From: Luca Barbieri <ldb@ldb.ods.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Linus Torvalds <torvalds@transmeta.com>,
Linux-Kernel ML <linux-kernel@vger.kernel.org>,
Alexandre Julliard <julliard@winehq.com>
Subject: Re: [patch] tls-2.5.31-C3
Date: 12 Aug 2002 14:18:27 +0200 [thread overview]
Message-ID: <1029154707.4258.28.camel@ldb> (raw)
In-Reply-To: <Pine.LNX.4.44.0208112326580.29560-200000@localhost.localdomain>
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> Comments?
Numbers:
unconditional copy of 2 tls descs: 5 cycles
this patch with 1 tls desc: 26 cycles
this patch with 8 tls descs: 52 cycles
lldt: 51 cycles
lgdt: 50 cycles
context switch: 2000 cycles (measured with pipe read/write and vmstat so
it's not very accurate)
So this patch causes a 1% context switch performance drop for
multithreaded applications.
Note: the benchmark doesn't include the initial test for non-zero
nr_tls_bytes and doesn't include setting the LDT descriptor
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next prev parent reply other threads:[~2002-08-12 12:14 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-07 18:10 [patch] tls-2.5.30-A1 Ingo Molnar
2002-08-07 18:33 ` Linus Torvalds
2002-08-07 18:43 ` Stephen Rothwell
2002-08-07 18:57 ` Linus Torvalds
2002-08-07 19:40 ` Alexandre Julliard
2002-08-07 19:31 ` Ingo Molnar
2002-08-07 19:49 ` Alexandre Julliard
2002-08-07 22:01 ` Alan Cox
2002-08-07 22:36 ` Luca Barbieri
2002-08-07 22:54 ` Ingo Molnar
2002-08-07 23:21 ` Luca Barbieri
2002-08-07 23:35 ` DMA Problems with Intel 845 Chipset and Northwood CPU Mark Cuss
2002-08-08 0:58 ` John L. Korpi
2002-08-08 16:12 ` Mark Cuss
2002-08-11 21:46 ` [patch] tls-2.5.31-C3 Ingo Molnar
2002-08-12 7:34 ` Stephen Rothwell
2002-08-12 10:07 ` Ingo Molnar
2002-08-12 8:23 ` Stephen Rothwell
2002-08-12 10:08 ` Alan Cox
2002-08-12 10:49 ` Ingo Molnar
2002-08-12 10:34 ` Alan Cox
2002-08-12 12:17 ` Ingo Molnar
2002-08-12 11:47 ` Alan Cox
2002-08-12 12:55 ` Ingo Molnar
2002-08-12 12:29 ` Alan Cox
2002-08-12 10:35 ` Alan Cox
2002-08-12 13:10 ` Kasper Dupont
2002-08-12 15:20 ` Ingo Molnar
2002-08-12 14:46 ` Stephen Rothwell
2002-08-12 12:18 ` Luca Barbieri [this message]
2002-08-12 15:12 ` Ingo Molnar
2002-08-12 13:43 ` Luca Barbieri
2002-08-12 15:57 ` Ingo Molnar
2002-08-12 14:17 ` Luca Barbieri
2002-08-12 15:53 ` [patch] tls-2.5.31-D3 Ingo Molnar
2002-08-12 16:13 ` [patch] tls-2.5.31-D4 Ingo Molnar
2002-08-12 14:32 ` Luca Barbieri
2002-08-12 17:06 ` [patch] tls-2.5.31-D5 Ingo Molnar
2002-08-12 15:21 ` Jakub Jelinek
2002-08-12 17:41 ` Ingo Molnar
2002-08-12 15:54 ` Luca Barbieri
2002-08-12 18:03 ` [patch] tls-2.5.31-D9 Ingo Molnar
2002-08-13 1:50 ` [patch] tls-2.5.31-D5 Alexandre Julliard
2002-08-12 17:24 ` [patch] tls-2.5.31-D7 Ingo Molnar
2002-08-12 15:45 ` Christoph Hellwig
2002-08-07 19:02 ` [patch] tls-2.5.30-A1 Christoph Hellwig
2002-08-08 12:25 ` Jamie Lokier
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