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 PR other/46202: implement install-strip. 2010-11-20 19:37:58 +00:00
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 merge from gcc 2010-09-27 21:01:18 +00:00
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 * texinfo/texinfo.tex: Update to version 2009-03-28.05. 2009-04-21 12:36:46 +00:00
.cvsignore add autom4te.cache to .cvsignore 2007-02-13 15:25:58 +00:00
.gitignore Sync the root .gitignore file with GCC's. 2013-01-11 15:17:35 +00:00
COPYING 2005-07-14 Kelley Cook <kcook@gcc.gnu.org> 2005-07-14 01:24:56 +00:00
COPYING.LIB 2005-07-16 Kelley Cook <kcook@gcc.gnu.org> 2005-07-16 02:41:34 +00:00
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
COPYING3 * COPYING3: New file. Contains version 3 of the GNU General Public License. 2007-07-17 13:50:23 +00:00
COPYING3.LIB * COPYING3: New file. Contains version 3 of the GNU General Public License. 2007-07-17 13:50:23 +00:00
ChangeLog 2013-10-16 Jan-Benedict Glaw <jbglaw@lug-owl.de> 2013-10-16 20:36:39 +00:00
MAINTAINERS MAINTAINERS: clarify policy with config/ (and other top level files) 2012-05-12 03:10:17 +00:00
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
README
README-maintainer-mode Cleanups after the update to Autoconf 2.64, Automake 1.11. 2009-08-22 17:08:11 +00:00
compile Update automake-provided files in the toplevel. 2009-08-22 11:48:33 +00:00
config-ml.in * config-ml.in: Don't handle arc-*-elf*. 2011-03-22 20:01:13 +00:00
config.guess * config.guess: Update from config repo. 2013-04-29 15:13:53 +00:00
config.rpath Remove freebsd1 from libtool.m4 macros and config.rpath. 2011-02-13 21:00:14 +00:00
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
depcomp Update automake-provided files in the toplevel. 2009-08-22 11:48:33 +00:00
djunpack.bat * djunpack.bat: Use ".." quoting in Sed command, for the sake of 2009-03-27 13:37:09 +00:00
install-sh Update automake-provided files in the toplevel. 2009-08-22 11:48:33 +00:00
libtool.m4 * libtool.m4 (_LT_ENABLE_LOCK <ld -m flags>): Remove non-canonical 2013-09-20 09:51:25 +00:00
ltgcc.m4 * libtool.m4: Update to libtool 2.2.6. 2008-09-29 15:28:14 +00:00
ltmain.sh Backport from Libtool: Fix relink mode to use absolute path if hardcode_minus_L. 2011-01-13 18:52:53 +00:00
ltoptions.m4 Sync Libtool from GCC. 2010-01-09 21:11:44 +00:00
ltsugar.m4 * libtool.m4: Update to libtool 2.2.6. 2008-09-29 15:28:14 +00:00
ltversion.m4 Sync Libtool from GCC. 2010-01-09 21:11:44 +00:00
lt~obsolete.m4 Sync Libtool from GCC. 2010-01-09 21:11:44 +00:00
makefile.vms
missing Update automake-provided files in the toplevel. 2009-08-22 11:48:33 +00:00
mkdep
mkinstalldirs Update automake-provided files in the toplevel. 2009-08-22 11:48:33 +00:00
move-if-change Import move-if-change script from gnulib. 2011-02-12 15:47:02 +00:00
setup.com 2009-09-01 Tristan Gingold <gingold@adacore.com> 2009-09-01 13:38:26 +00:00
src-release * src-release (do-proto-toplevel): Support subdir-path-prefixed 2013-10-15 20:45:52 +00:00
symlink-tree 2005-07-14 Kelley Cook <kcook@gcc.gnu.org> 2005-07-14 01:24:56 +00:00
ylwrap Update automake-provided files in the toplevel. 2009-08-22 11:48:33 +00:00

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