2;
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/* Catch window size changes so display is updated properly right away. */
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/* Catch window size changes so display is updated properly
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* right away.
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*/
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signal(SIGWINCH, sigwinch);
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while(1) {
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