== sanity test 255a: check 'lfs ladvise -a willread' ===== 16:11:03 (1788466263)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.2372 s, 8.6 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-ffff8d1450262000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.339712
Iter 1/10: OSS cache speed: 0.386745
Iter 1/10: ladvise speed: 0.371715
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.345341
Iter 2/10: OSS cache speed: 0.31333
Iter 2/10: ladvise speed: 0.372893
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.369595
Iter 3/10: OSS cache speed: 0.294982
Iter 3/10: ladvise speed: 0.345628
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.365956
Iter 4/10: OSS cache speed: 0.375026
Iter 4/10: ladvise speed: 0.418355
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.4052
Iter 5/10: OSS cache speed: 0.405365
Iter 5/10: ladvise speed: 0.420802
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.430005
Iter 6/10: OSS cache speed: 0.485606
Iter 6/10: ladvise speed: 0.50241
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.466041
Iter 7/10: OSS cache speed: 0.461009
Iter 7/10: ladvise speed: 0.412624
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.420022
Iter 8/10: OSS cache speed: 0.409999
Iter 8/10: ladvise speed: 0.462433
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.351289
Iter 9/10: OSS cache speed: 0.41213
Iter 9/10: ladvise speed: 0.354394
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.344468
Iter 10/10: OSS cache speed: 0.375842
Iter 10/10: ladvise speed: 0.322607
Average uncached read: .38
Average speedup with OSS cached read:  .39 = +2%
Average speedup with ladvise willread:  .39 = +2%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0