== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:00:02 (1788843602)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.0627 s, 7.5 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-ffff9f7244fdc800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.336759
Iter 1/10: OSS cache speed: 0.383817
Iter 1/10: ladvise speed: 0.391179
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.388466
Iter 2/10: OSS cache speed: 0.401529
Iter 2/10: ladvise speed: 0.366575
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.373264
Iter 3/10: OSS cache speed: 0.458693
Iter 3/10: ladvise speed: 0.491985
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.355299
Iter 4/10: OSS cache speed: 0.463852
Iter 4/10: ladvise speed: 0.461003
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.371528
Iter 5/10: OSS cache speed: 0.421773
Iter 5/10: ladvise speed: 0.343489
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.404153
Iter 6/10: OSS cache speed: 0.392463
Iter 6/10: ladvise speed: 0.403764
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.290543
Iter 7/10: OSS cache speed: 0.393983
Iter 7/10: ladvise speed: 0.350642
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.366893
Iter 8/10: OSS cache speed: 0.450168
Iter 8/10: ladvise speed: 0.339454
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.345756
Iter 9/10: OSS cache speed: 0.39295
Iter 9/10: ladvise speed: 0.40805
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.343262
Iter 10/10: OSS cache speed: 0.446898
Iter 10/10: ladvise speed: 0.430092
Average uncached read: .35
Average speedup with OSS cached read:  .42 = +20%
Average speedup with ladvise willread:  .39 = +11%
fail_loc=0