From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <8dd291e254f1e26b6cce215fd0c949c9@terzarima.net>
From: Charles Forsyth <forsyth@terzarima.net>
Date: Mon, 10 Jan 2011 15:06:02 +0000
To: 9fans@9fans.net
In-Reply-To: <AANLkTi=+HXi6-U4423QO85o+wmO+pckX9C0+QkKWqxxp@mail.gmail.com>
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Subject: Re: [9fans] fs performance
Topicbox-Message-UUID: 9376f74c-ead6-11e9-9d60-3106f5b1d025

I think it's fair to say that the IO path for fossil is
> considerably slower than the IO path for kernel-based file systems in
> Linux: slower as in multiples of 10, not multiples. There's a fair
> amount of copying, allocation, and bouncing in and out of the kernel,

for common applications you'd certainly hope that linux is
many times faster than some systems, because it's loading things like this:

% size *
   text	   data	    bss	    dec	    hex	filename
44,520,643	 105232	 350084	44975959	2ae4757	chrome
   9527	    472	      8	  10007	   2717	chrome-sandbox
2,049,594	  12784	1089440	3151818	 3017ca	libffmpegsumo.so
11,711,965	 221500	 192368	12125833	 b90689	libgcflashplayer.so
18,376,687	 122092	  96344	18595123	11bbd33	libpdf.so

% file chrome
chrome: i386 ELF executable

is it statically linked, i wonder? no, all that comes attached to this:

