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| author | Siddhesh Poyarekar <siddhesh@redhat.com> | 2013-10-11 22:37:53 +0530 |
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| committer | Siddhesh Poyarekar <siddhesh@redhat.com> | 2013-10-11 22:37:53 +0530 |
| commit | 10e1cf6b73f1598e57d24933a0949dbeffa2c8a0 (patch) | |
| tree | 2dd2ce2fe7144de439047f6dddbeb2f660746d94 /sysdeps/ieee754/dbl-64/e_log.c | |
| parent | 3d110c7c6e6549bd4124fce49cdc672f9e449799 (diff) | |
| download | glibc-10e1cf6b73f1598e57d24933a0949dbeffa2c8a0.tar.gz glibc-10e1cf6b73f1598e57d24933a0949dbeffa2c8a0.tar.xz glibc-10e1cf6b73f1598e57d24933a0949dbeffa2c8a0.zip | |
Add systemtap markers to math function slow paths
Add systemtap probes to various slow paths in libm so that application developers may use systemtap to find out if their applications are hitting these slow paths. We have added probes for pow, exp, log, tan, atan and atan2.
Diffstat (limited to 'sysdeps/ieee754/dbl-64/e_log.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/e_log.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sysdeps/ieee754/dbl-64/e_log.c b/sysdeps/ieee754/dbl-64/e_log.c index f9300f9cef..17ab75aa39 100644 --- a/sysdeps/ieee754/dbl-64/e_log.c +++ b/sysdeps/ieee754/dbl-64/e_log.c @@ -39,6 +39,7 @@ #include "mpa.h" #include "MathLib.h" #include <math_private.h> +#include <stap-probe.h> #ifndef SECTION # define SECTION @@ -242,8 +243,12 @@ stage_n: __mp_dbl (&mpy1, &y1, p); __mp_dbl (&mpy2, &y2, p); if (y1 == y2) - return y1; + { + LIBC_PROBE (slowlog, 3, &p, &x, &y1); + return y1; + } } + LIBC_PROBE (slowlog_inexact, 3, &p, &x, &y1); return y1; } |