== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:21:07 (1746066067)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 4.11594 s, 25.5 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff8800b6746800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.932738
Iter 1/10: OSS cache speed: 0.872689
Iter 1/10: ladvise speed: 0.88855
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.01999
Iter 2/10: OSS cache speed: 0.888688
Iter 2/10: ladvise speed: 0.821859
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.757128
Iter 3/10: OSS cache speed: 0.731488
Iter 3/10: ladvise speed: 0.772227
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.783718
Iter 4/10: OSS cache speed: 0.808694
Iter 4/10: ladvise speed: 0.832994
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.797212
Iter 5/10: OSS cache speed: 0.845292
Iter 5/10: ladvise speed: 0.977675
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.895042
Iter 6/10: OSS cache speed: 0.887271
Iter 6/10: ladvise speed: 0.899739
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.932252
Iter 7/10: OSS cache speed: 0.937573
Iter 7/10: ladvise speed: 0.952419
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.994764
Iter 8/10: OSS cache speed: 0.944346
Iter 8/10: ladvise speed: 1.06302
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.20171
Iter 9/10: OSS cache speed: 1.00101
Iter 9/10: ladvise speed: 0.921223
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.01131
Iter 10/10: OSS cache speed: 0.941921
Iter 10/10: ladvise speed: 1.01195
Average uncached read: .93
Average speedup with OSS cached read:  .88 = +-5%
Average speedup with ladvise willread:  .91 = +-2%
Speedup with OSS cached read less than 20%,  got -5%. Skipping ladvise willread check.
fail_loc=0