== sanity test 255a: check 'lfs ladvise -a willread' ===== 05:36:51 (1789637811)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4451 s, 8.4 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-ffff92a543ea2000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.340724
Iter 1/10: OSS cache speed: 0.381666
Iter 1/10: ladvise speed: 0.326298
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.287444
Iter 2/10: OSS cache speed: 0.280699
Iter 2/10: ladvise speed: 0.248931
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.324275
Iter 3/10: OSS cache speed: 0.335483
Iter 3/10: ladvise speed: 0.336583
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.346287
Iter 4/10: OSS cache speed: 0.313119
Iter 4/10: ladvise speed: 0.328557
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.349183
Iter 5/10: OSS cache speed: 0.290897
Iter 5/10: ladvise speed: 0.314592
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.300777
Iter 6/10: OSS cache speed: 0.301288
Iter 6/10: ladvise speed: 0.386473
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.394855
Iter 7/10: OSS cache speed: 0.394896
Iter 7/10: ladvise speed: 0.263713
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.342388
Iter 8/10: OSS cache speed: 0.345747
Iter 8/10: ladvise speed: 0.326202
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.310863
Iter 9/10: OSS cache speed: 0.358976
Iter 9/10: ladvise speed: 0.307737
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.317837
Iter 10/10: OSS cache speed: 0.305707
Iter 10/10: ladvise speed: 0.336975
Average uncached read: .33
Average speedup with OSS cached read:  .33 = +0%
Average speedup with ladvise willread:  .31 = +-6%
Speedup with OSS cached read less than 20%,  got 0%. Skipping ladvise willread check.
fail_loc=0