== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:37:48 (1786754268)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.2005 s, 7.4 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-ffff93b5491b0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.282442
Iter 1/10: OSS cache speed: 0.364283
Iter 1/10: ladvise speed: 0.280427
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.305946
Iter 2/10: OSS cache speed: 0.333302
Iter 2/10: ladvise speed: 0.305308
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.29944
Iter 3/10: OSS cache speed: 0.270204
Iter 3/10: ladvise speed: 0.292957
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.297642
Iter 4/10: OSS cache speed: 0.280744
Iter 4/10: ladvise speed: 0.307528
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.294897
Iter 5/10: OSS cache speed: 0.349098
Iter 5/10: ladvise speed: 0.331897
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.31475
Iter 6/10: OSS cache speed: 0.35421
Iter 6/10: ladvise speed: 0.33855
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.301717
Iter 7/10: OSS cache speed: 0.319746
Iter 7/10: ladvise speed: 0.346738
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.317413
Iter 8/10: OSS cache speed: 0.302944
Iter 8/10: ladvise speed: 0.319888
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.340995
Iter 9/10: OSS cache speed: 0.298139
Iter 9/10: ladvise speed: 0.321412
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.318758
Iter 10/10: OSS cache speed: 0.284633
Iter 10/10: ladvise speed: 0.34121
Average uncached read: .30
Average speedup with OSS cached read:  .31 = +3%
Average speedup with ladvise willread:  .31 = +3%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0