DSCHED and interbench

看板DFBSD_kernel作者me.時間15年前 (2011/02/22 03:01)推噓0(0推 0噓 0→)

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--0023543a2ab293d5bd049ccc173d Content-Type: text/plain; charset=UTF-8 Hi, Just have some numbers for interbench comparing dsched none to dsched FQ. These numbers are from a 12/31/2010 kernel, on an Atom N270 running an SMP kernel. The disk was an ata/100 disk connected via a USB bridge. Interbench dsched noop (Audio) Test Latency/SD (ms) Max latency % cpu % deadlines hit None 0.03 +/- 0.0306 0.057 100 100 Video 0.045 +/- 0.033 8.04 100 100 X 0.033 +/- 0.033 0.074 100 100 Burn 0.051 +/- 0.266 6.45 100 100 Write 2.55 +/- 13.5 119 98.5 97.8 Read 0.132 ++/ 1.09 26.5 100 100 Compile 2.67 +/- 13.4 131 99 98.7 Memload 2.41 +/- 29.6 634 96.6 96.6 (Video) Test Latency/SD (ms) Max latency % cpu % deadlines hit None 0.06 +/- 0.88 33.4 99.9 99.9 X 0.097 +/- 1.86 65.9 99.8 99.8 Burn 33.7 +/- 93.6 535 45.1 43.4 Write 3.03 +/- 11.7 169 89.2 86.9 Read 0.108 +/- 0.87 36.2 99.9 99.9 Compile 25.8 +/- 60.7 434 49.6 40.1 Memload 1.69 +/- 23.8 603 95.3 94.7 dsched fq (Audio) Test Latency/SD (ms) Max latency % cpu % deadlines hit None 0.087 +/- 1.06 24.2 100 100 Video 0.076 +/- 0.598 10.4 100 100 X 0.195 +/- 3.91 95.7 100 99.8 Burn 0.095 +/- 0.778 13.6 100 100 Write 2.1 +/- 10.8 134 99.2 99 Read 0.128 +/- 0.655 11.4 100 100 Compile 1.13 +/- 4.65 28.9 100 100 Memload 2.54 +/- 19.5 309 95.8 95.8 (Video) Test Latency/SD (ms) Max latency % cpu % deadlines hit None 0.087 +/- 2.26 95.8 99.8 99.8 X 0.14 +/- 1.57 28.3 100 100 Burn 36.7 +/- 103 615 42.6 40.9 Write 2.97 +/- 12 217 90.1 87.8 Read 0.11 +/- 0.99 33.8 99.8 99.8 Compile 29.8 +/- 76.2 608 46.3 38.4 Memload 1.25 +/- 14.1 317 95.4 94.5 More numbers from disabling bioqdisksort() and some discussion will follow, but just wanted to put these out. -- vs --0023543a2ab293d5bd049ccc173d Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: base64 SGksPGJyPjxicj5KdXN0IGhhdmUgc29tZSBudW1iZXJzIGZvciBpbnRlcmJlbmNoIGNvbXBhcmlu ZyBkc2NoZWQgbm9uZSB0byBkc2NoZWQgRlEuPGJyPjxicj5UaGVzZSBudW1iZXJzIGFyZSBmcm9t IGEgMTIvMzEvMjAxMCBrZXJuZWwsIG9uIGFuIEF0b20gTjI3MCBydW5uaW5nIGFuIFNNUCBrZXJu ZWwuIFRoZSBkaXNrIHdhcyBhbiBhdGEvMTAwIGRpc2sgY29ubmVjdGVkIHZpYSBhIFVTQiBicmlk Z2UuPGJyPgoKPGJyPkludGVyYmVuY2ggPGJyPmRzY2hlZCBub29wPGJyPjxicj4oQXVkaW8pPGJy PlRlc3TCoMKgwqAgTGF0ZW5jeS9TRCAobXMpIE1heCBsYXRlbmN5wqDCoMKgICUgY3B1wqDCoMKg 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