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c99402d080
urbit/n/t.c
C. Guy Yarvin 69f265fcd1 GHETTO timestamp tracing.
2015-02-19 15:22:51 -08:00

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/* g/t.c
**
** This file is in the public domain.
*/
#include "all.h"
#include <pthread.h>
/* u3t_push(): push on trace stack.
*/
void
u3t_push(u3_noun mon)
{
u3R->bug.tax = u3nc(mon, u3R->bug.tax);
}
/* u3t_mean(): push `[%mean roc]` on trace stack.
*/
void
u3t_mean(u3_noun roc)
{
u3R->bug.tax = u3nc(u3nc(c3__mean, roc), u3R->bug.tax);
}
/* u3t_drop(): drop from meaning stack.
*/
void
u3t_drop(void)
{
c3_assert(_(u3du(u3R->bug.tax)));
{
u3_noun tax = u3R->bug.tax;
u3R->bug.tax = u3k(u3t(tax));
u3z(tax);
}
}
extern void
u3_lo_tank(c3_l tab_l, u3_noun tac);
/* u3t_slog(): print directly.
*/
void
u3t_slog(u3_noun hod)
{
#ifdef GHETTO
static int old;
static struct timeval b4, f2, d0;
c3_w ms_w;
if ( old ) {
gettimeofday(&f2, 0);
timersub(&f2, &b4, &d0);
ms_w = (d0.tv_sec * 1000) + (d0.tv_usec / 1000);
printf("%d.%dms ", ms_w, (d0.tv_usec % 1000) / 10);
}
gettimeofday(&b4, 0);
old = 1;
#endif
if ( c3y == u3du(hod) ) {
u3_noun pri = u3h(hod);
switch ( pri ) {
case 3: printf(">>> "); break;
case 2: printf(">> "); break;
case 1: printf("> "); break;
}
u3_lo_tank(0, u3k(u3t(hod)));
}
u3z(hod);
}
/* u3t_heck(): profile point.
*/
void
u3t_heck(u3_atom cog)
{
// Profile sampling, because it allocates on the home road,
// only works on when we're not at home.
//
if ( &(u3H->rod_u) != u3R ) {
u3a_road* rod_u;
rod_u = u3R;
u3R = &(u3H->rod_u);
{
if ( 0 == u3R->pro.day ) {
u3R->pro.day = u3v_do("doss", 0);
}
u3R->pro.day = u3dc("pi-heck", cog, u3R->pro.day);
}
u3R = rod_u;
}
}
/* _t_jet_label():
*/
u3_weak
_t_jet_label(u3a_road* rod_u, u3_noun bat)
{
while ( 1 ) {
u3_weak cax = u3h_git(rod_u->jed.har_p, bat);
if ( u3_none != cax ) {
return u3h(u3t(u3t(u3h(cax))));
}
if ( rod_u->par_u ) {
rod_u = rod_u->par_u;
}
else return u3_none;
}
}
#if 1
/* _t_samp_process(): process raw sample data from live road.
*/
static u3_noun
_t_samp_process(u3_road* rod_u)
{
u3_noun pef = u3_nul; // (list (pair path (map path ,@ud)))
u3_noun muf = u3_nul; // (map path ,@ud)
c3_w len_w = 0;
// Accumulate a label/map stack which collapses recursive segments.
//
while ( rod_u ) {
u3_noun don = rod_u->pro.don;
while ( u3_nul != don ) {
u3_noun bat = u3h(don);
u3_noun lab;
// Find the label from this battery, surface allocated.
//
{
u3_noun laj = _t_jet_label(rod_u, bat);
if ( u3_none == laj ) { abort(); }
// lab = u3nc(u3i_string("foobar"), u3_nul);
lab = u3a_take(laj); u3a_wash(laj);
}
// Add the label to the traced label stack, trimming recursion.
//
{
u3_noun old;
if ( u3_none == (old = u3kdb_get(u3k(muf), u3k(lab))) ) {
muf = u3kdb_put(muf, u3k(lab), len_w);
pef = u3nc(u3nc(lab, u3k(muf)), pef);
len_w += 1;
}
else {
u3_assure(u3a_is_cat(old));
u3z(muf);
while ( len_w > (old + 1) ) {
u3_noun t_pef = u3k(u3t(pef));
len_w -= 1;
u3z(pef);
pef = t_pef;
}
muf = u3k(u3t(u3h(pef)));
u3z(lab);
}
}
don = u3t(don);
}
rod_u = rod_u->par_u;
}
u3z(muf);
// Lose the maps and save a pure label stack in original order.
//
{
u3_noun pal = u3_nul;
while ( u3_nul != pef ) {
u3_noun h_pef = u3h(pef);
u3_noun t_pef = u3k(u3t(pef));
pal = u3nc(u3k(u3h(h_pef)), pal);
u3z(pef);
pef = t_pef;
}
// fprintf(stderr, "sample: stack length %d\r\n", u3kb_lent(u3k(pal)));
return pal;
}
}
#endif
/* u3t_samp(): sample.
*/
void
u3t_samp(void)
{
u3C.wag_w &= ~u3o_debug_cpu;
// Profile sampling, because it allocates on the home road,
// only works on when we're not at home.
