Binutils with MCST patches
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Yao Qi 6c177e28ea Send qXfer:traceframe-info:read when traceframe is selected.
When I do 'si', I find many 'qXfer:traceframe-info:read' packets are sent,
which is not necessary.  It slows down the single step.
(gdb) si
Sending packet: $qTStatus#49...Packet received: T0;tnotrun:0;tframes:0;tcreated:0;tfree:500000;tsize:500000;circular:0;disconn:0;starttime:0;stoptime:0;username:;notes::
Sending packet: $Z0,80483c7,1#b4...Packet received: OK
Sending packet: $Z0,4ce5b6b0,1#6e...Packet received: OK
Sending packet: $QPassSignals:e;10;14;17;1a;1b;1c;21;24;25;2c;4c;#5f...Packet received: OK
Sending packet: $vCont;s:p1b15.1b15;c#20...Packet received: T0505:44efffbf;04:44efffbf;08:d1830408;thread:p1b15.1b15;core:3;
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $mbfffef40,40#c0...Packet received: d183040878efffbf2e840408030000000000a040030000000500000070efffbf07000000010000004984040807000000030000000500000000000000b396e84c
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $z0,80483c7,1#d4...Packet received: OK
Sending packet: $z0,4ce5b6b0,1#8e...Packet received: OK
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01
Sending packet: $qXfer:traceframe-info:read::0,fff#0b...Packet received: E01

This problem was introduced by this patch
(https://sourceware.org/ml/gdb-patches/2013-04/msg00000.html), in
which get_traceframe_number is not checked before calling
traceframe_available_memory.  This patch moves the check to
remote_traceframe_info, say, if GDB doesn't have traceframe selected, GDB
doesn't need to send qXfer:traceframe-info:read packets.

With this patch applied, there is no qXfer:traceframe-info:read sent
out and single step is speed up a little bit.

Here is the experiment I did:

	   Num of single step	Original	Patched

single-step cpu_time 10000	8.08		7.57
single-step cpu_time 20000	16.23		14.23
single-step cpu_time 30000	24.19		21.59
single-step cpu_time 40000	32.49		28.0
single-step wall_time 10000	14.1974210739	13.2641420364
single-step wall_time 20000	28.5278921127	25.0541369915
single-step wall_time 30000	42.5864038467	38.0038759708
single-step wall_time 40000	57.2107698917	49.2350611687
single-step vmsize 10000	16128		16388
single-step vmsize 20000	16128		16388
single-step vmsize 30000	16260		16520
single-step vmsize 40000	16444		16704

The patch is tested on x86_64-linux.

gdb:

2013-10-24  Yao Qi  <yao@codesourcery.com>

	* remote.c (remote_traceframe_info): Return early if
	traceframe is not selected.
2013-10-25 14:03:01 +00:00
bfd binutils doc update 2013-10-25 14:02:58 +00:00
binutils binutils doc update 2013-10-25 14:02:58 +00:00
config 2013-10-16 Jan-Benedict Glaw <jbglaw@lug-owl.de> 2013-10-16 20:45:20 +00:00
cpu PR binutils/15241 2013-03-08 17:25:12 +00:00
elfcpp elfcpp/ 2013-03-01 22:45:56 +00:00
etc
gas Change mode of gas/configure back to 0755 2013-10-25 14:03:00 +00:00
gdb Send qXfer:traceframe-info:read when traceframe is selected. 2013-10-25 14:03:01 +00:00
gold * output.h (Output_data_got::add_constant): Tidy. 2013-10-14 02:53:01 +00:00
gprof PR gprof/16027 2013-10-09 16:34:30 +00:00
include Fix up a couple oddities in GDB's signal names and strings. 2013-10-25 14:02:58 +00:00
intl
ld * ld-cris/asneed1.d: New test. 2013-10-18 02:38:35 +00:00
libdecnumber merge from gcc 2013-10-16 00:29:48 +00:00
libiberty merge from gcc 2013-10-16 00:29:48 +00:00
opcodes Fix neon vshll disassembly. 2013-10-15 13:30:40 +00:00
readline * readline.c (bind_arrow_keys_internal): 2013-09-24 14:49:48 +00:00
sim * Makefile.in (srcsim): New variable. 2013-10-15 20:42:07 +00:00
texinfo
.cvsignore
.gitignore Sync the root .gitignore file with GCC's. 2013-01-11 15:17:35 +00:00
ChangeLog 2013-10-16 Jan-Benedict Glaw <jbglaw@lug-owl.de> 2013-10-16 20:36:39 +00:00
compile
config-ml.in
config.guess * config.guess: Update from config repo. 2013-04-29 15:13:53 +00:00
config.rpath
config.sub * config.guess: Update from config repo. 2013-04-29 15:13:53 +00:00
configure 2013-10-16 Jan-Benedict Glaw <jbglaw@lug-owl.de> 2013-10-16 20:36:39 +00:00
configure.ac 2013-10-16 Jan-Benedict Glaw <jbglaw@lug-owl.de> 2013-10-16 20:36:39 +00:00
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS 2013-01-07 Jeff Johnston <jjohnstn@redhat.com> 2013-01-07 21:39:26 +00:00
COPYING.NEWLIB 2013-10-01 Jeff Johnston <jjohnstn@redhat.com> 2013-10-01 18:14:04 +00:00
depcomp
djunpack.bat
install-sh
libtool.m4 * libtool.m4 (_LT_ENABLE_LOCK <ld -m flags>): Remove non-canonical 2013-09-20 09:51:25 +00:00
lt~obsolete.m4
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS
Makefile.def 2013-08-12 Jan-Benedict Glaw <jbglaw@lug-owl.de> 2013-08-12 11:36:35 +00:00
Makefile.in 2013-08-12 Jan-Benedict Glaw <jbglaw@lug-owl.de> 2013-08-12 11:36:35 +00:00
Makefile.tpl * Makefile.tpl (BOOT_ADAFLAGS): Remove -gnata. 2013-01-11 11:48:54 +00:00
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
README
README-maintainer-mode
setup.com
src-release * src-release (do-proto-toplevel): Support subdir-path-prefixed 2013-10-15 20:45:52 +00:00
symlink-tree
ylwrap

		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
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If you are receiving this as part of a GDB release, see the file gdb/README.
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run the ``configure'' script here, e.g.:

	./configure 
	make

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then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
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also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
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