== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:15:46 (1781219746)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.97328 s, 17.6 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-ffff8e968886d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.832118
Iter 1/10: OSS cache speed: 0.980791
Iter 1/10: ladvise speed: 0.925071
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.897424
Iter 2/10: OSS cache speed: 0.809042
Iter 2/10: ladvise speed: 0.906157
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.843888
Iter 3/10: OSS cache speed: 0.975722
Iter 3/10: ladvise speed: 0.820037
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.871925
Iter 4/10: OSS cache speed: 0.811738
Iter 4/10: ladvise speed: 0.79197
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.783826
Iter 5/10: OSS cache speed: 0.581342
Iter 5/10: ladvise speed: 0.642238
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.676438
Iter 6/10: OSS cache speed: 0.717682
Iter 6/10: ladvise speed: 0.64651
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.678306
Iter 7/10: OSS cache speed: 0.753936
Iter 7/10: ladvise speed: 0.800931
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.787051
Iter 8/10: OSS cache speed: 0.793079
Iter 8/10: ladvise speed: 0.915762
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.921733
Iter 9/10: OSS cache speed: 0.801764
Iter 9/10: ladvise speed: 0.736444
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.869601
Iter 10/10: OSS cache speed: 0.745022
Iter 10/10: ladvise speed: 0.84474
Average uncached read: .81
Average speedup with OSS cached read:  .79 = +-2%
Average speedup with ladvise willread:  .80 = +-1%
Speedup with OSS cached read less than 20%,  got -2%. Skipping ladvise willread check.
fail_loc=0