== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:06:56 (1787144816)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.6912 s, 8.3 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-ffff99cb483eb000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.40246
Iter 1/10: OSS cache speed: 0.40909
Iter 1/10: ladvise speed: 0.372362
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.409088
Iter 2/10: OSS cache speed: 0.457423
Iter 2/10: ladvise speed: 0.446202
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.429114
Iter 3/10: OSS cache speed: 0.452927
Iter 3/10: ladvise speed: 0.493541
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.464388
Iter 4/10: OSS cache speed: 0.440159
Iter 4/10: ladvise speed: 0.443842
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.417426
Iter 5/10: OSS cache speed: 0.414247
Iter 5/10: ladvise speed: 0.453518
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.411871
Iter 6/10: OSS cache speed: 0.426546
Iter 6/10: ladvise speed: 0.40801
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.375304
Iter 7/10: OSS cache speed: 0.41625
Iter 7/10: ladvise speed: 0.463829
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.408446
Iter 8/10: OSS cache speed: 0.355506
Iter 8/10: ladvise speed: 0.44211
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.394866
Iter 9/10: OSS cache speed: 0.43821
Iter 9/10: ladvise speed: 0.440492
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.419238
Iter 10/10: OSS cache speed: 0.434736
Iter 10/10: ladvise speed: 0.449779
Average uncached read: .41
Average speedup with OSS cached read:  .42 = +2%
Average speedup with ladvise willread:  .44 = +7%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0