[Touch-packages] [Bug 868395] Re: Bug in Europe/Russia timezones
2016b. Long live to the bug!
Buggy:
$ dpkg -l | grep tzdata
ii tzdata2016b-0ubuntu0.12.04
time zone and daylight-saving time data
ii tzdata-java 2016b-0ubuntu0.12.04
time zone and daylight-saving time data for use by java runtimes
$ cat ./bug.c
#include
#include
int main() {
time_t t = time(0);
int i;
struct tm result;
for(i=0; i < 1000; i++)
localtime_r(, );
puts(ctime());
return 0;
}
$ gcc ./bug.c
$ time ./a.out
Mon Mar 21 23:56:11 2016
real0m4.607s
user0m4.599s
sys 0m0.002s
$
Patched:
$ dpkg -l | grep tzdata
ii tzdata2016b-0ubuntu0.12.04-yandex1
time zone and daylight-saving time data
ii tzdata-java 2016b-0ubuntu0.12.04-yandex1
time zone and daylight-saving time data for use by java runtimes
$ cat ./bug.c
#include
#include
int main() {
time_t t = time(0);
int i;
struct tm result;
for(i=0; i < 1000; i++)
localtime_r(, );
puts(ctime());
return 0;
}
$ gcc ./bug.c
$ time ./a.out
Mon Mar 21 23:58:19 2016
real0m1.296s
user0m1.292s
sys 0m0.002s
$
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to tzdata in Ubuntu.
https://bugs.launchpad.net/bugs/868395
Title:
Bug in Europe/Russia timezones
Status in tzdata package in Ubuntu:
Confirmed
Bug description:
In version tzdata-2011j (tzdata-2011k also affected) was founded strange bug
in russian timezones.
Because of a law "On the Calculation of Time" there were changes in zone like:
3:00 Russia MSK/MSD 2011
changed to:
3:00 Russia MSK/MSD 2011 Mar 27 2:00s
4:00 - MSK
But if no rule used for this change (using "-" instead of rule "Russia"),
calling of system function localtime_r() takes more time (takes more than 40%
time longer).
I used following code for measuring:
==
#include
#include
int main() {
time_t t = time(0);
int i;
struct tm result;
for(i=0; i < 1000; i++)
localtime_r(, );
puts(ctime());
return 0;
}
==
and also this sql code in mysql db:
select benchmark(100, from_unixtime(1317044847));
For example, when I'm using new tzdata-2011j results are:
1. time ./a.out (c code)
real 0m5.165s
user 0m5.140s
sys 0m0.000s
2. sql query
mysql> select benchmark(100, from_unixtime(1317044847));
+---+
| benchmark(100, from_unixtime(1317044847)) |
+---+
| 0 |
+---+
1 row in set (1.03 sec).
And when I'm using old tzdata-2008b:
1. time ./a.out (c code)
real 0m1.675s
user 0m1.450s
sys 0m0.000s
2. sql query
mysql> select benchmark(100, from_unixtime(1317044847));
+---+
| benchmark(100, from_unixtime(1317044847)) |
+---+
| 0 |
+---+
1 row in set (0.65 sec)
This bug seemed critical on high loaded systems (for example, for
databases that using unix timestamps).
My configuration was:
Description: Ubuntu 8.04.1
Release: 8.04
Packages: 2011j~repack-0ubuntu0.8.04 and 2008b-1ubuntu1
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/tzdata/+bug/868395/+subscriptions
--
Mailing list: https://launchpad.net/~touch-packages
Post to : touch-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~touch-packages
More help : https://help.launchpad.net/ListHelp
[Touch-packages] [Bug 868395] Re: Bug in Europe/Russia timezones
Year 2014. Bug is still here.
Buggy version:
keyd@keyd-desktop:~$ dpkg -l | grep tzdata
ii tzdata 2014i-0ubuntu0.12.04
time zone and daylight-saving time data
ii tzdata-java2014i-0ubuntu0.12.04
time zone and daylight-saving time data for use by java runtimes
keyd@keyd-desktop:~$ time ./a.out
Mon Oct 27 16:46:13 2014
real0m4.061s
user0m4.048s
sys 0m0.000s
keyd@keyd-desktop:~$
Patched version:
keyd@keyd-desktop:~$ dpkg -l | grep tzdata
ii tzdata 2014i-0ubuntu0.12.04-yandex1
time zone and daylight-saving time data
ii tzdata-java2014i-0ubuntu0.12.04-yandex1
time zone and daylight-saving time data for use by java runtimes
keyd@keyd-desktop:~$ time ./a.out
Mon Oct 27 16:47:58 2014
real0m1.263s
user0m1.256s
sys 0m0.000s
keyd@keyd-desktop:~$
--
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to tzdata in Ubuntu.
https://bugs.launchpad.net/bugs/868395
Title:
Bug in Europe/Russia timezones
Status in “tzdata” package in Ubuntu:
Confirmed
Bug description:
In version tzdata-2011j (tzdata-2011k also affected) was founded strange bug
in russian timezones.
Because of a law On the Calculation of Time there were changes in zone like:
3:00 Russia MSK/MSD 2011
changed to:
3:00 Russia MSK/MSD 2011 Mar 27 2:00s
4:00 - MSK
But if no rule used for this change (using - instead of rule Russia),
calling of system function localtime_r() takes more time (takes more than 40%
time longer).
I used following code for measuring:
==
#include time.h
#include stdio.h
int main() {
time_t t = time(0);
int i;
struct tm result;
for(i=0; i 1000; i++)
localtime_r(t, result);
puts(ctime(t));
return 0;
}
==
and also this sql code in mysql db:
select benchmark(100, from_unixtime(1317044847));
For example, when I'm using new tzdata-2011j results are:
1. time ./a.out (c code)
real 0m5.165s
user 0m5.140s
sys 0m0.000s
2. sql query
mysql select benchmark(100, from_unixtime(1317044847));
+---+
| benchmark(100, from_unixtime(1317044847)) |
+---+
| 0 |
+---+
1 row in set (1.03 sec).
And when I'm using old tzdata-2008b:
1. time ./a.out (c code)
real 0m1.675s
user 0m1.450s
sys 0m0.000s
2. sql query
mysql select benchmark(100, from_unixtime(1317044847));
+---+
| benchmark(100, from_unixtime(1317044847)) |
+---+
| 0 |
+---+
1 row in set (0.65 sec)
This bug seemed critical on high loaded systems (for example, for
databases that using unix timestamps).
My configuration was:
Description: Ubuntu 8.04.1
Release: 8.04
Packages: 2011j~repack-0ubuntu0.8.04 and 2008b-1ubuntu1
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/tzdata/+bug/868395/+subscriptions
--
Mailing list: https://launchpad.net/~touch-packages
Post to : touch-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~touch-packages
More help : https://help.launchpad.net/ListHelp
