Re: [3/3] wake-one PG_locked/BH_Lock semantics

From: Michael J. Cohen
Date: Wed May 05 2004 - 04:31:45 EST

here's the tiobenches, run several times. there was no significant
deviation for -mm1 so it's not considered a problem.
No size specified, using 1022 MB

Unit information
================
File size = megabytes
Blk Size = bytes
Rate = megabytes per second
CPU% = percentage of CPU used during the test
Latency = milliseconds
Lat% = percent of requests that took longer than X seconds
CPU Eff = Rate divided by CPU% - throughput per cpu load

Sequential Reads
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 27.59 8.909% 0.138 313.59 0.00000 0.00000 310
2.6.6-rc3-mm1 1022 4096 2 26.30 8.676% 0.293 392.22 0.00000 0.00000 303
2.6.6-rc3-mm1 1022 4096 4 24.55 8.094% 0.625 525.17 0.00000 0.00000 303
2.6.6-rc3-mm1 1022 4096 8 24.34 7.966% 1.224 1035.81 0.00000 0.00000 306

Random Reads
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 0.52 0.429% 7.444 51.22 0.00000 0.00000 122
2.6.6-rc3-mm1 1022 4096 2 0.54 0.255% 14.238 212.31 0.00000 0.00000 211
2.6.6-rc3-mm1 1022 4096 4 0.59 0.332% 25.666 234.95 0.00000 0.00000 178
2.6.6-rc3-mm1 1022 4096 8 0.60 0.334% 45.477 413.88 0.00000 0.00000 180

Sequential Writes
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 24.51 18.11% 0.146 8561.11 0.00038 0.00000 135
2.6.6-rc3-mm1 1022 4096 2 26.12 19.45% 0.253 5324.12 0.00038 0.00000 134
2.6.6-rc3-mm1 1022 4096 4 20.58 15.03% 0.613 10596.65 0.00153 0.00077 137
2.6.6-rc3-mm1 1022 4096 8 20.87 15.14% 1.143 10301.78 0.02345 0.00077 138

Random Writes
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 0.90 0.473% 0.013 0.37 0.00000 0.00000 191
2.6.6-rc3-mm1 1022 4096 2 0.85 0.418% 0.093 175.91 0.00000 0.00000 203
2.6.6-rc3-mm1 1022 4096 4 0.84 0.444% 0.020 25.46 0.00000 0.00000 188
2.6.6-rc3-mm1 1022 4096 8 0.81 0.444% 0.013 0.37 0.00000 0.00000 182
No size specified, using 1022 MB

Unit information
================
File size = megabytes
Blk Size = bytes
Rate = megabytes per second
CPU% = percentage of CPU used during the test
Latency = milliseconds
Lat% = percent of requests that took longer than X seconds
CPU Eff = Rate divided by CPU% - throughput per cpu load

Sequential Reads
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 25.94 11.71% 0.146 370.36 0.00000 0.00000 221
2.6.6-rc3-mm1 1022 4096 2 24.96 11.34% 0.304 507.07 0.00000 0.00000 220
2.6.6-rc3-mm1 1022 4096 4 24.35 10.74% 0.626 776.48 0.00000 0.00000 227
2.6.6-rc3-mm1 1022 4096 8 24.50 10.80% 1.225 1037.49 0.00000 0.00000 227

Random Reads
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 0.58 0.579% 6.761 108.38 0.00000 0.00000 100
2.6.6-rc3-mm1 1022 4096 2 0.66 0.446% 11.394 134.13 0.00000 0.00000 147
2.6.6-rc3-mm1 1022 4096 4 0.64 0.414% 23.910 267.87 0.00000 0.00000 155
2.6.6-rc3-mm1 1022 4096 8 0.74 0.500% 39.739 379.63 0.00000 0.00000 147

Sequential Writes
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 25.92 28.26% 0.119 789.56 0.00000 0.00000 92
2.6.6-rc3-mm1 1022 4096 2 25.08 24.29% 0.236 7824.13 0.00076 0.00000 103
2.6.6-rc3-mm1 1022 4096 4 23.12 24.59% 0.532 8510.70 0.00038 0.00000 94
2.6.6-rc3-mm1 1022 4096 8 22.88 21.04% 1.018 7272.02 0.01922 0.00000 109

Random Writes
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 0.87 0.620% 0.023 19.71 0.00000 0.00000 140
2.6.6-rc3-mm1 1022 4096 2 0.87 0.632% 0.048 118.52 0.00000 0.00000 137
2.6.6-rc3-mm1 1022 4096 4 0.84 0.557% 0.020 11.00 0.00000 0.00000 150
2.6.6-rc3-mm1 1022 4096 8 0.81 0.626% 0.018 0.45 0.00000 0.00000 129
No size specified, using 1022 MB

