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author | Roland McGrath <roland@gnu.org> | 1996-02-27 00:55:03 +0000 |
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committer | Roland McGrath <roland@gnu.org> | 1996-02-27 00:55:03 +0000 |
commit | 92777700d297c23825e785e6f6a0161bd398705d (patch) | |
tree | 18a993370c7cac36c18f22726cab004f54899122 /sysdeps/mach/hurd/profil.c | |
parent | a182affdd948423d4779f848954e411c94f41a54 (diff) | |
download | glibc-92777700d297c23825e785e6f6a0161bd398705d.zip glibc-92777700d297c23825e785e6f6a0161bd398705d.tar.gz glibc-92777700d297c23825e785e6f6a0161bd398705d.tar.bz2 |
Mon Feb 26 10:22:30 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>cvs/libc-960227
* sysdeps/unix/dirstream.h: Rewritten.
* sysdeps/unix/readdir.c: Rewritten.
* sysdeps/unix/telldir.c: Rewritten.
* sysdeps/unix/closedir.c: Use <...> instead of "..." for dirstream.h.
Remove __ from DIR struct member names.
* sysdeps/unix/dirfd.c: Likewise.
* sysdeps/unix/seekdir.c: Likewise.
* sysdeps/unix/rewinddir.c: Likewise.
* sysdeps/unix/opendir.c: Likewise. Don't allocate extra space after
DIR structure.
* sysdeps/stub/direct.h: File removed.
* sysdeps/unix/bsd/bsd4.4/direct.h: File removed.
* sysdeps/unix/bsd/direct.h: File removed.
* sysdeps/unix/common/direct.h: File removed.
* sysdeps/unix/sysv/irix4/direct.h: File removed.
* sysdeps/unix/sysv/isc3/direct.h: File removed.
* sysdeps/unix/sysv/sco3.2.4/direct.h: File removed.
* sysdeps/unix/sysv/sysv4/solaris2/direct.h: File removed.
* sysdeps/unix/common/direntry.h: New file.
* sysdeps/unix/bsd/direntry.h: New file.
* sysdeps/unix/bsd/bsd4.4/direntry.h: New file.
* sysdeps/unix/sysv/direntry.h: New file.
* sysdeps/stub/direntry.h: New file.
* dirent/dirent.h (struct dirent): Type removed. Include <direntry.h>
to define it.
(_D_EXACT_NAMLEN, _D_ALLOC_NAMLEN): New macros.
* dirent/Makefile (headers): Add direntry.h.
(distribute): Remove direct.h.
* sysdeps/posix/getcwd.c: Use new macros instead of d_namlen.
* dirent/scandir.c: Likewise.
* io/fts.c (fts_build): Likewise.
* io/ftw.c (ftw_dir): Likewise.
* sysdeps/posix/ttyname.c: Likewise.
* sysdeps/unix/sysv/sysv4/solaris2/syscalls.list: New file.
* sysdeps/mach/hurd/profil.c (MAX_PC_SAMPLES): New macro.
(collector_timeout): New static variable.
(update_waiter): Actually call __task_enable_pc_sampling.
Set collector_timeout based on the `tick' count returned.
(profile_waiter): Use MAX_PC_SAMPLES. Set nsamples before RPC.
Use collector_timeout in __mach_msg call.
* gmon/Makefile (noprof): New variable containing mcount.
Append profil unless it is in $(unix-syscalls).
(mcount.po): Use $(noprof) for list of targets in this rule.
* libc-symbols.h: Define _LIBC before #include <config.h>.
Sun Feb 25 12:29:23 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>
* config.h.in [_LIBC] (HAVE_STRERROR): Define it.
Protect 2nd page of #undef's for generator programs with #ifndef _LIBC.
* time/zic.c, time/zdump.c, time/private.h: Updated from ADO's latest.
Fri Feb 9 12:40:19 1996 Brendan Kehoe <brendan@lisa.cygnus.com>
* libio/cleanup.c (_IO_cleanup_registration_needed)
[!_G_HAVE_ATEXIT]: Init to NULL.
* libio/filedoalloc.c (_IO_cleanup_registration_needed): Remove decl.
