== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:51:10 (1781218270)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.94912 s, 15.1 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-ffff89b04a303800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.645262
Iter 1/10: OSS cache speed: 0.729283
Iter 1/10: ladvise speed: 0.724004
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.757907
Iter 2/10: OSS cache speed: 0.678681
Iter 2/10: ladvise speed: 0.747443
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.811885
Iter 3/10: OSS cache speed: 0.8313
Iter 3/10: ladvise speed: 0.872273
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.818194
Iter 4/10: OSS cache speed: 0.802611
Iter 4/10: ladvise speed: 0.833295
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.871412
Iter 5/10: OSS cache speed: 0.890961
Iter 5/10: ladvise speed: 0.674539
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.875366
Iter 6/10: OSS cache speed: 0.802725
Iter 6/10: ladvise speed: 0.797931
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.724271
Iter 7/10: OSS cache speed: 0.81045
Iter 7/10: ladvise speed: 0.803859
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.824238
Iter 8/10: OSS cache speed: 0.974382
Iter 8/10: ladvise speed: 0.956655
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.910981
Iter 9/10: OSS cache speed: 0.842976
Iter 9/10: ladvise speed: 0.904008
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.815913
Iter 10/10: OSS cache speed: 0.961403
Iter 10/10: ladvise speed: 0.84286
Average uncached read: .80
Average speedup with OSS cached read:  .83 = +3%
Average speedup with ladvise willread:  .81 = +1%
Speedup with OSS cached read less than 20%,  got 3%. Skipping ladvise willread check.
fail_loc=0