linux-kernel - Re: dynamic linking files slow fork down significantly

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <45EA9BFA.70401@cosmosbay.com>
Date:	Sun, 04 Mar 2007 11:14:18 +0100
From:	Eric Dumazet <dada1@...mosbay.com>
To:	David Lang <david.lang@...italinsight.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: dynamic linking files slow fork down significantly

David Lang a écrit :
> On Sat, 3 Mar 2007, Eric Dumazet wrote:
>>
>> # time ldd -r ./groff
>>        libstdc++.so.5 => /usr/lib/libstdc++.so.5 (0xf7e8f000)
>>        libm.so.6 => /lib/tls/libm.so.6 (0xf7e6d000)
>>        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xf7e62000)
>>        libc.so.6 => /lib/tls/libc.so.6 (0x42000000)
>>        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0xf7f4c000)
>> 0.00user 0.00system 0:00.00elapsed 50%CPU (0avgtext+0avgdata 
>> 0maxresident)k
>> 0inputs+0outputs (0major+777minor)pagefaults 0swaps
>>
>> You can see 777 pagefaults instead of 696 on this example.
> 
> the version of time on my system (debian 3.1) doesn't give me the cpu or 
> pagefault info, just the times. where should I get the version that 
> gives more info? (although I don't think I can apply it directly to my 
> troubleshooting as the work is all being done in child processes).

time is a shell builtin.
But there is normally an /usr/bin/time standalone program.

# type time
time is a shell keyword
# time date
Sun Mar  4 12:15:54 CET 2007

real    0m0.003s
user    0m0.000s
sys     0m0.000s

# /usr/bin/time date
Sun Mar  4 12:15:56 CET 2007
0.00user 0.00system 0:00.00elapsed ?%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+192minor)pagefaults 0swaps
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/