== sanity test 255a: check 'lfs ladvise -a willread' ===== 02:14:34 (1761286474)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.10153 s, 11.5 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-ffff95d684a37800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.439642
Iter 1/10: OSS cache speed: 0.528647
Iter 1/10: ladvise speed: 0.468119
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.432235
Iter 2/10: OSS cache speed: 0.494099
Iter 2/10: ladvise speed: 0.521854
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.425977
Iter 3/10: OSS cache speed: 0.459263
Iter 3/10: ladvise speed: 0.508122
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.494476
Iter 4/10: OSS cache speed: 0.542777
Iter 4/10: ladvise speed: 0.389002
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.36973
Iter 5/10: OSS cache speed: 0.471605
Iter 5/10: ladvise speed: 0.488952
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.401161
Iter 6/10: OSS cache speed: 0.418524
Iter 6/10: ladvise speed: 0.36778
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.378502
Iter 7/10: OSS cache speed: 0.45155
Iter 7/10: ladvise speed: 0.401692
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.406394
Iter 8/10: OSS cache speed: 0.568736
Iter 8/10: ladvise speed: 0.567151
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.544021
Iter 9/10: OSS cache speed: 0.692365
Iter 9/10: ladvise speed: 0.658761
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.290618
Iter 10/10: OSS cache speed: 0.441535
Iter 10/10: ladvise speed: 0.466863
Average uncached read: .41
Average speedup with OSS cached read:  .50 = +21%
Average speedup with ladvise willread:  .48 = +17%
fail_loc=0