== sanity test 255a: check 'lfs ladvise -a willread' ===== 15:59:43 (1788465583)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.4923 s, 7.2 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-ffff908787d82000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.386119
Iter 1/10: OSS cache speed: 0.45159
Iter 1/10: ladvise speed: 0.355836
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.313725
Iter 2/10: OSS cache speed: 0.364116
Iter 2/10: ladvise speed: 0.288256
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.328503
Iter 3/10: OSS cache speed: 0.317369
Iter 3/10: ladvise speed: 0.356088
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.273883
Iter 4/10: OSS cache speed: 0.36633
Iter 4/10: ladvise speed: 0.357569
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.340209
Iter 5/10: OSS cache speed: 0.37561
Iter 5/10: ladvise speed: 0.42998
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.336899
Iter 6/10: OSS cache speed: 0.339925
Iter 6/10: ladvise speed: 0.36516
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.365009
Iter 7/10: OSS cache speed: 0.421873
Iter 7/10: ladvise speed: 0.443282
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.355227
Iter 8/10: OSS cache speed: 0.419581
Iter 8/10: ladvise speed: 0.448224
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.40913
Iter 9/10: OSS cache speed: 0.479971
Iter 9/10: ladvise speed: 0.470359
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.379551
Iter 10/10: OSS cache speed: 0.437034
Iter 10/10: ladvise speed: 0.507859
Average uncached read: .34
Average speedup with OSS cached read:  .39 = +14%
Average speedup with ladvise willread:  .40 = +17%
Speedup with OSS cached read less than 20%,  got 14%. Skipping ladvise willread check.
fail_loc=0