On Fri, Dec 27, 2024 at 11:05:07PM -0300, Leonardo Brás wrote: > On Sat, 2024-12-28 at 10:54 +0900, Akira Yokosawa wrote: > > Hi, > > > > Looks like I didn't make my point clear enough... > > > > On 2024/12/28 10:29, Leonardo Bras wrote: > > > Gitlab-CI is failing[1] on building CodeSamples due to liburcu v0.15 > > > deprecating[2] support for liburcu-signal: > > > > > > %%% > > > * Deprecation of liburcu-signal > > > > > > Users can migrate to liburcu-memb with a kernel implementing the > > > membarrier(2) system call to have similar read-side performance without > > > requiring use of a reserved signal, and with improved grace period > > > performance. > > > %%% > > > > > > Also, from liburcu.org: > > > > > > %%% > > > Usage of liburcu > > > 1. #include <urcu.h> > > > 2. Link the application with -lurcu > > > > > > This is the preferred version of the library, in terms of grace-period > > > detection speed, read-side speed and flexibility. Dynamically detects > > > kernel support for sys_membarrier(). Falls back on urcu-mb scheme if > > > support is not present, which has slower read-side. > > > %%% > > > > > > Which tl;dr means for any system running a current version of liburcu, > > > liburcu-signal should not be needed to build/run the CodeSamples. > > > > > > Remove -lurcu-signal from all CodeSamples/*/Makefile to avoid using it on > > > linking stage. > > > > No, this change will break builds with liburcu <0.15. > > > > What I wanted say was to keep building with liburcu <0.15 possible. > > Not to expand the changelog... > > > > I don't think it is reasonable to expect people install latest liburcu. > > right away. > > > > Please reconsider. > > Oh, I see the point. > > I understand the issue, and I think we could check for an older liburcu version > to add the -lurcu-signal only for versions < 0.15. > > On the other hand, sys_membarrier() was introduced in 2015 (5b25b13ab08f6), and > no supported kernel (>v4.2) should still miss this syscall. Is it worth the > added complexity? Is so, let's do it. If the -lurcu-signal is left off for old versions of the userspace RCU library, doesn't it simply fall back to using explicit memory barriers? Or am I yet again misremembering? Thanx, Paul > Thanks! > Leo > > > > > Thanks, Akira > > > > > > > > Signed-off-by: Leonardo Bras <leobras.c@xxxxxxxxx> > > > > > > [1] https://gitlab.com/linux-kernel/perfbook/-/jobs/8732944799 > > > [2] https://lists.lttng.org/pipermail/lttng-dev/2024-December/030893.html > > > > > > --- > > > CodeSamples/datastruct/Issaquah/Makefile | 4 +-- > > > CodeSamples/datastruct/existence/Makefile | 32 +++++++++++------------ > > > CodeSamples/datastruct/hash/Makefile | 6 ++--- > > > CodeSamples/datastruct/skiplist/Makefile | 4 +-- > > > CodeSamples/defer/Makefile | 6 ++--- > > > 5 files changed, 26 insertions(+), 26 deletions(-) > > > > > > diff --git a/CodeSamples/datastruct/Issaquah/Makefile b/CodeSamples/datastruct/Issaquah/Makefile > > > index c3b724d7..187d10a7 100644 > > > --- a/CodeSamples/datastruct/Issaquah/Makefile > > > +++ b/CodeSamples/datastruct/Issaquah/Makefile > > > @@ -38,17 +38,17 @@ GCC_ARGS += -fcommon > > > # use something like