| Message ID | 20210708120656.663851-1-thara.gopinath@linaro.org (mailing list archive) |
|---|---|
| Headers | show |
| Series | Introduce LMh driver for Qualcomm SoCs | expand |
Hi Thara! On 7/8/21 7:06 AM, Thara Gopinath wrote: > Limits Management Hardware(LMh) is a hardware infrastructure on some > Qualcomm SoCs that can enforce temperature and current limits as programmed > by software for certain IPs like CPU. On many newer SoCs LMh is configured > by firmware/TZ and no programming is needed from the kernel side. But on > certain SoCs like sdm845 the firmware does not do a complete programming of > the h/w block. On such SoCs kernel software has to explicitly set up the > temperature limits and turn on various monitoring and enforcing algorithms > on the hardware. > > Introduce support for enabling and programming various limit settings and > monitoring capabilities of Limits Management Hardware(LMh) associated with > cpu clusters. Also introduce support in cpufreq hardware driver to monitor > the interrupt associated with cpu frequency throttling so that this > information can be conveyed to the schdeuler via thermal pressure > interface. > > With this patch series following cpu performance improvement(30-70%) is > observed on sdm845. The reasoning here is that without LMh being programmed > properly from the kernel, the default settings were enabling thermal > mitigation for CPUs at too low a temperature (around 70-75 degree C). This > in turn meant that many a time CPUs were never actually allowed to hit the > maximum possible/required frequencies. > > UnixBench whets and dhry (./Run whets dhry) > System Benchmarks Index Score > > Without LMh Support With LMh Support > 1 copy test 1353.7 1773.2 > > 8 copy tests 4473.6 7402.3 > > Sysbench cpu > sysbench cpu --threads=8 --time=60 --cpu-max-prime=100000 run > > Without LMh Support With LMh Support > Events per > second 355 614 > > Avg Latency(ms) 21.84 13.02 > > v2->v3: > - Included patch adding dt binding documentation for LMh nodes. > - Rebased to v5.13 > > Thara Gopinath (6): > firmware: qcom_scm: Introduce SCM calls to access LMh > thermal: qcom: Add support for LMh driver > cpufreq: qcom-cpufreq-hw: Add dcvs interrupt support > arm64: boot: dts: qcom: sdm45: Add support for LMh node > arm64: boot: dts: qcom: sdm845: Remove cpufreq cooling devices for CPU > thermal zones > dt-bindings: thermal: Add dt binding for QCOM LMh > > .../devicetree/bindings/thermal/qcom-lmh.yaml | 100 ++++++++ > arch/arm64/boot/dts/qcom/sdm845.dtsi | 162 ++---------- > drivers/cpufreq/qcom-cpufreq-hw.c | 118 +++++++++ > drivers/firmware/qcom_scm.c | 58 +++++ > drivers/firmware/qcom_scm.h | 4 + > drivers/thermal/qcom/Kconfig | 10 + > drivers/thermal/qcom/Makefile | 1 + > drivers/thermal/qcom/lmh.c | 239 ++++++++++++++++++ > include/linux/qcom_scm.h | 14 + > 9 files changed, 570 insertions(+), 136 deletions(-) > create mode 100644 Documentation/devicetree/bindings/thermal/qcom-lmh.yaml > create mode 100644 drivers/thermal/qcom/lmh.c > I've been using these patches on a 5.13 kernel (https://github.com/steev/linux/tree/linux-5.13.y - while trying to track down a different issue, while playing a video on youtube, as well as compressing a 9.2GB file with xz, I got the following |Jul 21 21:44:21 limitless kernel: [ 5438.914591] EXT4-fs (loop0p1): mounting ext3 file system using the ext4 subsystem | |Jul 21 21:44:21 limitless kernel: [ 5438.920817] EXT4-fs (loop0p1): mounted filesystem