% ldd chrome
	linux-gate.so.1 =>  (0x00c08000)
	libX11.so.6 => /usr/lib/libX11.so.6 (0x00a2d000)
	libdl.so.2 => /lib/libdl.so.2 (0x0050c000)
	libXrender.so.1 => /usr/lib/libXrender.so.1 (0x0089a000)
	libXss.so.1 => /usr/lib/libXss.so.1 (0x0076e000)
	libXext.so.6 => /usr/lib/libXext.so.6 (0x00835000)
	librt.so.1 => /lib/librt.so.1 (0x00110000)
	libgtk-x11-2.0.so.0 => /usr/lib/libgtk-x11-2.0.so.0 (0x00119000)
	libgdk-x11-2.0.so.0 => /usr/lib/libgdk-x11-2.0.so.0 (0x00eea000)
	libgdk_pixbuf-2.0.so.0 => /usr/lib/libgdk_pixbuf-2.0.so.0 (0x00eae000)
	libpangocairo-1.0.so.0 => /usr/lib/libpangocairo-1.0.so.0 (0x004e9000)
	libpango-1.0.so.0 => /usr/lib/libpango-1.0.so.0 (0x00510000)
	libcairo.so.2 => /usr/lib/libcairo.so.2 (0x00552000)
	libgobject-2.0.so.0 => /usr/lib/libgobject-2.0.so.0 (0x00c92000)
	libgthread-2.0.so.0 => /usr/lib/libgthread-2.0.so.0 (0x004f5000)
	libglib-2.0.so.0 => /lib/libglib-2.0.so.0 (0x00689000)
	libnss3.so.1d => /usr/lib/libnss3.so.1d (0x008a4000)
	libnssutil3.so.1d => /usr/lib/libnssutil3.so.1d (0x00865000)
	libsmime3.so.1d => /usr/lib/libsmime3.so.1d (0x00605000)
	libplc4.so.0d => /usr/lib/libplc4.so.0d (0x004fa000)
	libnspr4.so.0d => /usr/lib/libnspr4.so.0d (0x00d5c000)
	libpthread.so.0 => /lib/libpthread.so.0 (0x0062a000)
	libz.so.1 => /lib/libz.so.1 (0x009d7000)
	libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0x00644000)
	libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0x00772000)
	libjpeg.so.62 => /usr/lib/libjpeg.so.62 (0x007e9000)
	libpng12.so.0 => /lib/libpng12.so.0 (0x0080a000)
	libgconf-2.so.4 => /usr/lib/libgconf-2.so.4 (0x009ec000)
	libresolv.so.2 => /lib/libresolv.so.2 (0x00674000)
	libcups.so.2 => /usr/lib/libcups.so.2 (0x00b4a000)
	libgcrypt.so.11 => /lib/libgcrypt.so.11 (0x00b94000)
	libbz2.so.1.0 => /lib/libbz2.so.1.0 (0x00758000)
	libasound.so.2 => /usr/lib/libasound.so.2 (0x00f81000)
	libexpat.so.1 => /lib/libexpat.so.1 (0x00c09000)
	libdbus-glib-1.so.2 => /usr/lib/libdbus-glib-1.so.2 (0x00845000)
	libdbus-1.so.3 => /lib/libdbus-1.so.3 (0x00c30000)
	libXdamage.so.1 => /usr/lib/libXdamage.so.1 (0x004ff000)
	libXtst.so.6 => /usr/lib/libXtst.so.6 (0x00503000)
	libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x21b78000)
	libm.so.6 => /lib/libm.so.6 (0x00c6c000)
	libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x0087e000)
	libc.so.6 => /lib/libc.so.6 (0x1bf3d000)
	libxcb.so.1 => /usr/lib/libxcb.so.1 (0x00d27000)
	/lib/ld-linux.so.2 (0x00dfe000)
	libXinerama.so.1 => /usr/lib/libXinerama.so.1 (0x0076a000)
	libXi.so.6 => /usr/lib/libXi.so.6 (0x009b5000)
	libXrandr.so.2 => /usr/lib/libXrandr.so.2 (0x009c3000)
	libXcursor.so.1 => /usr/lib/libXcursor.so.1 (0x009cb000)
	libXcomposite.so.1 => /usr/lib/libXcomposite.so.1 (0x0082f000)
	libXfixes.so.3 => /usr/lib/libXfixes.so.3 (0x00e88000)
	libatk-1.0.so.0 => /usr/lib/libatk-1.0.so.0 (0x00cd4000)
	libgio-2.0.so.0 => /usr/lib/libgio-2.0.so.0 (0x0c8cc000)
	libpangoft2-1.0.so.0 => /usr/lib/libpangoft2-1.0.so.0 (0x00cef000)
	libgmodule-2.0.so.0 => /usr/lib/libgmodule-2.0.so.0 (0x00a1d000)
	libpixman-1.so.0 => /usr/lib/libpixman-1.so.0 (0x00d90000)
	libxcb-shm.so.0 => /usr/lib/libxcb-shm.so.0 (0x00a21000)
	libxcb-render.so.0 => /usr/lib/libxcb-render.so.0 (0x00a25000)
	libpcre.so.3 => /lib/libpcre.so.3 (0x00e1c000)
	libplds4.so => /usr/lib/libplds4.so (0x00d15000)
	libORBit-2.so.0 => /usr/lib/libORBit-2.so.0 (0x19467000)
	libgssapi_krb5.so.2 => /usr/lib/libgssapi_krb5.so.2 (0x00e51000)
	libgnutls.so.26 => /usr/lib/libgnutls.so.26 (0x06660000)
	libavahi-common.so.3 => /usr/lib/libavahi-common.so.3 (0x00d19000)
	libavahi-client.so.3 => /usr/lib/libavahi-client.so.3 (0x00d41000)
	libgpg-error.so.0 => /lib/libgpg-error.so.0 (0x00d51000)
	libXau.so.6 => /usr/lib/libXau.so.6 (0x00d56000)
	libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0x00df0000)
	libselinux.so.1 => /lib/libselinux.so.1 (0x00e8e000)
	libkrb5.so.3 => /usr/lib/libkrb5.so.3 (0x12d2b000)
	libk5crypto.so.3 => /usr/lib/libk5crypto.so.3 (0x015b3000)
	libcom_err.so.2 => /lib/libcom_err.so.2 (0x00df6000)
	libkrb5support.so.0 => /usr/lib/libkrb5support.so.0 (0x00e80000)
	libkeyutils.so.1 => /lib/libkeyutils.so.1 (0x00dfa000)
	libtasn1.so.3 => /usr/lib/libtasn1.so.3 (0x00ec7000)