== sanity test 255a: check 'lfs ladvise -a willread' ===== 18:35:43 (1746138943)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 7.69189 s, 13.6 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-ffff8800ae8fc800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.595081
Iter 1/10: OSS cache speed: 0.594623
Iter 1/10: ladvise speed: 0.590455
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.544297
Iter 2/10: OSS cache speed: 0.648708
Iter 2/10: ladvise speed: 0.668878
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.569964
Iter 3/10: OSS cache speed: 0.637651
Iter 3/10: ladvise speed: 0.599498
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.555264
Iter 4/10: OSS cache speed: 0.621371
Iter 4/10: ladvise speed: 0.63127
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.579076
Iter 5/10: OSS cache speed: 0.644564
Iter 5/10: ladvise speed: 0.637299
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.543733
Iter 6/10: OSS cache speed: 0.602678
Iter 6/10: ladvise speed: 0.660704
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.590121
Iter 7/10: OSS cache speed: 0.583955
Iter 7/10: ladvise speed: 0.660269
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.610064
Iter 8/10: OSS cache speed: 0.6383
Iter 8/10: ladvise speed: 0.646639
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.557947
Iter 9/10: OSS cache speed: 0.657383
Iter 9/10: ladvise speed: 0.652005
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.562134
Iter 10/10: OSS cache speed: 0.660768
Iter 10/10: ladvise speed: 0.747657
Average uncached read: .57
Average speedup with OSS cached read:  .62 = +8%
Average speedup with ladvise willread:  .64 = +12%
Speedup with OSS cached read less than 20%,  got 8%. Skipping ladvise willread check.
fail_loc=0