== sanity test 255a: check 'lfs ladvise -a willread' ===== 19:56:45 (1788739005)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 31.6486 s, 3.3 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-ffff96b8c4fe9800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.513605
Iter 1/10: OSS cache speed: 0.496377
Iter 1/10: ladvise speed: 0.407726
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.371534
Iter 2/10: OSS cache speed: 0.530729
Iter 2/10: ladvise speed: 0.506427
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.301655
Iter 3/10: OSS cache speed: 0.37676
Iter 3/10: ladvise speed: 0.353002
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.288704
Iter 4/10: OSS cache speed: 0.389343
Iter 4/10: ladvise speed: 0.344965
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.43612
Iter 5/10: OSS cache speed: 0.525964
Iter 5/10: ladvise speed: 0.471075
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.539809
Iter 6/10: OSS cache speed: 0.555103
Iter 6/10: ladvise speed: 0.628884
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.531885
Iter 7/10: OSS cache speed: 0.64844
Iter 7/10: ladvise speed: 0.640395
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.494815
Iter 8/10: OSS cache speed: 0.615733
Iter 8/10: ladvise speed: 0.637783
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.587021
Iter 9/10: OSS cache speed: 0.517515
Iter 9/10: ladvise speed: 0.476629
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.461283
Iter 10/10: OSS cache speed: 0.362461
Iter 10/10: ladvise speed: 0.387956
Average uncached read: .45
Average speedup with OSS cached read:  .50 = +11%
Average speedup with ladvise willread:  .48 = +6%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0