== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:59:55 (1786103995)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 24.3294 s, 4.3 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-ffff97ce88f7c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.385603
Iter 1/10: OSS cache speed: 0.37154
Iter 1/10: ladvise speed: 0.390632
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.35256
Iter 2/10: OSS cache speed: 0.367955
Iter 2/10: ladvise speed: 0.429915
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.409831
Iter 3/10: OSS cache speed: 0.394275
Iter 3/10: ladvise speed: 0.46195
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.401598
Iter 4/10: OSS cache speed: 0.414412
Iter 4/10: ladvise speed: 0.385793
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.359626
Iter 5/10: OSS cache speed: 0.444628
Iter 5/10: ladvise speed: 0.388863
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.346117
Iter 6/10: OSS cache speed: 0.339281
Iter 6/10: ladvise speed: 0.385883
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.354985
Iter 7/10: OSS cache speed: 0.38571
Iter 7/10: ladvise speed: 0.383936
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.287986
Iter 8/10: OSS cache speed: 0.390199
Iter 8/10: ladvise speed: 0.379903
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.367441
Iter 9/10: OSS cache speed: 0.421292
Iter 9/10: ladvise speed: 0.310769
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.348213
Iter 10/10: OSS cache speed: 0.366884
Iter 10/10: ladvise speed: 0.387739
Average uncached read: .36
Average speedup with OSS cached read:  .38 = +5%
Average speedup with ladvise willread:  .39 = +8%
Speedup with OSS cached read less than 20%,  got 5%. Skipping ladvise willread check.
fail_loc=0