== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:51:39 (1787572299)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.9339 s, 7.5 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-ffff9bc6202c0800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.330219
Iter 1/10: OSS cache speed: 0.356633
Iter 1/10: ladvise speed: 0.356375
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.318236
Iter 2/10: OSS cache speed: 0.33444
Iter 2/10: ladvise speed: 0.38486
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.33199
Iter 3/10: OSS cache speed: 0.358775
Iter 3/10: ladvise speed: 0.325443
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.32684
Iter 4/10: OSS cache speed: 0.407152
Iter 4/10: ladvise speed: 0.377853
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.381345
Iter 5/10: OSS cache speed: 0.377997
Iter 5/10: ladvise speed: 0.399283
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.271301
Iter 6/10: OSS cache speed: 0.355906
Iter 6/10: ladvise speed: 0.364154
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.32106
Iter 7/10: OSS cache speed: 0.367161
Iter 7/10: ladvise speed: 0.376732
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.277786
Iter 8/10: OSS cache speed: 0.360609
Iter 8/10: ladvise speed: 0.388219
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.365876
Iter 9/10: OSS cache speed: 0.390362
Iter 9/10: ladvise speed: 0.318518
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.3134
Iter 10/10: OSS cache speed: 0.302556
Iter 10/10: ladvise speed: 0.389115
Average uncached read: .32
Average speedup with OSS cached read:  .36 = +12%
Average speedup with ladvise willread:  .36 = +12%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0