== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:49:18 (1789483758)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.8495 s, 8.2 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-ffff9545984b3800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.409775
Iter 1/10: OSS cache speed: 0.488971
Iter 1/10: ladvise speed: 0.47912
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.492881
Iter 2/10: OSS cache speed: 0.577331
Iter 2/10: ladvise speed: 0.43946
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.431641
Iter 3/10: OSS cache speed: 0.528123
Iter 3/10: ladvise speed: 0.498899
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.496586
Iter 4/10: OSS cache speed: 0.440976
Iter 4/10: ladvise speed: 0.507039
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.500199
Iter 5/10: OSS cache speed: 0.39461
Iter 5/10: ladvise speed: 0.43517
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.443483
Iter 6/10: OSS cache speed: 0.423867
Iter 6/10: ladvise speed: 0.455221
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.446075
Iter 7/10: OSS cache speed: 0.439484
Iter 7/10: ladvise speed: 0.260085
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.453404
Iter 8/10: OSS cache speed: 0.55155
Iter 8/10: ladvise speed: 0.461863
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.370719
Iter 9/10: OSS cache speed: 0.409616
Iter 9/10: ladvise speed: 0.417439
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.43388
Iter 10/10: OSS cache speed: 0.469959
Iter 10/10: ladvise speed: 0.526334
Average uncached read: .44
Average speedup with OSS cached read:  .47 = +6%
Average speedup with ladvise willread:  .44 = +0%
Speedup with OSS cached read less than 20%,  got 6%. Skipping ladvise willread check.
fail_loc=0