== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:56:55 (1780325815)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.50571 s, 16.1 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-ffff9060c552a800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.00089
Iter 1/10: OSS cache speed: 1.07406
Iter 1/10: ladvise speed: 1.81963
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.893
Iter 2/10: OSS cache speed: 1.63121
Iter 2/10: ladvise speed: 1.53984
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.91266
Iter 3/10: OSS cache speed: 1.99606
Iter 3/10: ladvise speed: 1.96068
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.12071
Iter 4/10: OSS cache speed: 2.1616
Iter 4/10: ladvise speed: 2.19838
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.03161
Iter 5/10: OSS cache speed: 2.08325
Iter 5/10: ladvise speed: 1.16242
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.494867
Iter 6/10: OSS cache speed: 0.587906
Iter 6/10: ladvise speed: 0.620424
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.540686
Iter 7/10: OSS cache speed: 0.527241
Iter 7/10: ladvise speed: 0.460336
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.553228
Iter 8/10: OSS cache speed: 0.644224
Iter 8/10: ladvise speed: 0.658907
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.645627
Iter 9/10: OSS cache speed: 0.553471
Iter 9/10: ladvise speed: 0.604478
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.654052
Iter 10/10: OSS cache speed: 0.724936
Iter 10/10: ladvise speed: 0.545775
Average uncached read: 1.18
Average speedup with OSS cached read:  1.19 = +0%
Average speedup with ladvise willread:  1.15 = +-2%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0