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PGXP: always-on ring of refused perspective-depth lookups (TCP pgxp_miss_ring)

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Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
This commit is contained in:
Matthew Stanley
2026-10-02 12:00:42 -07:00
parent ce22e54e89
commit 534dcd5df3
3 changed files with 97 additions and 3 deletions
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runtime/src/debug_server.c
+35
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@@ -5353,6 +5353,40 @@ static void handle_pgxp_shadow(int id, const char *json)
send_fmt("%s", buf);
}
/* pgxp_miss_ring — the newest refused perspective-depth lookups (always-on
* ring, PGXP_MISS_RING_CAP deep): {"cmd":"pgxp_miss_ring","count":N}. Each
* entry: packet word address (canonical RAM offset), the word the GPU
* consumed, the word/flags the shadow held, and the reason (untracked,
* mismatch, partial, no_z). Join addr with wtrace_dump to name the writer. */
static void handle_pgxp_miss_ring(int id, const char *json)
{
static const char *const reasons[] = { "?", "untracked", "mismatch",
"partial", "no_z" };
const PGXPWordMiss *ring; uint32_t cap;
uint64_t total = pgxp_word_miss_ring(&ring, &cap);
int count = json_get_int(json, "count", 256);
uint64_t avail = total < cap ? total : cap;
if (count < 0) count = 0;
if ((uint64_t)count > avail) count = (int)avail;
size_t sz = (size_t)count * 160u + 256u;
char *buf = (char *)malloc(sz);
if (!buf) { send_err(id, "oom"); return; }
size_t n = (size_t)snprintf(buf, sz, "{\"id\":%d,\"ok\":true,\"total\":%llu,\"entries\":[",
id, (unsigned long long)total);
for (int i = 0; i < count; i++) {
const PGXPWordMiss *m = &ring[(total - (uint64_t)count + (uint64_t)i) % cap];
n += (size_t)snprintf(buf + n, sz - n,
"%s{\"seq\":%llu,\"addr\":\"0x%08X\",\"packet\":\"0x%08X\","
"\"shadow\":\"0x%08X\",\"flags\":%u,\"live\":%u,\"reason\":\"%s\"}",
i ? "," : "", (unsigned long long)m->seq, m->addr, m->packet,
m->shadow_value, m->shadow_flags, m->live,
reasons[m->reason < 5 ? m->reason : 0]);
}
snprintf(buf + n, sz - n, "]}");
send_fmt("%s", buf);
free(buf);
}
/* pgxp — live-tune the value-propagation engine for one-toggle isolation runs
* without a rebuild: {"cmd":"pgxp","cpu_mode":0|1,"tolerance":F}. Fields are
* optional; the reply echoes the resulting state (same shape as
@@ -14402,6 +14436,7 @@ static const CmdEntry s_commands[] = {
{ "geom_correction", handle_geom_correction },
{ "pgxp", handle_pgxp },
{ "pgxp_shadow", handle_pgxp_shadow },
{ "pgxp_miss_ring", handle_pgxp_miss_ring },
{ "ws_aspect_cone_site", handle_ws_aspect_cone_site },
{ "ws_margin", handle_ws_margin },
{ "ws_hud_mode", handle_ws_hud_mode },