== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:27:08 (1789781228)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1212 s, 8.0 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-ffff9dfb5869d800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.351089
Iter 1/10: OSS cache speed: 0.300049
Iter 1/10: ladvise speed: 0.347049
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.338103
Iter 2/10: OSS cache speed: 0.352637
Iter 2/10: ladvise speed: 0.381161
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.344506
Iter 3/10: OSS cache speed: 0.426578
Iter 3/10: ladvise speed: 0.371662
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.406622
Iter 4/10: OSS cache speed: 0.430207
Iter 4/10: ladvise speed: 0.322909
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.358367
Iter 5/10: OSS cache speed: 0.326347
Iter 5/10: ladvise speed: 0.351059
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.383817
Iter 6/10: OSS cache speed: 0.451768
Iter 6/10: ladvise speed: 0.323863
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.30544
Iter 7/10: OSS cache speed: 0.293638
Iter 7/10: ladvise speed: 0.350971
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.433003
Iter 8/10: OSS cache speed: 0.380978
Iter 8/10: ladvise speed: 0.412868
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.349597
Iter 9/10: OSS cache speed: 0.281255
Iter 9/10: ladvise speed: 0.332658
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.327021
Iter 10/10: OSS cache speed: 0.376726
Iter 10/10: ladvise speed: 0.370247
Average uncached read: .35
Average speedup with OSS cached read:  .36 = +2%
Average speedup with ladvise willread:  .35 = +0%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0