== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:58:10 (1787745490)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 14.7722 s, 7.1 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-ffff8bdb0a606800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.312522
Iter 1/10: OSS cache speed: 0.322943
Iter 1/10: ladvise speed: 0.363905
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.350017
Iter 2/10: OSS cache speed: 0.398613
Iter 2/10: ladvise speed: 0.38914
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.340926
Iter 3/10: OSS cache speed: 0.399963
Iter 3/10: ladvise speed: 0.347012
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.36287
Iter 4/10: OSS cache speed: 0.352794
Iter 4/10: ladvise speed: 0.318189
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.282773
Iter 5/10: OSS cache speed: 0.333612
Iter 5/10: ladvise speed: 0.375605
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.32196
Iter 6/10: OSS cache speed: 0.360758
Iter 6/10: ladvise speed: 0.353799
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.37552
Iter 7/10: OSS cache speed: 0.354427
Iter 7/10: ladvise speed: 0.380031
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.319197
Iter 8/10: OSS cache speed: 0.316953
Iter 8/10: ladvise speed: 0.332012
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.300333
Iter 9/10: OSS cache speed: 0.327275
Iter 9/10: ladvise speed: 0.399978
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.320165
Iter 10/10: OSS cache speed: 0.404561
Iter 10/10: ladvise speed: 0.372279
Average uncached read: .32
Average speedup with OSS cached read:  .35 = +9%
Average speedup with ladvise willread:  .36 = +12%
Speedup with OSS cached read less than 20%,  got 9%. Skipping ladvise willread check.
fail_loc=0