== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:40:30 (1763343630)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.51045 s, 12.3 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-ffff916ec6210000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.395015
Iter 1/10: OSS cache speed: 0.366941
Iter 1/10: ladvise speed: 0.432158
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.459878
Iter 2/10: OSS cache speed: 0.428566
Iter 2/10: ladvise speed: 0.307458
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.392374
Iter 3/10: OSS cache speed: 0.421046
Iter 3/10: ladvise speed: 0.332303
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.402247
Iter 4/10: OSS cache speed: 0.43955
Iter 4/10: ladvise speed: 0.379515
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.432485
Iter 5/10: OSS cache speed: 0.424523
Iter 5/10: ladvise speed: 0.370865
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.403257
Iter 6/10: OSS cache speed: 0.372366
Iter 6/10: ladvise speed: 0.369779
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.42633
Iter 7/10: OSS cache speed: 0.336356
Iter 7/10: ladvise speed: 0.405771
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.422101
Iter 8/10: OSS cache speed: 0.419218
Iter 8/10: ladvise speed: 0.434354
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.405313
Iter 9/10: OSS cache speed: 0.423991
Iter 9/10: ladvise speed: 0.404511
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.388924
Iter 10/10: OSS cache speed: 0.351465
Iter 10/10: ladvise speed: 0.383729
Average uncached read: .41
Average speedup with OSS cached read:  .39 = +-4%
Average speedup with ladvise willread:  .38 = +-7%
Speedup with OSS cached read less than 20%,  got -4%. Skipping ladvise willread check.
fail_loc=0