From 88cf37d2a86d5b66380003d7c3384530e3f91e40 Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Fri, 8 Jul 2016 12:01:08 -0400
Subject: [PATCH] Add some temporary code to record stack usage at server
process exit.
This patch is meant to gather information from the buildfarm members, and
will be reverted in a day or so. The idea is to try to find out the
high-water stack consumption while running the regression tests,
particularly on IA64 which is suspected to use much more stack than other
architectures. On machines with pmap, we can use that; but the IA64 farm
members are running HPUX, so also include some bespoke code for HPUX.
(I've tested the latter on HPUX 10/HPPA; not entirely sure it will work
on HPUX 11/IA64, but we'll soon find out.)
Discussion: <CAM-w4HMwwcwaVvYcAH0_FGtG5GeXdYVRfvG81pXnSJWHnCfosQ@mail.gmail.com>
---
src/backend/storage/ipc/ipc.c | 47 +++++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
diff --git a/src/backend/storage/ipc/ipc.c b/src/backend/storage/ipc/ipc.c
index cc36b80699b..b71d10ea8f4 100644
--- a/src/backend/storage/ipc/ipc.c
+++ b/src/backend/storage/ipc/ipc.c
@@ -22,6 +22,10 @@
#include <signal.h>
#include <unistd.h>
#include <sys/stat.h>
+#if defined(__hpux)
+#include <sys/param.h>
+#include <sys/pstat.h>
+#endif
#include "miscadmin.h"
#ifdef PROFILE_PID_DIR
@@ -80,6 +84,46 @@ static int on_proc_exit_index,
before_shmem_exit_index;
+/* Report process's stack consumption to stderr */
+static void
+report_stack_size(void)
+{
+#if defined(__hpux)
+ /* HPUX: examine process's memory map with pstat_getprocvm() */
+ int targetpid = getpid();
+ struct pst_vm_status buf;
+ int res;
+ int ndx;
+
+ for (ndx = 0;; ndx++)
+ {
+ res = pstat_getprocvm(&buf, sizeof(buf), targetpid, ndx);
+ if (res < 0)
+ {
+ perror("getprocvm");
+ break;
+ }
+ if (res != 1)
+ break;
+ if (buf.pst_type != PS_STACK)
+ continue;
+ fprintf(stderr, "%d: stack addr 0x%lx, length %ld, physical pages %ld\n",
+ targetpid,
+ buf.pst_vaddr,
+ buf.pst_length,
+ buf.pst_phys_pages);
+ }
+#else /* non HPUX */
+ /* Otherwise: try to use pmap. No error if that doesn't work. */
+ char sysbuf[128];
+
+ snprintf(sysbuf, sizeof(sysbuf), "pmap -x %d | grep -i stack 1>&2",
+ (int) getpid());
+ (void) system(sysbuf);
+#endif
+}
+
+
/* ----------------------------------------------------------------
* proc_exit
*
@@ -101,6 +145,9 @@ proc_exit(int code)
/* Clean up everything that must be cleaned up */
proc_exit_prepare(code);
+ /* report stack size to stderr */
+ report_stack_size();
+
#ifdef PROFILE_PID_DIR
{
/*
--
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