Messages in this thread | | | Date | Wed, 08 Sep 2004 22:06:20 -0500 | From | Ray Bryant <> | Subject | Re: swapping and the value of /proc/sys/vm/swappiness |
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Marcelo,
For what it is worth, here are the benchmark results for the kernel with the patch I discussed before, along with the previous 2.6.9-rc1-mm3 results:
Kernel Version 2.6.9-rc1-mm3: Total I/O Avg Swap min max pg cache min max ----------- --------- ------- ------ --------- ------- ------- 0 274.80 MB/s 10511 MB ( 5644, 14492) 13293 MB ( 8596, 17156) 20 267.02 MB/s 12624 MB ( 5578, 16287) 15298 MB ( 8468, 18889) 40 267.66 MB/s 13541 MB ( 6619, 17461) 16199 MB ( 9393, 20044) 60 233.73 MB/s 18094 MB ( 16550, 19676) 20629 MB ( 19103, 22192) 80 213.64 MB/s 20950 MB ( 15844, 22977) 23450 MB ( 18496, 25440) 100 164.58 MB/s 26004 MB ( 26004, 26004) 28410 MB ( 28327, 28455)
Kernel Version 2.6.9-rc1-mm3-kdb-nrmap: Total I/O Avg Swap min max pg cache min max ----------- --------- ------- ------ --------- ------- ------- 0 286.93 MB/s 7288 MB ( 4847, 14536) 10122 MB ( 7771, 17138) 20 252.43 MB/s 13305 MB ( 3950, 18337) 15938 MB ( 6866, 20876) 40 268.52 MB/s 11538 MB ( 5333, 17298) 14238 MB ( 8247, 19836) 60 242.72 MB/s 16367 MB ( 8652, 21217) 18909 MB ( 11514, 23561) 80 212.94 MB/s 19424 MB ( 5632, 24047) 21937 MB ( 8567, 26469) 100 161.66 MB/s 26006 MB ( 26004, 26007) 28445 MB ( 28407, 28471)
Except for the swappiness = 20 case, things are a smallish bit better for the modified kernel than 2.6.9-rc1-mm3. Clearly we haven't found the root of this problem yet.
Have you still been unable to duplicate this problem on a small i386 platform? -- Best Regards, Ray ----------------------------------------------- Ray Bryant 512-453-9679 (work) 512-507-7807 (cell) raybry@sgi.com raybry@austin.rr.com The box said: "Requires Windows 98 or better", so I installed Linux. -----------------------------------------------
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