== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:38:32 (1761284312)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.53499 s, 13.9 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-ffff8f44e01c7000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.370649
Iter 1/10: OSS cache speed: 0.647022
Iter 1/10: ladvise speed: 0.600892
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.525522
Iter 2/10: OSS cache speed: 0.587607
Iter 2/10: ladvise speed: 0.628205
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.497094
Iter 3/10: OSS cache speed: 0.611597
Iter 3/10: ladvise speed: 0.586701
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.535513
Iter 4/10: OSS cache speed: 0.574395
Iter 4/10: ladvise speed: 0.575837
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.556971
Iter 5/10: OSS cache speed: 0.621802
Iter 5/10: ladvise speed: 0.570756
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.500942
Iter 6/10: OSS cache speed: 0.58508
Iter 6/10: ladvise speed: 0.644351
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.584766
Iter 7/10: OSS cache speed: 0.594909
Iter 7/10: ladvise speed: 0.570529
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.526746
Iter 8/10: OSS cache speed: 0.609774
Iter 8/10: ladvise speed: 0.570288
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.484551
Iter 9/10: OSS cache speed: 0.57662
Iter 9/10: ladvise speed: 0.60802
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.528168
Iter 10/10: OSS cache speed: 0.540223
Iter 10/10: ladvise speed: 0.515739
Average uncached read: .51
Average speedup with OSS cached read:  .59 = +15%
Average speedup with ladvise willread:  .58 = +13%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0