== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:48:12 (1790675292)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.5829 s, 8.3 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-ffff994e84f6d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.43874
Iter 1/10: OSS cache speed: 0.403628
Iter 1/10: ladvise speed: 0.343301
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.330308
Iter 2/10: OSS cache speed: 0.451044
Iter 2/10: ladvise speed: 0.449406
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.353855
Iter 3/10: OSS cache speed: 0.364271
Iter 3/10: ladvise speed: 0.320849
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.36962
Iter 4/10: OSS cache speed: 0.345738
Iter 4/10: ladvise speed: 0.389288
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.387121
Iter 5/10: OSS cache speed: 0.352422
Iter 5/10: ladvise speed: 0.40997
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.498406
Iter 6/10: OSS cache speed: 0.419475
Iter 6/10: ladvise speed: 0.459174
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.493207
Iter 7/10: OSS cache speed: 0.497131
Iter 7/10: ladvise speed: 0.527578
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.474808
Iter 8/10: OSS cache speed: 0.45285
Iter 8/10: ladvise speed: 0.4553
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.49671
Iter 9/10: OSS cache speed: 0.494107
Iter 9/10: ladvise speed: 0.485816
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.49765
Iter 10/10: OSS cache speed: 0.410724
Iter 10/10: ladvise speed: 0.342844
Average uncached read: .43
Average speedup with OSS cached read:  .41 = +-4%
Average speedup with ladvise willread:  .41 = +-4%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0