== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:53:06 (1763877186)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.00386 s, 15.0 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-ffff8c1dd854f000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.06488
Iter 1/10: OSS cache speed: 1.92569
Iter 1/10: ladvise speed: 1.93686
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.12222
Iter 2/10: OSS cache speed: 2.08314
Iter 2/10: ladvise speed: 2.09891
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.88378
Iter 3/10: OSS cache speed: 2.04219
Iter 3/10: ladvise speed: 1.60798
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.19473
Iter 4/10: OSS cache speed: 1.30194
Iter 4/10: ladvise speed: 1.94434
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.84854
Iter 5/10: OSS cache speed: 1.84662
Iter 5/10: ladvise speed: 1.57043
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.33514
Iter 6/10: OSS cache speed: 1.25106
Iter 6/10: ladvise speed: 1.21085
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.13214
Iter 7/10: OSS cache speed: 1.11092
Iter 7/10: ladvise speed: 1.10556
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.20801
Iter 8/10: OSS cache speed: 2.13011
Iter 8/10: ladvise speed: 1.6409
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.18144
Iter 9/10: OSS cache speed: 1.77227
Iter 9/10: ladvise speed: 1.36052
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.18816
Iter 10/10: OSS cache speed: 1.03479
Iter 10/10: ladvise speed: 1.35274
Average uncached read: 1.61
Average speedup with OSS cached read:  1.64 = +1%
Average speedup with ladvise willread:  1.58 = +-1%
Speedup with OSS cached read less than 20%,  got 1%. Skipping ladvise willread check.
fail_loc=0