== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:13:22 (1721880802)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.7253 s, 38.5 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-ffff8800b5956800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.86802
Iter 1/10: OSS cache speed: 3.14678
Iter 1/10: ladvise speed: 3.15495
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.90178
Iter 2/10: OSS cache speed: 3.20961
Iter 2/10: ladvise speed: 3.25434
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.83799
Iter 3/10: OSS cache speed: 3.06407
Iter 3/10: ladvise speed: 3.24219
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.89585
Iter 4/10: OSS cache speed: 3.12645
Iter 4/10: ladvise speed: 3.07284
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.86976
Iter 5/10: OSS cache speed: 3.11629
Iter 5/10: ladvise speed: 3.01031
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.91142
Iter 6/10: OSS cache speed: 3.03654
Iter 6/10: ladvise speed: 3.06289
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.89904
Iter 7/10: OSS cache speed: 3.23388
Iter 7/10: ladvise speed: 3.25898
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.93539
Iter 8/10: OSS cache speed: 3.23963
Iter 8/10: ladvise speed: 3.27488
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.99236
Iter 9/10: OSS cache speed: 3.26776
Iter 9/10: ladvise speed: 3.28328
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.68726
Iter 10/10: OSS cache speed: 3.18309
Iter 10/10: ladvise speed: 3.22658
Average uncached read: 2.87
Average speedup with OSS cached read: 3.16 = +10.10%
Average speedup with ladvise willread: 3.18 = +10.80%
Speedup with OSS cached read less than 20%, got 10.10%. Skipping ladvise willread check.
fail_loc=0