Date: Sun, 24 Sep 2006 03:41:57 -0700 From: soralx@cydem.org To: freebsd-hackers@freebsd.org Subject: Re: numbers don't lie ... Message-ID: <200609240341.57424.soralx@cydem.org> In-Reply-To: <E1GQ3cl-000O7T-90@cs1.cs.huji.ac.il> References: <200609141232.k8ECWTXj045191@lurza.secnetix.de> <20060919173421.GA45928@xor.obsecurity.org> <E1GQ3cl-000O7T-90@cs1.cs.huji.ac.il>
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> here are a bunch of new numbers: > make: dell 2950 > OS: Freebsd 6.2-PRERELEASE > cpu: XEON 3.20GHz dualcore * 2 > memory: 4GB > > no swap configured/used. > > make buildworld -j 8: > > src & obj real user system hyper > -------------------- --------- ---------- --------- ----- > Dell PERC 5/i RAID 0 24m17.73s 1h4m31.49s 15m47.44s no > Dell PERC 5/i RAID 0 22m3.39s 1h38m46.84s 28m54.18s yes > iSCSI/netapp 26m49.98s 1h4m26.77s 16m12.89s no > > src obj > -------------------- > md Dell PERC 5/i 24m7.22s 1h4m44.94s 16m24.45 no > > so, if numbers are to be believed: > 1- hypert helps in the real time, but user and system are bigger. > allot of sweat for a very small gain. > 2- src in memory made no change. could it be that the src three was already in the memory, cached? or did you do each test after a reboot? > 3- slow disc (iscsi) vs. very fast disk (PERC 5/i RAID 0) - about 1:3 speed, > produced > less than 10% gain in time. > > danny [SorAlx] ridin' VN1500-B2
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