== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:22:27 (1788362547)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.94977 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-ffff98d849e21800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.79087
Iter 1/10: OSS cache speed: 2.16201
Iter 1/10: ladvise speed: 0.505348
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.573315
Iter 2/10: OSS cache speed: 0.696207
Iter 2/10: ladvise speed: 0.631317
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.502627
Iter 3/10: OSS cache speed: 0.56009
Iter 3/10: ladvise speed: 0.519787
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.481696
Iter 4/10: OSS cache speed: 0.559255
Iter 4/10: ladvise speed: 0.622511
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.557745
Iter 5/10: OSS cache speed: 0.62221
Iter 5/10: ladvise speed: 0.631508
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.601138
Iter 6/10: OSS cache speed: 0.784751
Iter 6/10: ladvise speed: 0.834845
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.78532
Iter 7/10: OSS cache speed: 0.955727
Iter 7/10: ladvise speed: 0.966312
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.772317
Iter 8/10: OSS cache speed: 1.11979
Iter 8/10: ladvise speed: 1.40317
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.70998
Iter 9/10: OSS cache speed: 1.71595
Iter 9/10: ladvise speed: 1.56809
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.36487
Iter 10/10: OSS cache speed: 1.66482
Iter 10/10: ladvise speed: 1.75069
Average uncached read: .91
Average speedup with OSS cached read:  1.08 = +18%
Average speedup with ladvise willread:  .94 = +3%
Speedup with OSS cached read less than 20%,  got 18%. Skipping ladvise willread check.
fail_loc=0