-------- Forwarded Message --------
Subject: Re: v2.19.47 on Mac x86
Date: Sun, 4 Sep 2016 15:16:03 -0500
From: Patrick Karl <jpk...@gmail.com>
To: Jacques Menu Muzhic <imj-muz...@bluewin.ch>
<trying again>
Message: 5
Date: Sun, 4 Sep 2016 17:41:42 +0200
From: Jacques Menu Muzhic <imj-muz...@bluewin.ch>
To: Andrew Bernard <andrew.bern...@gmail.com>
Cc: Jacques Menu Muzhic <imj-muz...@bluewin.ch>, lilypond-user
<lilypond-user@gnu.org>
Subject: Re: v2.19.47 on Mac x86
I run El Capitan 10.11.6:
menu@macbookprojm:~/Documents/LaTeX/PartitionsLilypond > uname -a
Darwin macbookprojm 15.6.0 Darwin Kernel Version 15.6.0: Mon Aug 29
20:21:34 PDT 2016; root:xnu-3248.60.11~1/RELEASE_X86_64 x86_64
and I get:
menu@macbookprojm:~ > sudo dtruss lilypond --version
I run El Capitan 10.11.6 and get the exact same output for “uname -a”.
I wanted to see what the difference was between v2.19.46 and v2.19.47,
so I ran them both on the following file:
bash-3.2$ cat 1note.ly
\version "2.19.46"
{ c4 }
bash-3.2$ time lilypond 1note.ly
GNU LilyPond 2.19.46
Processing `1note.ly'
Parsing...
Interpreting music...
Preprocessing graphical objects...
Finding the ideal number of pages...
Fitting music on 1 page...
Drawing systems...
Layout output to `/tmp/lilypond-22EfXs'...
Converting to `1note.pdf'...
Deleting `/tmp/lilypond-22EfXs'...
Success: compilation successfully completed
real 0m0.820s
user 0m0.638s
sys 0m0.093s
bash-3.2$ LP47=$l47
bash-3.2$ echo $LP47
/Users/pat/Downloads/LilyPond.app/Contents/Resources/bin/lilypond
bash-3.2$ time $LP47 1note.ly
GNU LilyPond 2.19.47
Processing `1note.ly'
Parsing...
Interpreting music...
Preprocessing graphical objects...
Finding the ideal number of pages...
Fitting music on 1 page...
Drawing systems...
Layout output to `/tmp/lilypond-B2ws6y'...
Converting to `1note.pdf'...
Deleting `/tmp/lilypond-B2ws6y'...
Success: compilation successfully completed
real 1m2.364s
user 0m46.848s
sys 0m15.145s
I then ran dtruss -c on both versions to see what the difference in
system calls was.
The following table shows the number of system calls which have a Count
100 for the v2.19.47 version and the corresponding count for the
v2.19.46 version:
CALL COUNT LP46 COUNT LP47
… … …
getattrlist 112 128
stat 178 171
stat64 207 207
sigaltstack 222 228
sigprocmask 263 269
select_nocancel 320 323
lseek 57 123013
read_nocancel 341 125474
I then did a count of the number of lseeks on file descriptors <= 13 (at
first glance there are no file descriptors greater than 12:
lseek(0xfiledes v46 v47
lseek(0x0 1 23
lseek(0x1 1 1
lseek(0x2 1 1
lseek(0x3 2 2
lseek(0x4 0 0
lseek(0x5 0 0
lseek(0x6 2 2
lseek(0x7 35 35
lseek(0x8 8 122969
lseek(0x9 3 3
lseek(0xA 1 1
lseek(0xB 3 3
lseek(0xC 0 0
Hopefully, this information might be of use to someone trying to figure
this problem out.
The most salient questions would be: what is filedes 8 used for? And
why is this problem only occurring on Macs?
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