== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 06:41:40 (1768131700)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.97102 s, 17.6 MB/s
llite.lustre-ffff9aac591cf000.read_ahead_stats=clear
llite.lustre-ffff9aac591cf000.read_ahead_stats=
snapshot_time             1768131716.375038034 secs.nsecs
start_time                1768131708.448449507 secs.nsecs
elapsed_time              7.926588527 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          4 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=236462: Sun Jan 11 06:48:00 2026
  read: IOPS=14, BW=14.2MiB/s (14.9MB/s)(5120MiB/361425msec)
    clat (msec): min=36, max=231, avg=70.42, stdev=25.70
     lat (msec): min=36, max=231, avg=70.42, stdev=25.70
    clat percentiles (msec):
     |  1.00th=[   38],  5.00th=[   46], 10.00th=[   47], 20.00th=[   49],
     | 30.00th=[   52], 40.00th=[   57], 50.00th=[   62], 60.00th=[   67],
     | 70.00th=[   75], 80.00th=[  106], 90.00th=[  110], 95.00th=[  113],
     | 99.00th=[  129], 99.50th=[  150], 99.90th=[  220], 99.95th=[  222],
     | 99.99th=[  232]
   bw (  KiB/s): min= 4096, max=28672, per=100.00%, avg=14540.68, stdev=4729.73, samples=720
   iops        : min=    4, max=   28, avg=14.20, stdev= 4.62, samples=720
  lat (msec)   : 50=24.96%, 100=51.62%, 250=23.42%
  cpu          : usr=0.56%, sys=86.11%, ctx=13991, majf=5123, minf=1305865
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=14.2MiB/s (14.9MB/s), 14.2MiB/s-14.2MiB/s (14.9MB/s-14.9MB/s), io=5120MiB (5369MB), run=361425-361425msec