jemalloc() instead of glibc malloc(). > > > # If you install jemalloc at /home/paulmck/jemalloc, you will > > > # need the following additional arguments to cc: > > > # -I/home/paulmck/jemalloc/include > > > # -L/home/paulmck/jemalloc/lib > > > # -Wl,--rpath,/home/paulmck/jemalloc/lib > > > # -DUSE_JEMALLOC > > > # Verify by using the nm command and searching output for malloc. > > > > > > existence_test: existence.c existence_test.c > > > - cc $(GCC_ARGS) -o existence_test existence.c existence_test.c -lpthread -lurcu -lurcu-signal > > > + cc $(GCC_ARGS) -o existence_test existence.c existence_test.c -lpthread -lurcu > > > > > > treetorture: tree.c existence.c spinlockmult.c $(LIB)/random.c ../../api.h treetorture.h treetorturetrace.h $(LIB)/random.h existence.h tree.h > > > - cc $(GCC_ARGS) -o treetorture tree.c existence.c spinlockmult.c $(LIB)/random.c -lpthread -lurcu -lurcu-signal > > > + cc $(GCC_ARGS) -o treetorture tree.c existence.c spinlockmult.c $(LIB)/random.c -lpthread -lurcu > > > > > > clean: > > > rm -f $(PROGS) > > > diff --git a/CodeSamples/datastruct/existence/Makefile b/CodeSamples/datastruct/existence/Makefile > > > index 19891c0f..027d54fb 100644 > > > --- a/CodeSamples/datastruct/existence/Makefile > > > +++ b/CodeSamples/datastruct/existence/Makefile > > > @@ -37,47 +37,47 @@ all: $(PROGS) > > > # need the following additional arguments to cc: > > > # -I/home/paulmck/jemalloc/include > > > # -L/home/paulmck/jemalloc/lib > > > # -Wl,--rpath,/home/paulmck/jemalloc/lib > > > # -DUSE_JEMALLOC > > > # Verify by using the nm command and searching output for malloc. > > > # > > > # So it is quite a bit easier to just use the default locations. ;-) > > > > > > existence_test: existence.h existence_test.c procon.h > > > - cc $(GCC_ARGS) -o existence_test existence_test.c -lpthread -lurcu -lurcu-signal > > > + cc $(GCC_ARGS) -o existence_test existence_test.c -lpthread -lurcu > > > > > > existence_3hash_test: existence.h hash_exists.h keyvalue.h existence_3hash_test.c procon.h > > > - cc $(GCC_ARGS) -o existence_3hash_test existence_3hash_test.c -lpthread -lurcu -lurcu-signal > > > + cc $(GCC_ARGS) -o existence_3hash_test existence_3hash_test.c -lpthread -lurcu > > > > > > existence_3hash_uperf: existence.h hash_exists.h keyvalue.h existence_3hash_uperf.c procon.h > > > - # cc -O0 -Wall -ggdb -fno-inline -o existence_3hash_uperf existence_3hash_uperf.c -ltcmalloc -lpthread -lurcu -lurcu-signal > > > - cc $(GCC_ARGS) -o existence_3hash_uperf existence_3hash_uperf.c -ltcmalloc -lpthread -lurcu -lurcu-signal > > > + # cc -O0 -Wall -ggdb -fno-inline -o existence_3hash_uperf existence_3hash_uperf.c -ltcmalloc -lpthread -lurcu > > > + cc $(GCC_ARGS) -o existence_3hash_uperf existence_3hash_uperf.c -ltcmalloc -lpthread -lurcu > > > > > > existence_3skiplist_test: existence.h skiplist_exists.h keyvalue.h existence_3skiplist_test.c procon.h > > > - cc -g -O0 -o existence_3skiplist_test existence_3skiplist_test.c $(LIB)/random.c -lpthread -lurcu -lurcu-signal > > > - # cc $(GCC_ARGS) -o existence_3skiplist_test existence_3skiplist_test.c $(LIB)/random.c -lpthread -lurcu -lurcu-signal > > > + cc -g -O0 -o existence_3skiplist_test