== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:17:12 (1786036632)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.7755 s, 7.6 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-ffff92dbc97a9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.377157
Iter 1/10: OSS cache speed: 0.457217
Iter 1/10: ladvise speed: 0.411125
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.362828
Iter 2/10: OSS cache speed: 0.377892
Iter 2/10: ladvise speed: 0.410714
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.46137
Iter 3/10: OSS cache speed: 0.396052
Iter 3/10: ladvise speed: 0.421967
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.343201
Iter 4/10: OSS cache speed: 0.345922
Iter 4/10: ladvise speed: 0.396439
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.380657
Iter 5/10: OSS cache speed: 0.469397
Iter 5/10: ladvise speed: 0.37166
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.251921
Iter 6/10: OSS cache speed: 0.406605
Iter 6/10: ladvise speed: 0.326403
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.494839
Iter 7/10: OSS cache speed: 0.33461
Iter 7/10: ladvise speed: 0.34581
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.316882
Iter 8/10: OSS cache speed: 0.344437
Iter 8/10: ladvise speed: 0.404618
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.354157
Iter 9/10: OSS cache speed: 0.32189
Iter 9/10: ladvise speed: 0.325838
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.303446
Iter 10/10: OSS cache speed: 0.365393
Iter 10/10: ladvise speed: 0.346456
Average uncached read: .36
Average speedup with OSS cached read:  .38 = +5%
Average speedup with ladvise willread:  .37 = +2%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0