== sanity test 255a: check 'lfs ladvise -a willread' ===== 14:38:34 (1784227114)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.97691 s, 17.5 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-ffff88955145d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.796418
Iter 1/10: OSS cache speed: 1.10941
Iter 1/10: ladvise speed: 1.11148
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.20974
Iter 2/10: OSS cache speed: 1.35286
Iter 2/10: ladvise speed: 1.07289
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.50324
Iter 3/10: OSS cache speed: 1.74688
Iter 3/10: ladvise speed: 1.63103
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.44365
Iter 4/10: OSS cache speed: 1.09727
Iter 4/10: ladvise speed: 0.587166
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.526207
Iter 5/10: OSS cache speed: 0.576746
Iter 5/10: ladvise speed: 0.55883
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.57027
Iter 6/10: OSS cache speed: 0.571985
Iter 6/10: ladvise speed: 0.554834
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.548196
Iter 7/10: OSS cache speed: 0.56316
Iter 7/10: ladvise speed: 0.683777
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.69962
Iter 8/10: OSS cache speed: 0.705731
Iter 8/10: ladvise speed: 0.88261
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.778509
Iter 9/10: OSS cache speed: 0.946167
Iter 9/10: ladvise speed: 0.852719
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.04269
Iter 10/10: OSS cache speed: 0.869746
Iter 10/10: ladvise speed: 0.836689
Average uncached read: .91
Average speedup with OSS cached read:  .95 = +4%
Average speedup with ladvise willread:  .87 = +-4%
Speedup with OSS cached read less than 20%,  got 4%. Skipping ladvise willread check.
fail_loc=0