== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:21:35 (1789060895)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.7192 s, 8.2 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-ffff945e83e9f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.353805
Iter 1/10: OSS cache speed: 0.4062
Iter 1/10: ladvise speed: 0.367144
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.352818
Iter 2/10: OSS cache speed: 0.389063
Iter 2/10: ladvise speed: 0.375529
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.330162
Iter 3/10: OSS cache speed: 0.384266
Iter 3/10: ladvise speed: 0.395635
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.34511
Iter 4/10: OSS cache speed: 0.314697
Iter 4/10: ladvise speed: 0.384636
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.351368
Iter 5/10: OSS cache speed: 0.397392
Iter 5/10: ladvise speed: 0.450906
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.372906
Iter 6/10: OSS cache speed: 0.357468
Iter 6/10: ladvise speed: 0.344837
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.318541
Iter 7/10: OSS cache speed: 0.36598
Iter 7/10: ladvise speed: 0.295725
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.306737
Iter 8/10: OSS cache speed: 0.365273
Iter 8/10: ladvise speed: 0.334075
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.262489
Iter 9/10: OSS cache speed: 0.331882
Iter 9/10: ladvise speed: 0.333802
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.327665
Iter 10/10: OSS cache speed: 0.336885
Iter 10/10: ladvise speed: 0.297503
Average uncached read: .33
Average speedup with OSS cached read:  .36 = +9%
Average speedup with ladvise willread:  .35 = +6%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0