|
 |
fa3bfd |
Related upstream commit:
|
|
|
fa3bfd |
|
|
|
fa3bfd |
commit 10e1cf6b73f1598e57d24933a0949dbeffa2c8a0
|
|
|
fa3bfd |
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
|
|
|
fa3bfd |
Date: Fri Oct 11 22:37:53 2013 +0530
|
|
|
fa3bfd |
|
|
|
fa3bfd |
Add systemtap markers to math function slow paths
|
|
|
fa3bfd |
|
|
|
12745e |
diff -rup glibc-2.17-c758a686/sysdeps/ieee754/dbl-64/slowexp.c glibc-2.17-c758a686/sysdeps/ieee754/dbl-64/slowexp.c
|
|
|
12745e |
--- glibc-2.17-c758a686/sysdeps/ieee754/dbl-64/slowexp.c 2012-05-20 19:47:38.000000000 -0600
|
|
|
12745e |
+++ glibc-2.17-c758a686/sysdeps/ieee754/dbl-64/slowexp.c 2012-05-21 10:02:51.693957300 -0600
|
|
|
29e444 |
@@ -30,6 +30,8 @@
|
|
|
29e444 |
#include "mpa.h"
|
|
|
29e444 |
#include <math_private.h>
|
|
|
29e444 |
|
|
|
29e444 |
+#include <stap-probe.h>
|
|
|
29e444 |
+
|
|
|
29e444 |
#ifndef SECTION
|
|
|
29e444 |
# define SECTION
|
|
|
29e444 |
#endif
|
|
|
29e444 |
@@ -60,12 +62,21 @@ __slowexp(double x) {
|
|
|
29e444 |
__sub(&mpy,&mpcor,&mpz,p);
|
|
|
29e444 |
__mp_dbl(&mpw, &w, p);
|
|
|
29e444 |
__mp_dbl(&mpz, &z, p);
|
|
|
29e444 |
- if (w == z) return w;
|
|
|
29e444 |
+ if (w == z) {
|
|
|
29e444 |
+ /* Track how often we get to the slow exp code plus
|
|
|
29e444 |
+ its input/output values. */
|
|
|
29e444 |
+ LIBC_PROBE (slowexp_p6, 2, &x, &w);
|
|
|
29e444 |
+ return w;
|
|
|
29e444 |
+ }
|
|
|
29e444 |
else { /* if calculating is not exactly */
|
|
|
29e444 |
p = 32;
|
|
|
29e444 |
__dbl_mp(x,&mpx,p);
|
|
|
29e444 |
__mpexp(&mpx, &mpy, p);
|
|
|
29e444 |
__mp_dbl(&mpy, &res, p);
|
|
|
29e444 |
+
|
|
|
29e444 |
+ /* Track how often we get to the uber-slow exp code plus
|
|
|
29e444 |
+ its input/output values. */
|
|
|
29e444 |
+ LIBC_PROBE (slowexp_p32, 2, &x, &res;;
|
|
|
29e444 |
return res;
|
|
|
29e444 |
}
|
|
|
29e444 |
}
|
|
|
12745e |
diff -rup glibc-2.17-c758a686/sysdeps/ieee754/dbl-64/slowpow.c glibc-2.17-c758a686/sysdeps/ieee754/dbl-64/slowpow.c
|
|
|
12745e |
--- glibc-2.17-c758a686/sysdeps/ieee754/dbl-64/slowpow.c 2012-05-20 19:47:38.000000000 -0600
|
|
|
12745e |
+++ glibc-2.17-c758a686/sysdeps/ieee754/dbl-64/slowpow.c 2012-05-21 10:02:51.694957291 -0600
|
|
|
29e444 |
@@ -34,6 +34,8 @@
|
|
|
29e444 |
#include "mpa.h"
|
|
|
29e444 |
#include <math_private.h>
|
|
|
29e444 |
|
|
|
29e444 |
+#include <stap-probe.h>
|
|
|
29e444 |
+
|
|
|
29e444 |
#ifndef SECTION
|
|
|
29e444 |
# define SECTION
|
|
|
29e444 |
#endif
|
|
|
29e444 |
@@ -65,7 +67,12 @@ __slowpow(double x, double y, double z)
|
|
|
29e444 |
__mp_dbl(&mpr, &res, p);
|
|
|
29e444 |
__sub(&mpp,&eps,&mpr1,p); /* pp -eps =r1 */
|
|
|
29e444 |
__mp_dbl(&mpr1, &res1, p); /* converting into double precision */
|
|
|
29e444 |
- if (res == res1) return res;
|
|
|
29e444 |
+ if (res == res1) {
|
|
|
29e444 |
+ /* Track how often we get to the slow pow code plus
|
|
|
29e444 |
+ its input/output values. */
|
|
|
29e444 |
+ LIBC_PROBE (slowpow_p10, 4, &x, &y, &z, &res;;
|
|
|
29e444 |
+ return res;
|
|
|
29e444 |
+ }
|
|
|
29e444 |
|
|
|
29e444 |
p = 32; /* if we get here result wasn't calculated exactly, continue */
|
|
|
29e444 |
__dbl_mp(x,&mpx,p); /* for more exact calculation */
|
|
|
29e444 |
@@ -75,5 +82,10 @@ __slowpow(double x, double y, double z)
|
|
|
29e444 |
__mul(&mpy,&mpz,&mpw,p); /* y*z =w */
|
|
|
29e444 |
__mpexp(&mpw, &mpp, p); /* e^w=pp */
|
|
|
29e444 |
__mp_dbl(&mpp, &res, p); /* converting into double precision */
|
|
|
29e444 |
+
|
|
|
29e444 |
+ /* Track how often we get to the uber-slow pow code plus
|
|
|
29e444 |
+ its input/output values. */
|
|
|
29e444 |
+ LIBC_PROBE (slowpow_p32, 4, &x, &y, &z, &res;;
|
|
|
29e444 |
+
|
|
|
29e444 |
return res;
|
|
|
29e444 |
}
|