== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:40:29 (1788910829)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.19763 s, 12.8 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-ffff95bf0a40f800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.623415
Iter 1/10: OSS cache speed: 0.624042
Iter 1/10: ladvise speed: 0.757159
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.816055
Iter 2/10: OSS cache speed: 0.840455
Iter 2/10: ladvise speed: 0.993315
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.20815
Iter 3/10: OSS cache speed: 1.19343
Iter 3/10: ladvise speed: 1.21334
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.2339
Iter 4/10: OSS cache speed: 1.17144
Iter 4/10: ladvise speed: 1.2932
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.07263
Iter 5/10: OSS cache speed: 1.04313
Iter 5/10: ladvise speed: 1.19989
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.29983
Iter 6/10: OSS cache speed: 1.59266
Iter 6/10: ladvise speed: 1.91048
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.96408
Iter 7/10: OSS cache speed: 1.97514
Iter 7/10: ladvise speed: 2.22521
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.97461
Iter 8/10: OSS cache speed: 2.02282
Iter 8/10: ladvise speed: 2.15002
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.11091
Iter 9/10: OSS cache speed: 2.14631
Iter 9/10: ladvise speed: 2.02814
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.83658
Iter 10/10: OSS cache speed: 2.01637
Iter 10/10: ladvise speed: 0.623335
Average uncached read: 1.41
Average speedup with OSS cached read:  1.46 = +3%
Average speedup with ladvise willread:  1.43 = +1%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0