== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:12:45 (1783645965)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.05974 s, 17.3 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-ffff9cbf49cd0000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.88885
Iter 1/10: OSS cache speed: 2.12585
Iter 1/10: ladvise speed: 0.405589
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.24728
Iter 2/10: OSS cache speed: 0.469128
Iter 2/10: ladvise speed: 0.420232
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.364028
Iter 3/10: OSS cache speed: 0.390091
Iter 3/10: ladvise speed: 0.442729
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.29334
Iter 4/10: OSS cache speed: 0.269986
Iter 4/10: ladvise speed: 0.406946
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.495525
Iter 5/10: OSS cache speed: 0.536951
Iter 5/10: ladvise speed: 0.571619
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.531327
Iter 6/10: OSS cache speed: 0.59129
Iter 6/10: ladvise speed: 0.719684
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.739109
Iter 7/10: OSS cache speed: 0.811026
Iter 7/10: ladvise speed: 1.17457
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.05082
Iter 8/10: OSS cache speed: 2.41785
Iter 8/10: ladvise speed: 2.53151
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.61592
Iter 9/10: OSS cache speed: 1.78548
Iter 9/10: ladvise speed: 1.35175
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.11205
Iter 10/10: OSS cache speed: 1.21046
Iter 10/10: ladvise speed: 1.248
Average uncached read: .93
Average speedup with OSS cached read:  1.06 = +13%
Average speedup with ladvise willread:  .92 = +-1%
Speedup with OSS cached read less than 20%,  got 13%. Skipping ladvise willread check.
fail_loc=0