//
if ( &(u3H->rod_u) != u3R ) {
c3_l mot_l;
u3a_road* rod_u;
if ( _(u3T.mal_o) ) {
mot_l = c3_s3('m','a','l');
}
else if ( _(u3T.coy_o) ) {
mot_l = c3_s3('c','o','y');
}
else if ( _(u3T.euq_o) ) {
mot_l = c3_s3('e','u','q');
}
else if ( _(u3T.far_o) ) {
mot_l = c3_s3('f','a','r');
}
else if ( _(u3T.noc_o) ) {
c3_assert(!_(u3T.glu_o));
mot_l = c3_s3('n','o','c');
}
else if ( _(u3T.glu_o) ) {
mot_l = c3_s3('g','l','u');
}
else {
mot_l = c3_s3('f','u','n');
}
rod_u = u3R;
u3R = &(u3H->rod_u);
{
u3_noun lab = _t_samp_process(rod_u);
c3_assert(u3R == &u3H->rod_u);
if ( 0 == u3R->pro.day ) {
u3R->pro.day = u3v_do("doss", 0);
}
u3R->pro.day = u3dt("pi-noon", mot_l, lab, u3R->pro.day);
}
u3R = rod_u;
}
u3C.wag_w |= u3o_debug_cpu;
}
/* u3t_come(): push on profile stack; return yes if active push. RETAIN.
*/
c3_o
u3t_come(u3_noun bat)
{
if ( (u3_nul == u3R->pro.don) || !_(u3r_sing(bat, u3h(u3R->pro.don))) ) {
u3R->pro.don = u3nc(u3k(bat), u3R->pro.don);
return c3y;
}
else return c3n;
}
/* u3t_flee(): pop off profile stack.
*/
void
u3t_flee(void)
{
u3_noun t_don = u3k(u3t(u3R->pro.don));
u3R->pro.don = t_don;
u3z(u3R->pro.don);
}
/* u3t_damp(): print and clear profile data.
*/
void
u3t_damp(void)
{
if ( 0 != u3R->pro.day ) {
u3_noun wol = u3do("pi-tell", u3R->pro.day);
u3m_wall(wol);
u3R->pro.day = u3v_do("doss", 0);
}
#if 0
if ( 0 != u3R->pro.nox_d ) {
printf("knox: %llu\r\n", (u3R->pro.nox_d / 1000ULL));
u3R->pro.nox_d = 0;
}
#endif
}
/* _ct_sigaction(): profile sigaction callback.
*/
void _ct_sigaction(c3_i x_i)
{
// fprintf(stderr, "itimer!\r\n"); abort();
u3t_samp();
}
/* u3t_init(): initialize tracing layer.
*/
void
u3t_init(void)
{
u3T.noc_o = c3n;
u3T.glu_o = c3n;
u3T.mal_o = c3n;
u3T.far_o = c3n;
u3T.coy_o = c3n;
u3T.euq_o = c3n;
}
/* u3t_boot(): turn sampling on.
*/
void
u3t_boot(void)
{
if ( u3C.wag_w & u3o_debug_cpu ) {
#if defined(U3_OS_osx)
#if 1
{
struct itimerval itm_v;
struct sigaction sig_s;
sigset_t set;
sig_s.__sigaction_u.__sa_handler = _ct_sigaction;
sig_s.sa_mask = 0;
sig_s.sa_flags = 0;
sigaction(SIGPROF, &sig_s, 0);
sigemptyset(&set);
sigaddset(&set, SIGPROF);
if ( 0 != pthread_sigmask(SIG_UNBLOCK, &set, NULL) ) {
perror("pthread_sigmask");
}
itm_v.it_interval.tv_sec = 0;
itm_v.it_interval.tv_usec = 10000;
// itm_v.it_interval.tv_usec = 100000;
itm_v.it_value = itm_v.it_interval;
setitimer(ITIMER_PROF, &itm_v, 0);
}
#endif
#elif defined(U3_OS_linux)
// TODO: support profiling on linux
#elif defined(U3_OS_bsd)
// TODO: support profiling on bsd
#else
# error "port: profiling"
#endif
}
}
/* u3t_boff(): turn profile sampling off.
*/
void
u3t_boff(void)
{
if ( u3C.wag_w & u3o_debug_cpu ) {
#if defined(U3_OS_osx)
struct sigaction sig_s;
struct itimerval itm_v;
sigset_t set;
sigemptyset(&set);
sigaddset(&set, SIGPROF);
if ( 0 != pthread_sigmask(SIG_BLOCK, &set, NULL) ) {
perror("pthread_sigmask");
}
itm_v.it_interval.tv_sec = 0;
itm_v.it_interval.tv_usec = 0;
itm_v.it_value = itm_v.it_interval;
setitimer(ITIMER_PROF, &itm_v, 0);
sigaction(SIGPROF, &sig_s, 0);
#elif defined(U3_OS_linux)
// TODO: support profiling on linux
#elif defined(U3_OS_bsd)
// TODO: support profiling on bsd
#else
# error "port: profiling"
#endif
}
}
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