== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:41:28 (1783518088)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.88016 s, 17.8 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-ffff8a9a0835b800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.124
Iter 1/10: OSS cache speed: 2.41368
Iter 1/10: ladvise speed: 2.4173
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.19077
Iter 2/10: OSS cache speed: 2.3594
Iter 2/10: ladvise speed: 2.42225
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.28516
Iter 3/10: OSS cache speed: 2.33912
Iter 3/10: ladvise speed: 2.38114
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.27103
Iter 4/10: OSS cache speed: 2.36125
Iter 4/10: ladvise speed: 2.5537
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.36661
Iter 5/10: OSS cache speed: 2.63197
Iter 5/10: ladvise speed: 2.62639
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.19795
Iter 6/10: OSS cache speed: 2.39595
Iter 6/10: ladvise speed: 2.39751
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.27738
Iter 7/10: OSS cache speed: 2.37538
Iter 7/10: ladvise speed: 2.30778
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.22053
Iter 8/10: OSS cache speed: 2.35969
Iter 8/10: ladvise speed: 2.37272
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.27872
Iter 9/10: OSS cache speed: 2.35335
Iter 9/10: ladvise speed: 2.46717
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.18139
Iter 10/10: OSS cache speed: 2.38603
Iter 10/10: ladvise speed: 2.37778
Average uncached read: 2.23
Average speedup with OSS cached read:  2.39 = +7%
Average speedup with ladvise willread:  2.43 = +8%
Speedup with OSS cached read less than 20%,  got 7%. Skipping ladvise willread check.
fail_loc=0