== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:08:49 (1788192529)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.1387 s, 9.4 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-ffff909502bd1000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.34893
Iter 1/10: OSS cache speed: 0.402099
Iter 1/10: ladvise speed: 0.398609
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.431904
Iter 2/10: OSS cache speed: 0.488137
Iter 2/10: ladvise speed: 0.441526
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.307174
Iter 3/10: OSS cache speed: 0.452968
Iter 3/10: ladvise speed: 0.392261
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.431153
Iter 4/10: OSS cache speed: 0.34921
Iter 4/10: ladvise speed: 0.440916
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.380894
Iter 5/10: OSS cache speed: 0.408003
Iter 5/10: ladvise speed: 0.392943
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.410379
Iter 6/10: OSS cache speed: 0.388033
Iter 6/10: ladvise speed: 0.428368
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.444087
Iter 7/10: OSS cache speed: 0.358757
Iter 7/10: ladvise speed: 0.40031
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.394062
Iter 8/10: OSS cache speed: 0.374595
Iter 8/10: ladvise speed: 0.39783
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.377779
Iter 9/10: OSS cache speed: 0.396714
Iter 9/10: ladvise speed: 0.381481
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.411609
Iter 10/10: OSS cache speed: 0.366733
Iter 10/10: ladvise speed: 0.437699
Average uncached read: .39
Average speedup with OSS cached read:  .39 = +0%
Average speedup with ladvise willread:  .41 = +5%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0