Date: Fri, 08 Oct 2004 00:26:13 +0200 From: Pawel Worach <pawel.worach@telia.com> To: freebsd-threads@freebsd.org Subject: BIND9 and libpthread performance Message-ID: <4165C285.9050909@telia.com>
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Hi,
I did some simple benchmarking with libpthread vs. libc_r and BIND.
The numbers puzzle me. Are pthreads supposed to this much slower?
Tests done using BIND9 with a authoritative root zone. The queryperf
tool from bind-9.3.0/contrib/queryperf was used to get the numbers.
Queries where done for ". SOA". (queryperf -s 127.0.0.1 -l 30)
This is on -CURRENT from Oct 6th, WITNESS, INVARIANTS off and
libpthread built without _LOCK_DEBUG and _PTHREADS_INVARIANTS.
Hardware is a dual IBM x345 2.8ghz Xeon box with HTT on. SCHED_4BSD,
PREEMPTION and ADAPTIVE_GIANT are in the kernel config, malloc.conf
symlinked to 'aj'.
Results (queries per second according to queryperf):
x libpthread-system-scope
+ libc_r
+--------------------------------------------------------------------------+
|x +++ + +|
|A |__M__A______| |
+--------------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 5 2074.3131 2094.7966 2087.3796 2086.4217 7.579802
+ 5 8179.1707 9535.1741 8448.1802 8763.1869 619.70126
Difference at 95.0% confidence
6676.77 +/- 639.13
320.01% +/- 30.6328%
(Student's t, pooled s = 438.228)
Any ideas why the difference is so big, is there anything else to tune?
--
Pawel
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