== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:49:28 (1788763768)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.25758 s, 16.8 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-ffff8e4ea1bd5800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.03786
Iter 1/10: OSS cache speed: 0.868584
Iter 1/10: ladvise speed: 0.794627
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.854754
Iter 2/10: OSS cache speed: 0.991596
Iter 2/10: ladvise speed: 0.789036
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.898094
Iter 3/10: OSS cache speed: 0.922181
Iter 3/10: ladvise speed: 0.731623
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.813308
Iter 4/10: OSS cache speed: 0.792793
Iter 4/10: ladvise speed: 0.839844
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.904
Iter 5/10: OSS cache speed: 1.03432
Iter 5/10: ladvise speed: 0.837704
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.839197
Iter 6/10: OSS cache speed: 0.801343
Iter 6/10: ladvise speed: 0.787679
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.825626
Iter 7/10: OSS cache speed: 1.05103
Iter 7/10: ladvise speed: 0.910138
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.806298
Iter 8/10: OSS cache speed: 0.898974
Iter 8/10: ladvise speed: 0.986516
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.966679
Iter 9/10: OSS cache speed: 1.01735
Iter 9/10: ladvise speed: 0.991073
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.14423
Iter 10/10: OSS cache speed: 1.16453
Iter 10/10: ladvise speed: 1.00588
Average uncached read: .90
Average speedup with OSS cached read:  .95 = +5%
Average speedup with ladvise willread:  .86 = +-4%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0