== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:38:20 (1788622700)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1711 s, 8.0 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-ffff944c59b79800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.309728
Iter 1/10: OSS cache speed: 0.344701
Iter 1/10: ladvise speed: 0.334591
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.315038
Iter 2/10: OSS cache speed: 0.442723
Iter 2/10: ladvise speed: 0.388887
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.354054
Iter 3/10: OSS cache speed: 0.371659
Iter 3/10: ladvise speed: 0.283118
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.340331
Iter 4/10: OSS cache speed: 0.377564
Iter 4/10: ladvise speed: 0.347624
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.368063
Iter 5/10: OSS cache speed: 0.355216
Iter 5/10: ladvise speed: 0.34159
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.282971
Iter 6/10: OSS cache speed: 0.35766
Iter 6/10: ladvise speed: 0.314028
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.31146
Iter 7/10: OSS cache speed: 0.327436
Iter 7/10: ladvise speed: 0.440585
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.338084
Iter 8/10: OSS cache speed: 0.340835
Iter 8/10: ladvise speed: 0.358112
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.357705
Iter 9/10: OSS cache speed: 0.435394
Iter 9/10: ladvise speed: 0.403515
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.342162
Iter 10/10: OSS cache speed: 0.347718
Iter 10/10: ladvise speed: 0.365194
Average uncached read: .33
Average speedup with OSS cached read:  .37 = +12%
Average speedup with ladvise willread:  .35 = +6%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0