The only coincidence is "large files" the rest is different but may worth check , if you are talking about rawhide. https://pagure.io/copr/copr/issue/2241 On Tue, 2022-07-12 at 00:52 +0200, Marius Schwarz wrote: > > Hi, > > I have just create(d/ not finished yet, started 15 minutes ago) a > ~2.5 > GB rpm and found, that rpmbuild is an extrem bottleneck. > > IMHO, this is caused by a fileread function which reads files in 32k > blocks, which is very slow and extrem IO intensive. The result is a > task running at 1 core at 100% perma. With changes to larger chunks, > we > can speed up so many build tasks on the farm. > > Multicore use would also be helpful i.e. while packing the files. > > Any counter-arguments ? > > strace example: > > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=477601377}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=477685727}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=477892054}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=478000076}) = 0 > [pid 2604060] read(5, "_I @_I s_I t_E\nauss\303\244het > auss\303\244h"..., 32768) = 32768 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=478212651}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=478301347}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=478409015}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=478505273}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=478701366}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=478784826}) = 0 > [pid 2604060] read(5, " Y_I k_I t_E\naustun austun 'aU_B"..., 32768) > = 32768 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=478962539}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=479045029}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=479130924}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=479213446}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=479407336}) = 0 > [pid 2604060] clock_gettime(CLOCK_REAobjections > LTIME, {tv_sec=1657579222, tv_nsec=479489832}) = 0 > [pid 2604060] read(5, "s_I v_I u:_I k_I s_I @_I s_E\naus"..., 32768) > = 32768 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=479720335}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=479803090}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=479950309}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=480067186}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=480305924}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=480417985}) = 0 > [pid 2604060] read(5, "B s_I ts_I u:_I g_I R_I E_I n_I "..., 32768) = > 32768 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=480654716}) = 0 > [pid 2604060] clock_gettime(CLOCK_REALTIME, {tv_sec=1657579222, > tv_nsec=480763606}) = 0 > > and I don't think, this tasks needs to read the clock that often too. > _______________________________________________ > devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx > To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx > Fedora Code of Conduct: > https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: > https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: > https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx > Do not reply to spam on the list, report it: > https://pagure.io/fedora-infrastructure -- Sérgio M. B. _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
