== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:12:24 (1787836344)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2869 s, 8.5 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-ffff89a2c5648000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.372273
Iter 1/10: OSS cache speed: 0.425486
Iter 1/10: ladvise speed: 0.405199
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.431886
Iter 2/10: OSS cache speed: 0.444588
Iter 2/10: ladvise speed: 0.481021
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.438476
Iter 3/10: OSS cache speed: 0.463116
Iter 3/10: ladvise speed: 0.465464
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.43118
Iter 4/10: OSS cache speed: 0.463871
Iter 4/10: ladvise speed: 0.350787
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.425629
Iter 5/10: OSS cache speed: 0.424717
Iter 5/10: ladvise speed: 0.401383
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.44459
Iter 6/10: OSS cache speed: 0.396103
Iter 6/10: ladvise speed: 0.473236
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.376806
Iter 7/10: OSS cache speed: 0.456673
Iter 7/10: ladvise speed: 0.460139
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.401779
Iter 8/10: OSS cache speed: 0.455546
Iter 8/10: ladvise speed: 0.457664
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.443894
Iter 9/10: OSS cache speed: 0.470834
Iter 9/10: ladvise speed: 0.43091
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.332869
Iter 10/10: OSS cache speed: 0.332238
Iter 10/10: ladvise speed: 0.440212
Average uncached read: .40
Average speedup with OSS cached read:  .43 = +7%
Average speedup with ladvise willread:  .43 = +7%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0