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([2402:e280:21c6:671:f16e:2102:25ad:9cdb]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-33e939fdd91sm943147eec.4.2026.09.22.14.11.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Sep 2026 14:11:57 -0700 (PDT) From: "Hemendra M. Naik" To: netdev@vger.kernel.org Cc: jiri@resnulli.us, jhs@mojatatu.com, linux-kernel@vger.kernel.org, vishy0777@gmail.com, tahiliani@nitk.edu.in, "Hemendra M. Naik" Subject: [PATCH iproute2-next v7 1/2] tc: fq_pie: add support for printing per-flow PIE statistics Date: Wed, 23 Sep 2026 02:41:38 +0530 Message-Id: <20260922211139.38570-2-hemendranaik@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260922211139.38570-1-hemendranaik@gmail.com> References: <20260922211139.38570-1-hemendranaik@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" `tc -s class show` for an fq_pie qdisc now prints the following per-flow PIE statistics: prob drop probability for the flow delay per-flow queue sojourn time (microseconds) deficit remaining DRR byte credits (signed integer) avg_dq_rate dequeue rate estimate in bytes/second (dq_rate_estimator mode only) avg_dq_rate is formatted using tc_print_rate(), which converts the kernel's bytes/second value to a human-readable bits/second string (e.g. 3906Kbit), consistent with how other tc schedulers display rate fields. Add `tc -s class show` examples to tc-fq_pie(8) demonstrating the new per-flow statistics with and without dq_rate_estimator enabled. Signed-off-by: Hemendra M. Naik Signed-off-by: Vishal Kamath Signed-off-by: Mohit P. Tahiliani --- man/man8/tc-fq_pie.8 | 18 ++++++++++++++ tc/q_fq_pie.c | 59 ++++++++++++++++++++++++++++++-------------- 2 files changed, 58 insertions(+), 19 deletions(-) diff --git a/man/man8/tc-fq_pie.8 b/man/man8/tc-fq_pie.8 index 457a56bb..8027783c 100644 --- a/man/man8/tc-fq_pie.8 +++ b/man/man8/tc-fq_pie.8 @@ -153,6 +153,24 @@ dq_rate_estimator pkts_in 6082 overlimit 0 overmemory 0 dropped 4 ecn_mark 0 new_flow_count 94 new_flows_len 0 old_flows_len 8 memory_used 1157632 =20 +# tc qdisc add dev eth0 parent 100:1 handle 200: fq_pie target 2ms flows 3 +.br +# tc -s class show dev eth0 +.br +class fq_pie 200:2 parent 200: + Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) + backlog 22800b 2p requeues 0 + prob 0.57679 delay 2.38ms deficit -52 + +# tc qdisc add dev eth0 parent 100:1 handle 200: fq_pie target 2ms flows 3= dq_rate_estimator +.br +# tc -s class show dev eth0 +.br +class fq_pie 200:2 parent 200: + Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0) + backlog 22800b 2p requeues 0 + prob 0.57679 delay 2.38ms deficit -52 avg_dq_rate 10742Kbit + .SH SEE ALSO .BR tc (8), .BR tc-pie (8), diff --git a/tc/q_fq_pie.c b/tc/q_fq_pie.c index dc2710cd..0c85e17f 100644 --- a/tc/q_fq_pie.c +++ b/tc/q_fq_pie.c @@ -274,6 +274,8 @@ static int fq_pie_print_xstats(const struct qdisc_util = *qu, FILE *f, { struct tc_fq_pie_xstats _st =3D {}, *st; =20 + SPRINT_BUF(b1); + if (xstats =3D=3D NULL) return 0; =20 @@ -283,25 +285,44 @@ static int fq_pie_print_xstats(const struct qdisc_uti= l *qu, FILE *f, st =3D &_st; } =20 - print_uint(PRINT_ANY, "pkts_in", " pkts_in %u", - st->packets_in); - print_uint(PRINT_ANY, "overlimit", " overlimit %u", - st->overlimit); - print_uint(PRINT_ANY, "overmemory", " overmemory %u", - st->overmemory); - print_uint(PRINT_ANY, "dropped", " dropped %u", - st->dropped); - print_uint(PRINT_ANY, "ecn_mark", " ecn_mark %u", - st->ecn_mark); - print_nl(); - print_uint(PRINT_ANY, "new_flow_count", " new_flow_count %u", - st->new_flow_count); - print_uint(PRINT_ANY, "new_flows_len", " new_flows_len %u", - st->new_flows_len); - print_uint(PRINT_ANY, "old_flows_len", " old_flows_len %u", - st->old_flows_len); - print_uint(PRINT_ANY, "memory_used", " memory_used %u", - st->memory_usage); + if (!st->type || st->type =3D=3D TCA_FQ_PIE_XSTATS_QDISC) { + print_uint(PRINT_ANY, "pkts_in", " pkts_in %u", + st->packets_in); + print_uint(PRINT_ANY, "overlimit", " overlimit %u", + st->overlimit); + print_uint(PRINT_ANY, "overmemory", " overmemory %u", + st->overmemory); + print_uint(PRINT_ANY, "dropped", " dropped %u", + st->dropped); + print_uint(PRINT_ANY, "ecn_mark", " ecn_mark %u", + st->ecn_mark); + print_nl(); + print_uint(PRINT_ANY, "new_flow_count", " new_flow_count %u", + st->new_flow_count); + print_uint(PRINT_ANY, "new_flows_len", " new_flows_len %u", + st->new_flows_len); + print_uint(PRINT_ANY, "old_flows_len", " old_flows_len %u", + st->old_flows_len); + print_uint(PRINT_ANY, "memory_used", " memory_used %u", + st->memory_usage); + print_nl(); + } + + if (st->type =3D=3D TCA_FQ_PIE_XSTATS_CLASS) { + print_float(PRINT_ANY, "prob", " prob %lg", + (double)st->class_stats.prob / (double)UINT64_MAX); + print_uint(PRINT_JSON, "delay", NULL, st->class_stats.delay); + print_string(PRINT_FP, NULL, " delay %s", + sprint_time(st->class_stats.delay, b1)); + print_int(PRINT_ANY, "deficit", " deficit %d", + st->class_stats.deficit); 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([2402:e280:21c6:671:f16e:2102:25ad:9cdb]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-33e939fdd91sm943147eec.4.2026.09.22.14.12.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Sep 2026 14:12:11 -0700 (PDT) From: "Hemendra M. Naik" To: netdev@vger.kernel.org Cc: jiri@resnulli.us, jhs@mojatatu.com, linux-kernel@vger.kernel.org, vishy0777@gmail.com, tahiliani@nitk.edu.in, "Hemendra M. Naik" Subject: [PATCH iproute2-next v7 2/2] tc: pie: print avg_dq_rate in human-readable format Date: Wed, 23 Sep 2026 02:41:39 +0530 Message-Id: <20260922211139.38570-3-hemendranaik@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260922211139.38570-1-hemendranaik@gmail.com> References: <20260922211139.38570-1-hemendranaik@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Print avg_dq_rate using tc_print_rate() instead of displaying the raw bytes/second value. This converts the kernel-provided rate to a human-readable bits/second string (for example, 10742Kbit), consistent with how other tc schedulers display rate statistics. Update the tc-pie(8) example to match the new output format. Signed-off-by: Hemendra M. Naik Signed-off-by: Vishal Kamath Signed-off-by: Mohit P. Tahiliani --- man/man8/tc-pie.8 | 2 +- tc/q_pie.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/man/man8/tc-pie.8 b/man/man8/tc-pie.8 index 5a8c7820..ec0d4af2 100644 --- a/man/man8/tc-pie.8 +++ b/man/man8/tc-pie.8 @@ -115,7 +115,7 @@ is turned off. qdisc pie 8036: dev eth0 root refcnt 2 limit 1000p target 15.0ms tupdat= e 16.0ms alpha 2 beta 20 Sent 63947420 bytes 42414 pkt (dropped 41, overlimits 0 requeues 0) backlog 271006b 179p requeues 0 - prob 0.000092 delay 22200us avg_dq_rate 12145996 + prob 0.000092 delay 22200us avg_dq_rate 10742Kbit pkts_in 41 overlimit 343 dropped 0 maxq 50 ecn_mark 0 =20 # tc qdisc add dev eth0 root pie limit 100 target 20ms tupdate 30ms ecn diff --git a/tc/q_pie.c b/tc/q_pie.c index 04c9aa61..97690d49 100644 --- a/tc/q_pie.c +++ b/tc/q_pie.c @@ -220,8 +220,8 @@ static int pie_print_xstats(const struct qdisc_util *qu= , FILE *f, print_string(PRINT_FP, NULL, " delay %s", sprint_time(st->delay, b1)); =20 if (st->dq_rate_estimating) - print_uint(PRINT_ANY, "avg_dq_rate", " avg_dq_rate %u", - st->avg_dq_rate); + tc_print_rate(PRINT_ANY, "avg_dq_rate", " avg_dq_rate %s", + st->avg_dq_rate); =20 print_nl(); print_uint(PRINT_ANY, "pkts_in", " pkts_in %u", st->packets_in); --=20 2.34.1