Unit information
================
File size = megabytes
Blk Size = bytes
Rate = megabytes per second
CPU% = percentage of CPU used during the test
Latency = milliseconds
Lat% = percent of requests that took longer than X seconds
CPU Eff = Rate divided by CPU% - throughput per cpu load

Sequential Reads
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 27.70 8.979% 0.138 337.13 0.00000 0.00000 309
2.6.6-rc3-mm1 1022 4096 2 26.03 8.543% 0.295 271.51 0.00000 0.00000 305
2.6.6-rc3-mm1 1022 4096 4 23.63 7.704% 0.643 533.84 0.00000 0.00000 307
2.6.6-rc3-mm1 1022 4096 8 22.98 7.555% 1.295 1157.90 0.00000 0.00000 304

Random Reads
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 0.48 0.359% 8.204 58.92 0.00000 0.00000 132
2.6.6-rc3-mm1 1022 4096 2 0.51 0.259% 14.726 208.67 0.00000 0.00000 198
2.6.6-rc3-mm1 1022 4096 4 0.52 0.303% 29.583 256.53 0.00000 0.00000 172
2.6.6-rc3-mm1 1022 4096 8 0.59 0.283% 49.995 347.57 0.00000 0.00000 208

Sequential Writes
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 23.53 36.09% 0.135 8438.51 0.00038 0.00000 65
2.6.6-rc3-mm1 1022 4096 2 26.13 19.06% 0.235 1934.21 0.00000 0.00000 137
2.6.6-rc3-mm1 1022 4096 4 23.62 17.09% 0.539 9043.92 0.00115 0.00000 138
2.6.6-rc3-mm1 1022 4096 8 24.08 17.34% 0.985 7376.00 0.01499 0.00000 139

Random Writes
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 0.90 0.465% 0.014 0.26 0.00000 0.00000 193
2.6.6-rc3-mm1 1022 4096 2 0.87 0.468% 0.014 0.32 0.00000 0.00000 186
2.6.6-rc3-mm1 1022 4096 4 0.84 0.438% 0.013 0.09 0.00000 0.00000 191
2.6.6-rc3-mm1 1022 4096 8 0.84 0.460% 0.014 1.46 0.00000 0.00000 182
No size specified, using 1022 MB

Unit information
================
File size = megabytes
Blk Size = bytes
Rate = megabytes per second
CPU% = percentage of CPU used during the test
Latency = milliseconds
Lat% = percent of requests that took longer than X seconds
CPU Eff = Rate divided by CPU% - throughput per cpu load

Sequential Reads
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 27.00 8.584% 0.142 346.75 0.00000 0.00000 315
2.6.6-rc3-mm1 1022 4096 2 25.95 8.042% 0.295 413.18 0.00000 0.00000 323
2.6.6-rc3-mm1 1022 4096 4 23.97 7.407% 0.639 701.70 0.00000 0.00000 324
2.6.6-rc3-mm1 1022 4096 8 24.52 7.811% 1.218 1026.37 0.00000 0.00000 314

Random Reads
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 0.64 0.374% 6.134 132.43 0.00000 0.00000 170
2.6.6-rc3-mm1 1022 4096 2 0.67 0.262% 11.186 176.23 0.00000 0.00000 256
2.6.6-rc3-mm1 1022 4096 4 0.67 0.289% 20.849 343.38 0.00000 0.00000 230
2.6.6-rc3-mm1 1022 4096 8 0.67 0.264% 45.265 396.09 0.00000 0.00000 252

Sequential Writes
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 24.72 18.37% 0.149 9206.91 0.00038 0.00000 135
2.6.6-rc3-mm1 1022 4096 2 24.82 18.16% 0.234 2451.44 0.00038 0.00000 137
2.6.6-rc3-mm1 1022 4096 4 23.66 17.31% 0.586 8381.46 0.00153 0.00000 137
2.6.6-rc3-mm1 1022 4096 8 23.45 16.87% 0.942 7985.45 0.01423 0.00000 139

Random Writes
File Blk Num Avg Maximum Lat% Lat% CPU
Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff
---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- -----
2.6.6-rc3-mm1 1022 4096 1 0.91 0.470% 0.013 0.27 0.00000 0.00000 193
2.6.6-rc3-mm1 1022 4096 2 0.83 0.402% 0.013 0.27 0.00000 0.00000 206
2.6.6-rc3-mm1 1022 4096 4 0.85 0.417% 0.013 0.29 0.00000 0.00000 203
2.6.6-rc3-mm1 1022 4096 8 0.81 0.388% 0.013 0.27 0.00000 0.00000 208