== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:35:48 (1770647748)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.58986 s, 18.8 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-ffff8f7403809800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.079
Iter 1/10: OSS cache speed: 1.09283
Iter 1/10: ladvise speed: 1.37166
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.8013
Iter 2/10: OSS cache speed: 1.60135
Iter 2/10: ladvise speed: 1.16236
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.56839
Iter 3/10: OSS cache speed: 2.42486
Iter 3/10: ladvise speed: 2.31645
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.44122
Iter 4/10: OSS cache speed: 2.08373
Iter 4/10: ladvise speed: 1.82824
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.90628
Iter 5/10: OSS cache speed: 1.15793
Iter 5/10: ladvise speed: 1.40319
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.35997
Iter 6/10: OSS cache speed: 1.33892
Iter 6/10: ladvise speed: 2.10467
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.18903
Iter 7/10: OSS cache speed: 2.19268
Iter 7/10: ladvise speed: 2.15833
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.10515
Iter 8/10: OSS cache speed: 2.04706
Iter 8/10: ladvise speed: 2.23556
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.28998
Iter 9/10: OSS cache speed: 2.23636
Iter 9/10: ladvise speed: 2.24495
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.27331
Iter 10/10: OSS cache speed: 2.28273
Iter 10/10: ladvise speed: 2.30152
Average uncached read: 1.90
Average speedup with OSS cached read:  1.84 = +-3%
Average speedup with ladvise willread:  1.91 = +0%
Speedup with OSS cached read less than 20%,  got -3%. Skipping ladvise willread check.
fail_loc=0