On Wednesday, June 4, 2003, at 12:21 PM, Rasmus Lerdorf wrote:
Uh, the number of open() calls really shouldn't change. Are you sure you
are comparing the same code?
Yes. I am sure.
And how are you testing?
I attach fs_usage to the running httpd process and hit the script a single time.
http://developer.apple.com/techpubs/macosx/Essentials/Performance/ PerformanceTools/fs_usage_Fi_alysis_Tool.html
Here is the full trace for accessing a zero length file called control.php:
(notice how each directory gets opened three times. in 4.1.2 each directory gets opened twice.)
read F=3 B=0x1c5
stat /Library/WebServer/Documents/rot/bench/control.php
open [ 2] /Library/WebServer/Documents/rot/.htaccess
open [ 2] /Library/WebServer/Documents/rot/bench/.htaccess
stat
stat .
chdir /Library/WebServer/Documents/rot/bench
open F=4 .
chdir /Library/WebServer/Documents/rot/bench
lstat control.php
stat
lstat .
open F=5 ..
fstat F=5
fstatfs F=5
fstat F=5
getdirentries F=5 B=0x68
lseek F=5 O=0x00000000
close F=5
lstat ..
open F=5 ../..
fstat F=5
fstatfs F=5
fstat F=5
getdirentries F=5 B=0x208
lseek F=5 O=0x00000000
close F=5
lstat ../..
open F=5 ../../..
fstat F=5
fstatfs F=5
fstat F=5
getdirentries F=5 B=0x58
lseek F=5 O=0x00000000
close F=5
lstat ../../..
open F=5 ../../../..
fstat F=5
fstatfs F=5
fstat F=5
getdirentries F=5 B=0x2ac
lseek F=5 O=0x00000000
close F=5
lstat ../../../..
open F=5 ../../../../..
fstat F=5
fstatfs F=5
fstat F=5
getdirentries F=5 B=0x218
lseek F=5 O=0x00000000
close F=5
lstat ../../../../..
fchdir F=4
close F=4
stat
stat .
stat
lstat .
open F=4 ..
fstat F=4
fstatfs F=4
fstat F=4
getdirentries F=4 B=0x68
lseek F=4 O=0x00000000
close F=4
lstat ..
open F=4 ../..
fstat F=4
fstatfs F=4
fstat F=4
getdirentries F=4 B=0x208
lseek F=4 O=0x00000000
close F=4
lstat ../..
open F=4 ../../..
fstat F=4
fstatfs F=4
fstat F=4
getdirentries F=4 B=0x58
lseek F=4 O=0x00000000
close F=4
lstat ../../..
open F=4 ../../../..
fstat F=4
fstatfs F=4
fstat F=4
getdirentries F=4 B=0x2ac
lseek F=4 O=0x00000000
close F=4
lstat ../../../..
open F=4 ../../../../..
fstat F=4
fstatfs F=4
fstat F=4
getdirentries F=4 B=0x218
lseek F=4 O=0x00000000
close F=4
lstat ../../../../..
open F=4 .
chdir /Library/WebServer/Documents/rot/bench
lstat control.php
stat
lstat .
open F=5 ..
fstat F=5
fstatfs F=5
fstat F=5
getdirentries F=5 B=0x68
lseek F=5 O=0x00000000
close F=5
lstat ..
open F=5 ../..
fstat F=5
fstatfs F=5
fstat F=5
getdirentries F=5 B=0x208
lseek F=5 O=0x00000000
close F=5
lstat ../..
open F=5 ../../..
fstat F=5
fstatfs F=5
fstat F=5
getdirentries F=5 B=0x58
lseek F=5 O=0x00000000
close F=5
lstat ../../..
open F=5 ../../../..
fstat F=5
fstatfs F=5
fstat F=5
getdirentries F=5 B=0x2ac
lseek F=5 O=0x00000000
close F=5
lstat ../../../..
open F=5 ../../../../..
fstat F=5
fstatfs F=5
fstat F=5
getdirentries F=5 B=0x218
lseek F=5 O=0x00000000
close F=5
lstat ../../../../..
fchdir F=4
close F=4
open F=4 /Library/WebServer/Documents/rot/bench/control.php
fstat F=4
fstat F=4
lseek F=4 O=0x00000000
lseek F=4 O=0x00000000
fstat F=4
read F=4 B=0x0
close F=4
chdir
lstat /usr/share/zoneinfo/GMT
open F=4 /usr/share/zoneinfo/GMT
fstat F=4
read F=4 B=0x38
close F=4
write F=3 B=0xee
lstat private/etc/localtime
open F=4 /usr/share/zoneinfo/America/Detroit
fstat F=4
read F=4 B=0x32b
close F=4
write F=17 B=0x9a
read F=3 B=0x0
close F=3
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