Thu Feb 8 08:12:50 1996 Brendan Kehoe <brendan@cygnus.com>
* libio/filedoalloc.c (_IO_cleanup_registration_needed): Revert
previous change, since cleanup.c only defines it if _G_HAVE_ATEXIT.
Wed Feb 7 15:10:17 1996 Brendan Kehoe <brendan@lisa.cygnus.com>
* libio/filedoalloc.c (_IO_cleanup_registration_needed): Declare as
extern.
Sat Feb 24 11:34:13 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>
* sysdeps/i386/memcmp.S: Fix argument %esp offsets.
* time/sys/time.h (timeradd, timersub): New macros; BSD has these.
Diffstat (limited to 'sysdeps/mach/hurd/profil.c')
-rw-r--r-- | sysdeps/mach/hurd/profil.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/sysdeps/mach/hurd/profil.c b/sysdeps/mach/hurd/profil.c index 43456ec..431982e 100644 --- a/sysdeps/mach/hurd/profil.c +++ b/sysdeps/mach/hurd/profil.c @@ -1,5 +1,5 @@ /* Low-level statistical profiling support function. Mach/Hurd version. -Copyright (C) 1995 Free Software Foundation, Inc. +Copyright (C) 1995, 1996 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -26,6 +26,8 @@ Cambridge, MA 02139, USA. */ #include <cthreads.h> #include <assert.h> +#define MAX_PC_SAMPLES 512 /* XXX ought to be exported in kernel hdr */ + static thread_t profile_thread = MACH_PORT_NULL; static u_short *samples; static size_t maxsamples; @@ -33,6 +35,7 @@ static size_t pc_offset; static size_t sample_scale; static sampled_pc_seqno_t seqno; static struct mutex lock = MUTEX_INITIALIZER; +static mach_msg_timeout_t collector_timeout; /* ms between collections. */ /* Enable statistical profiling, writing samples of the PC into at most SIZE bytes of SAMPLE_BUFFER; every processor clock tick while profiling @@ -59,7 +62,12 @@ update_waiter (u_short *sample_buffer, size_t size, size_t offset, u_int scale) if (! err) { - if (sample_scale == 0) + int tick; /* Microseconds per sample. */ + err = __task_enable_pc_sampling (__mach_task_self (), &tick, + SAMPLED_PC_PERIODIC); + if (!err && sample_scale == 0) + /* Profiling was not turned on, so the collector thread was + suspended. Resume it. */ err = __thread_resume (profile_thread); if (! err) { @@ -67,6 +75,11 @@ update_waiter (u_short *sample_buffer, size_t size, size_t offset, u_int scale) maxsamples = size / sizeof *sample_buffer; pc_offset = offset; sample_scale = scale; + /* Calculate a good period for the collector thread. From TICK + and the kernel buffer size we get the length of time it takes + to fill the buffer; translate that to milliseconds for + mach_msg, and chop it in half for general lag factor. */ + collector_timeout = MAX_PC_SAMPLES * tick / 1000 / 2; } } @@ -100,17 +113,17 @@ profil (u_short *sample_buffer, size_t size, size_t offset, u_int scale) static void profile_waiter (void) { - sampled_pc_t pc_samples[512]; - mach_msg_type_number_t nsamples = 512, i; + sampled_pc_t pc_samples[MAX_PC_SAMPLES]; + mach_msg_type_number_t nsamples, i; mach_port_t rcv = __mach_reply_port (); mach_msg_header_t msg; - const mach_msg_timeout_t timeout = 17; /* ??? XXX */ error_t err; while (1) { __mutex_lock (&lock); + nsamples = sizeof pc_samples / sizeof pc_samples[0]; err = __task_get_sampled_pcs (__mach_task_self (), &seqno, pc_samples, &nsamples); assert_perror (err); @@ -130,7 +143,7 @@ profile_waiter (void) __mutex_unlock (&lock); __mach_msg (&msg, MACH_RCV_MSG|MACH_RCV_TIMEOUT, 0, sizeof msg, - rcv, timeout, MACH_PORT_NULL); + rcv, collector_timeout, MACH_PORT_NULL); } } |