existence_3skiplist_test.c $(LIB)/random.c -lpthread -lurcu > > > + # cc $(GCC_ARGS) -o existence_3skiplist_test existence_3skiplist_test.c $(LIB)/random.c -lpthread -lurcu > > > > > > existence_3skiplist_uperf: existence.h hash_exists.h keyvalue.h existence_3skiplist_uperf.c procon.h > > > - # cc -O0 -Wall -ggdb -fno-inline -o existence_3skiplist_uperf existence_3skiplist_uperf.c -ltcmalloc $(LIB)/random.c -lpthread -lurcu -lurcu-signal > > > - cc $(GCC_ARGS) -o existence_3skiplist_uperf existence_3skiplist_uperf.c -ltcmalloc $(LIB)/random.c -lpthread -lurcu -lurcu-signal > > > + # cc -O0 -Wall -ggdb -fno-inline -o existence_3skiplist_uperf existence_3skiplist_uperf.c -ltcmalloc $(LIB)/random.c -lpthread -lurcu > > > + cc $(GCC_ARGS) -o existence_3skiplist_uperf existence_3skiplist_uperf.c -ltcmalloc $(LIB)/random.c -lpthread -lurcu > > > > > > kaleidoscope_test: kaleidoscope.h kaleidoscope_test.c procon.h > > > - cc $(GCC_ARGS) -o kaleidoscope_test kaleidoscope_test.c -lpthread -lurcu -lurcu-signal > > > + cc $(GCC_ARGS) -o kaleidoscope_test kaleidoscope_test.c -lpthread -lurcu > > > > > > kaleidoscope_3hash_test: kaleidoscope.h hash_exists.h keyvalue.h kaleidoscope_3hash_test.c procon.h > > > - cc $(GCC_ARGS) -o kaleidoscope_3hash_test kaleidoscope_3hash_test.c -lpthread -lurcu -lurcu-signal > > > + cc $(GCC_ARGS) -o kaleidoscope_3hash_test kaleidoscope_3hash_test.c -lpthread -lurcu > > > > > > kaleidoscope_3skiplist_test: kaleidoscope.h skiplist_exists.h keyvalue.h kaleidoscope_3skiplist_test.c procon.h > > > - cc -g -O0 -o kaleidoscope_3skiplist_test kaleidoscope_3skiplist_test.c $(LIB)/random.c -lpthread -lurcu -lurcu-signal > > > - # cc $(GCC_ARGS) -o kaleidoscope_3skiplist_test kaleidoscope_3skiplist_test.c $(LIB)/random.c -lpthread -lurcu -lurcu-signal > > > + cc -g -O0 -o kaleidoscope_3skiplist_test kaleidoscope_3skiplist_test.c $(LIB)/random.c -lpthread -lurcu > > > + # cc $(GCC_ARGS) -o kaleidoscope_3skiplist_test kaleidoscope_3skiplist_test.c $(LIB)/random.c -lpthread -lurcu > > > > > > kaleidoscope_skiphash_test: kaleidoscope.h skiplist_exists.h keyvalue.h kaleidoscope_skiphash_test.c procon.h > > > - cc -g -O0 -o kaleidoscope_skiphash_test kaleidoscope_skiphash_test.c $(LIB)/random.c -lpthread -lurcu -lurcu-signal > > > - # cc $(GCC_ARGS) -o kaleidoscope_skiphash_test kaleidoscope_skiphash_test.c $(LIB)/random.c -lpthread -lurcu -lurcu-signal > > > + cc -g -O0 -o kaleidoscope_skiphash_test kaleidoscope_skiphash_test.c $(LIB)/random.c -lpthread -lurcu > > > + # cc $(GCC_ARGS) -o kaleidoscope_skiphash_test kaleidoscope_skiphash_test.c $(LIB)/random.c -lpthread -lurcu > > > > > > procon_test: procon.h procon_test.c > > > - cc -O0 -g -o procon_test procon_test.c -lpthread -lurcu -lurcu-signal > > > - # cc $(GCC_ARGS) -o procon_test procon_test.c -lpthread -lurcu -lurcu-signal > > > + cc -O0 -g -o procon_test procon_test.c -lpthread -lurcu > > > + # cc $(GCC_ARGS) -o procon_test procon_test.c -lpthread -lurcu > > > > > > clean: > > > rm -f $(PROGS) > > > diff --git a/CodeSamples/datastruct/hash/Makefile b/CodeSamples/datastruct/hash/Makefile > > > index a56255a2..7d47485a 100644 > > > --- a/CodeSamples/datastruct/hash/Makefile > > > +++ b/CodeSamples/datastruct/hash/Makefile > > > @@ -37,29 +37,29 @@ GCC_ARGS += -fcommon > > > hash_bkt: hash_bkt.c ../../api.h hashtorture.h > > > cc $(GCC_ARGS) -DTEST_HASH -o hash_bkt hash_bkt.c $(LIB)/random.c -lpthread > > > > > > hash_bkt_ref: hash_bkt_ref.c ../../api.h hashtorture.h > > > cc $(GCC_ARGS) -DTEST_HASH -o hash_bkt_ref hash_bkt_ref.c $(LIB)/random.c -lpthread > > > > > > hash_bkt_qsbr: hash_bkt_rcu.c ../../api.h hashtorture.h > > > cc $(GCC_ARGS) -DTEST_HASH -DPERFBOOK_RCU_QSBR -o hash_bkt_qsbr hash_bkt_rcu.c $(LIB)/random.c -lpthread -lurcu -lurcu-qsbr > > > > > > hash_bkt_rcu: hash_bkt_rcu.c ../../api.h hashtorture.h > > > - cc $(GCC_ARGS) -DTEST_HASH -o hash_bkt_rcu hash_bkt_rcu.c $(LIB)/random.c -lpthread -lurcu -lurcu-signal > > > + cc $(GCC_ARGS) -DTEST_HASH -o hash_bkt_rcu hash_bkt_rcu.c $(LIB)/random.c -lpthread -lurcu > > > > > > hash_bkt_hazptr: hash_bkt_hazptr.c ../../defer/hazptr.c ../../defer/hazptr.h ../../api.h hashtorture.h > > > cc $(GCC_ARGS) -DTEST_HASH -o hash_bkt_hazptr hash_bkt_hazptr.c ../../defer/hazptr.c $(LIB)/random.c -lpthread > > > > > > hash_global: hash_global.c ../../api.h hashtorture.h > > > cc $(GCC_ARGS) -DTEST_HASH -o hash_global hash_global.c $(LIB)/random.c -lpthread > > > > > > hash_resize: hash_resize.c ../../api.h hashtorture.h > > > - cc $(GCC_ARGS) -DTEST_HASH -o hash_resize hash_resize.c $(LIB)/random.c -lpthread -lurcu -lurcu-signal > > > + cc $(GCC_ARGS) -DTEST_HASH -o hash_resize hash_resize.c $(LIB)/random.c -lpthread -lurcu > > > > > > hash_resize_s: hash_resize_s.c ../../api.h hashtorture.h > > > - cc $(GCC_ARGS) -DTEST_HASH -o hash_resize_s hash_resize_s.c $(LIB)/random.c -lpthread -lurcu -lurcu-signal > > > + cc $(GCC_ARGS) -DTEST_HASH -o hash_resize_s hash_resize_s.c $(LIB)/random.c -lpthread -lurcu > > > > > > hash_unsync: hash_unsync.c ../../api.h hashtorture.h > > > cc $(GCC_ARGS) -DTEST_HASH -o hash_unsync hash_unsync.c $(LIB)/random.c -lpthread > > > > > > clean: > > > rm -f $(PROGS) > > > diff --git a/CodeSamples/datastruct/skiplist/Makefile b/CodeSamples/datastruct/skiplist/Makefile > > > index 3a555691..931c8c1c 100644 > > > --- a/CodeSamples/datastruct/skiplist/Makefile > > > +++ b/CodeSamples/datastruct/skiplist/Makefile > > > @@ -26,17 +26,17 @@ include $(top)/depends.mk > > > ifeq ($(strip $(target)),) > > > all: > > > @echo "### None in datastruct/skiplist/ can be built on arch: '$(arch)'." > > > else > > > all: $(PROGS) > > > endif > > > > > > include $(top)/recipes.mk > > > > > > skiplist: skiplist.c ../../api.h skiplisttorture.h skiplist.h > > > - cc $(GCC_ARGS) -DTEST_SKIPLIST -I $(LIB) -g -o skiplist skiplist.c $(LIB)/random.c -lpthread -lurcu -lurcu-signal > > > + cc $(GCC_ARGS) -DTEST_SKIPLIST -I $(LIB) -g -o skiplist skiplist.c $(LIB)/random.c -lpthread -lurcu > > > > > > skiplist_glock: skiplist_glock.c ../../api.h skiplisttorture.h skiplist.h > > > - cc $(GCC_ARGS) -DTEST_SKIPLIST -I $(LIB) -g -o skiplist_glock skiplist_glock.c $(LIB)/random.c -lpthread -lurcu -lurcu-signal > > > + cc $(GCC_ARGS) -DTEST_SKIPLIST -I $(LIB) -g -o skiplist_glock skiplist_glock.c $(LIB)/random.c -lpthread -lurcu > > > > > > clean: > > > rm -f $(PROGS) > > > diff --git a/CodeSamples/defer/Makefile b/CodeSamples/defer/Makefile > > > index 3cf3e5a5..8454a9ed 100644 > > > --- a/CodeSamples/defer/Makefile > > > +++ b/CodeSamples/defer/Makefile > > > @@ -73,21 +73,21 @@ bug_rcu_dp: bug_rcu_dp.c ../api.h > > > gettimestamp: gettimestamp.c ../api.h rcutorture.h > > > cc $(GCC_ARGS) -o gettimestamp -DTEST gettimestamp.c -lpthread > > > > > > gettimestampmp: gettimestampmp.c ../api.h rcutorture.h > > > cc $(GCC_ARGS) -o gettimestampmp -DTEST gettimestampmp.c -lpthread > > > > > > hazptr: hazptr.c hazptr.h ../api.h hazptrtorture.h > > > cc $(GCC_ARGS) -o hazptr -DTEST hazptr.c -lpthread > > > > > > ptxroute: ptxroute.c ../api.h > > > - cc $(GCC_ARGS) -o ptxroute ptxroute.c -lpthread -lurcu -lurcu-signal > > > + cc $(GCC_ARGS) -o ptxroute ptxroute.c -lpthread -lurcu > > > > > > rcu: rcu.c rcu.h ../api.h rcutorture.h > > > cc $(GCC_ARGS) -o rcu -DTEST rcu.c -lpthread > > > > > > rcu64: rcu64.c rcu64.h ../api.h rcutorture.h > > > cc $(GCC_ARGS) -o rcu64 -DTEST rcu64.c -lpthread > > > > > > rcu64_atomicgp: rcu64_atomicgp.c rcu64_atomicgp.h ../api.h rcutorture.h > > > cc $(GCC_ARGS) -o rcu64_atomicgp -DTEST rcu64_atomicgp.c -lpthread > > > > > > @@ -124,32 +124,32 @@ rcu_rcpls: rcu_rcpls.c rcu_rcpls.h ../api.h rcutorture.h > > > rcu_sig: rcu_sig.c rcu_sig.h ../api.h rcutorture.h > > > cc $(GCC_ARGS) -o rcu_sig -DTEST rcu_sig.c -lpthread > > > > > > rcu_ts: rcu_ts.c rcu_ts.h ../api.h rcutorture.h > > > cc $(GCC_ARGS) -o rcu_ts -DTEST rcu_ts.c -lpthread > > > > > > route_hazptr: route_hazptr.c hazptr.c hazptr.h ../api.h ../lib/random.h ../lib/random.c routetorture.h > > > cc $(GCC_ARGS) -o route_hazptr route_hazptr.c hazptr.c ../lib/random.c -lpthread > > > > > > route_rcu: route_rcu.c ../api.h ../lib/random.h ../lib/random.c routetorture.h > > > - cc $(GCC_ARGS) -o route_rcu route_rcu.c ../lib/random.c -lpthread -lurcu -lurcu-signal > > > + cc $(GCC_ARGS) -o route_rcu route_rcu.c ../lib/random.c -lpthread -lurcu > > > > > > route_rcu_qsbr: route_rcu.c ../api.h ../lib/random.h ../lib/random.c routetorture.h > > > cc $(GCC_ARGS) -o route_rcu_qsbr -DDO_QSBR route_rcu.c ../lib/random.c -lpthread -lurcu-qsbr > > > > > > route_refcnt: route_refcnt.c ../api.h ../lib/random.h ../lib/random.c routetorture.h > > > cc $(GCC_ARGS) -o route_refcnt route_refcnt.c ../lib/random.c -lpthread > > > > > > route_seq: route_seq.c ../api.h ../lib/random.h ../lib/random.c routetorture.h > > > cc $(GCC_ARGS) -o route_seq route_seq.c ../lib/random.c -lpthread > > > > > > route_seqlock: route_seqlock.c ../api.h seqlock.h ../lib/random.h ../lib/random.c routetorture.h > > > cc $(GCC_ARGS) -o route_seqlock route_seqlock.c ../lib/random.c -lpthread > > > > > > seqlocktorture: seqlocktorture.c seqlock.h ../api.h > > > cc $(GCC_ARGS) -o seqlocktorture seqlocktorture.c -lpthread > > > > > > singleton: singleton.c ../api.h ../lib/random.h ../lib/random.c > > > - cc $(GCC_ARGS) -Wall -g -o singleton singleton.c ../lib/random.c -lpthread -lurcu -lurcu-signal > > > + cc $(GCC_ARGS) -Wall -g -o singleton singleton.c ../lib/random.c -lpthread -lurcu > > > > > > clean: > > > rm -f $(PROGS) >
