== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 20:56:39 (1772762199)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.02293 s, 17.4 MB/s
llite.lustre-ffff8fc4430e5800.read_ahead_stats=clear
llite.lustre-ffff8fc4430e5800.read_ahead_stats=
snapshot_time             1772762216.200983193 secs.nsecs
start_time                1772762207.234225919 secs.nsecs
elapsed_time              8.966757274 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=237194: Thu Mar  5 21:03:59 2026
  read: IOPS=12, BW=12.2MiB/s (12.8MB/s)(5120MiB/420314msec)
    clat (msec): min=45, max=251, avg=81.89, stdev=31.98
     lat (msec): min=45, max=251, avg=81.89, stdev=31.98
    clat percentiles (msec):
     |  1.00th=[   55],  5.00th=[   59], 10.00th=[   61], 20.00th=[   63],
     | 30.00th=[   65], 40.00th=[   67], 50.00th=[   69], 60.00th=[   72],
     | 70.00th=[   75], 80.00th=[   83], 90.00th=[  144], 95.00th=[  153],
     | 99.00th=[  182], 99.50th=[  201], 99.90th=[  230], 99.95th=[  234],
     | 99.99th=[  253]
   bw (  KiB/s): min= 4087, max=18432, per=100.00%, avg=12507.07, stdev=4027.01, samples=838
   iops        : min=    3, max=   18, avg=12.14, stdev= 3.95, samples=838
  lat (msec)   : 50=0.23%, 100=82.40%, 250=17.34%, 500=0.02%
  cpu          : usr=0.64%, sys=85.89%, ctx=14007, majf=5133, minf=1305854
  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=12.2MiB/s (12.8MB/s), 12.2MiB/s-12.2MiB/s (12.8MB/s-12.8MB/s), io=5120MiB (5369MB), run=420314-420314msec