with ordered data mode. Opts: (null). Quota mode: none. | |Jul 21 21:45:56 limitless kernel: [ 5533.893290] BUG: scheduling while atomic: swapper/0/0/0x00010000 | |Jul 21 21:45:56 limitless kernel: [ 5533.893333] Modules linked in: dm_mod loop tcp_diag inet_diag aes_ce_ccm rfcomm algif_hash algif_skcipher af_alg bnep lz4 lz4_compress q6asm_dai zram q6routing zsmalloc q6afe_dai q6adm q6asm q6afe q6dsp_common q6core snd_soc_wsa881x regmap_sdw snd_soc_wcd934x soundwire_qcom gpio_wcd934x binfmt_misc venus_enc venus_dec videobuf2_dma_contig nls_ascii nls_cp437 vfat fat wcd934x regmap_slimbus qrtr_smd fastrpc apr aes_ce_blk crypto_simd cryptd aes_ce_cipher crct10dif_ce ghash_ce gf128mul sha2_ce uvcvideo videobuf2_vmalloc videobuf2_memops hci_uart ath10k_snoc sha256_arm64 sha1_ce btqca ath10k_core ath btrtl mac80211 btbcm btintel snd_soc_sdm845 snd_soc_rt5663 snd_soc_qcom_common snd_soc_rl6231 soundwire_bus pm8941_pwrkey qcom_spmi_adc5 bluetooth qcom_vadc_common snd_soc_core venus_core snd_compress snd_pcm_dmaengine snd_pcm v4l2_mem2mem snd_timer snd qcom_spmi_temp_alarm videobuf2_v4l2 soundcore industrialio videobuf2_common videodev joydev mc hid_multitouch ecdh_generic ecc cfg80211 | |Jul 21 21:45:56 limitless kernel: [ 5533.893841] qcom_rng sg rfkill qrtr ns libarc4 qcom_q6v5_mss slim_qcom_ngd_ctrl qcom_q6v5_pas evdev pdr_interface qcom_pil_info qcom_q6v5 slimbus qcom_sysmon rmtfs_mem bam_dma qcom_wdt fuse configfs ip_tables x_tables autofs4 ext4 mbcache jbd2 msm rtc_pm8xxx llcc_qcom ti_sn65dsi86 ocmem i2c_hid_of drm_kms_helper ipa qcom_common qmi_helpers mdt_loader camcc_sdm845 panel_simple drm gpio_keys | |Jul 21 21:45:56 limitless kernel: [ 5533.894072] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 5.13.4 #1 | |Jul 21 21:45:56 limitless kernel: [ 5533.894087] Hardware name: LENOVO 81JL/LNVNB161216, BIOS 9UCN33WW(V2.06) 06/ 4/2019 | |Jul 21 21:45:56 limitless kernel: [ 5533.894098] Call trace: | |Jul 21 21:45:56 limitless kernel: [ 5533.894103] dump_backtrace+0x0/0x1e4 | |Jul 21 21:45:56 limitless kernel: [ 5533.894133] show_stack+0x24/0x30 | |Jul 21 21:45:56 limitless kernel: [ 5533.894150] dump_stack+0xd0/0x12c | |Jul 21 21:45:56 limitless kernel: [ 5533.894168] __schedule_bug+0x68/0x80 | |Jul 21 21:45:56 limitless kernel: [ 5533.894186] __schedule+0x74c/0x8ac | |Jul 21 21:45:56 limitless kernel: [ 5533.894202] schedule+0x54/0xe0 | |Jul 21 21:45:56 limitless kernel: [ 5533.894217] schedule_preempt_disabled+0x1c/0x2c | |Jul 21 21:45:56 limitless kernel: [ 5533.894234] __mutex_lock.constprop.0+0x55c/0x590 | |Jul 21 21:45:56 limitless kernel: [ 5533.894247] __mutex_lock_slowpath+0x1c/0x30 | |Jul 21 21:45:56 limitless kernel: [ 5533.894260] mutex_lock+0x6c/0x80 | |Jul 21 21:45:56 limitless kernel: [ 5533.894271] dev_pm_opp_find_freq_floor+0x4c/0x200 | |Jul 21 21:45:56 limitless kernel: [ 5533.894287] qcom_lmh_dcvs_notify+0x74/0x170 | |Jul 21 21:45:56 limitless kernel: [ 5533.894301] qcom_lmh_dcvs_handle_irq+0x30/0x44 | |Jul 21 21:45:56 limitless kernel: [ 5533.894313] __handle_irq_event_percpu+0x68/0x210 | |Jul 21 21:45:56 limitless kernel: [ 5533.894328] handle_irq_event+0x6c/0x1b0 | |Jul 21 21:45:56 limitless kernel: [ 5533.894340] handle_simple_irq+0xc8/0x170 | |Jul 21 21:45:56 limitless kernel: [ 5533.894355] generic_handle_irq+0x3c/0x5c | |Jul 21 21:45:56 limitless kernel: [ 5533.894368] lmh_handle_irq+0x40/0x50 | |Jul 21 21:45:56 limitless kernel: [ 5533.894383] __handle_irq_event_percpu+0x68/0x210 | |Jul 21 21:45:56 limitless kernel: [ 5533.894395] handle_irq_event+0x6c/0x1b0 | |Jul 21 21:45:56 limitless kernel: [ 5533.894407] handle_fasteoi_irq+0xcc/0x1fc | |Jul 21 21:45:56 limitless kernel: [ 5533.894421] __handle_domain_irq+0x88/0xec | |Jul 21 21:45:56 limitless kernel: [ 5533.894433] gic_handle_irq+0xc8/0x148 | |Jul 21 21:45:56 limitless kernel: [ 5533.894446] el1_irq+0xbc/0x140 | |Jul 21 21:45:56 limitless kernel: [ 5533.894458] arch_local_irq_enable+0xc/0x14 | |Jul 21 21:45:56 limitless kernel: [ 5533.894473] __schedule+0x2fc/0x8ac | |Jul 21 21:45:56 limitless kernel: [ 5533.894489] schedule_idle+0x34/0x54 | |Jul 21 21:45:56 limitless kernel: [ 5533.894504] do_idle+0x1a4/0x2b0 | |Jul 21 21:45:56 limitless kernel: [ 5533.894520] cpu_startup_entry+0x34/0xa0 | |Jul 21 21:45:56 limitless kernel: [ 5533.894536] rest_init+0xcc/0xdc | |Jul 21 21:45:56 limitless kernel: [ 5533.894550] arch_call_rest_init+0x1c/0x28 | |Jul 21 21:45:56 limitless kernel: [ 5533.894567] start_kernel+0x5b4/0x5ec | |Jul 21 21:45:56 limitless kernel: [ 5533.894954] ------------[ cut here ]------------ | |Jul 21 21:45:56 limitless kernel: [ 5533.894966] irq 156 handler qcom_lmh_dcvs_handle_irq+0x0/0x44 enabled interrupts | |Jul 21 21:45:56 limitless kernel: [ 5533.895005] WARNING: CPU: 0 PID: 0 at kernel/irq/handle.c:159 __handle_irq_event_percpu+0x1d8/0x210 | |Jul 21 21:45:56 limitless kernel: [ 5533.895028] Modules linked in: dm_mod loop tcp_diag inet_diag aes_ce_ccm rfcomm algif_hash algif_skcipher af_alg bnep lz4 lz4_compress q6asm_dai zram q6routing zsmalloc q6afe_dai q6adm q6asm q6afe q6dsp_common q6core snd_soc_wsa881x regmap_sdw snd_soc_wcd934x soundwire_qcom gpio_wcd934x binfmt_misc venus_enc venus_dec videobuf2_dma_contig nls_ascii nls_cp437 vfat fat wcd934x regmap_slimbus qrtr_smd fastrpc apr aes_ce_blk crypto_simd cryptd aes_ce_cipher crct10dif_ce ghash_ce gf128mul sha2_ce uvcvideo videobuf2_vmalloc videobuf2_memops hci_uart ath10k_snoc sha256_arm64 sha1_ce btqca ath10k_core ath btrtl mac80211 btbcm btintel snd_soc_sdm845 snd_soc_rt5663 snd_soc_qcom_common snd_soc_rl6231 soundwire_bus pm8941_pwrkey qcom_spmi_adc5 bluetooth qcom_vadc_common snd_soc_core venus_core snd_compress snd_pcm_dmaengine snd_pcm v4l2_mem2mem snd_timer snd qcom_spmi_temp_alarm videobuf2_v4l2 soundcore industrialio videobuf2_common videodev joydev mc hid_multitouch ecdh_generic ecc cfg80211 | |Jul 21 21:45:56 limitless kernel: [ 5533.895508] qcom_rng sg rfkill qrtr ns libarc4 qcom_q6v5_mss slim_qcom_ngd_ctrl qcom_q6v5_pas evdev pdr_interface qcom_pil_info qcom_q6v5 slimbus qcom_sysmon rmtfs_mem bam_dma qcom_wdt fuse configfs ip_tables x_tables autofs4 ext4 mbcache jbd2 msm rtc_pm8xxx llcc_qcom ti_sn65dsi86 ocmem i2c_hid_of drm_kms_helper ipa qcom_common qmi_helpers mdt_loader camcc_sdm845 panel_simple drm gpio_keys | |Jul 21 21:45:56 limitless kernel: [ 5533.895732] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 5.13.4 #1 | |Jul 21 21:45:56 limitless kernel: [ 5533.895747] Hardware name: LENOVO 81JL/LNVNB161216, BIOS 9UCN33WW(V2.06) 06/ 4/2019 | |Jul 21 21:45:56 limitless kernel: [ 5533.895756] pstate: 60400005 (nZCv daif +PAN -UAO -TCO BTYPE=--) | |Jul 21 21:45:56 limitless kernel: [ 5533.895771] pc : __handle_irq_event_percpu+0x1d8/0x210 | |Jul 21 21:45:56 limitless kernel: [ 5533.895785] lr : __handle_irq_event_percpu+0x1d8/0x210 | |Jul 21 21:45:56 limitless kernel: [ 5533.895798] sp : ffff800010003de0 | |Jul 21 21:45:56 limitless kernel: [ 5533.895805] x29: ffff800010003de0 x28: ffffc75e330a3b00 x27: ffffc75e32c02000 | |Jul 21 21:45:56 limitless kernel: [ 5533.895831] x26: ffff4900496e0600 x25: ffffc75e32c02000 x24: ffffc75e33099a20 | |Jul 21 21:45:56 limitless kernel: [ 5533.895856] x23: 000000000000009c x22: ffff800010003e74 x21: 0000000000000000 | |Jul 21 21:45:56 limitless kernel: [ 5533.895881] x20: 0000000000000000 x19: ffff490049c02900 x18: 00000000fffffffb | |Jul 21 21:45:56 limitless kernel: [ 5533.895905] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000020 | |Jul 21 21:45:56 limitless kernel: [ 5533.895929] x14: 727265746e692064 x13: 656c62616e652034 x12: 3478302f3078302b | |Jul 21 21:45:56 limitless kernel: [ 5533.895954] x11: ffffc75e3311a9b0 x10: 00000000fffff000 x9 : ffffc75e31abe5a0 | |Jul 21 21:45:56 limitless kernel: [ 5533.895978] x8 : ffffc75e330c29b0 x7 : ffffc75e3311a9b0 x6 : 0000000000000000 | |Jul 21 21:45:56 limitless kernel: [ 5533.896002] x5 : ffff4901b36fa9c8 x4 : ffff800010003bd0 x3 : 0000000000000001 | |Jul 21 21:45:56 limitless kernel: [ 5533.896026] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffffc75e330a3b00 | |Jul 21 21:45:56 limitless kernel: [ 5533.896050] Call trace: | |Jul 21 21:45:56 limitless kernel: [ 5533.896057] __handle_irq_event_percpu+0x1d8/0x210 | |Jul 21 21:45:56 limitless kernel: [ 5533.896072] handle_irq_event+0x6c/0x1b0 | |Jul 21 21:45:56 limitless kernel: [ 5533.896085] handle_simple_irq+0xc8/0x170 | |Jul 21 21:45:56 limitless kernel: [ 5533.896101] generic_handle_irq+0x3c/0x5c | |Jul 21 21:45:56 limitless kernel: [ 5533.896113] lmh_handle_irq+0x40/0x50 | |Jul 21 21:45:56 limitless kernel: [ 5533.896128] __handle_irq_event_percpu+0x68/0x210 | |Jul 21 21:45:56 limitless kernel: [ 5533.896141] handle_irq_event+0x6c/0x1b0 | |Jul 21 21:45:56 limitless kernel: [ 5533.896153] handle_fasteoi_irq+0xcc/0x1fc | |Jul 21 21:45:56 limitless kernel: [ 5533.896168] __handle_domain_irq+0x88/0xec | |Jul 21 21:45:56 limitless kernel: [ 5533.896180] gic_handle_irq+0xc8/0x148 | |Jul 21 21:45:56 limitless kernel: [ 5533.896193] el1_irq+0xbc/0x140 | |Jul 21 21:45:56 limitless kernel: [ 5533.896206] arch_local_irq_enable+0xc/0x14 | |Jul 21 21:45:56 limitless kernel: [ 5533.896221] __schedule+0x2fc/0x8ac | |Jul 21 21:45:56 limitless kernel: [ 5533.896238] schedule_idle+0x34/0x54 | |Jul 21 21:45:56 limitless kernel: [ 5533.896254] do_idle+0x1a4/0x2b0 | |Jul 21 21:45:56 limitless kernel: [ 5533.896269] cpu_startup_entry+0x34/0xa0 | |Jul 21 21:45:56 limitless kernel: [ 5533.896285] rest_init+0xcc/0xdc | |Jul 21 21:45:56 limitless kernel: [ 5533.896299] arch_call_rest_init+0x1c/0x28 | |Jul 21 21:45:56 limitless kernel: [ 5533.896316] start_kernel+0x5b4/0x5ec | |Jul 21 21:45:56 limitless kernel: [ 5533.896332] ---[ end trace 9b7875032d5e8e07 ]--- | |Jul 21 21:45:56 limitless kernel: [ 5533.896573] BUG: scheduling while atomic: swapper/0/0/0xffff0000 | |Jul 21 21:45:56 limitless kernel: [ 5533.896583] Modules linked in: dm_mod loop tcp_diag inet_diag aes_ce_ccm rfcomm algif_hash algif_skcipher af_alg bnep lz4 lz4_compress q6asm_dai zram q6routing zsmalloc q6afe_dai q6adm q6asm q6afe q6dsp_common q6core snd_soc_wsa881x regmap_sdw snd_soc_wcd934x soundwire_qcom gpio_wcd934x binfmt_misc venus_enc venus_dec videobuf2_dma_contig nls_ascii nls_cp437 vfat fat wcd934x regmap_slimbus qrtr_smd fastrpc apr aes_ce_blk crypto_simd cryptd aes_ce_cipher crct10dif_ce ghash_ce gf128mul sha2_ce uvcvideo videobuf2_vmalloc videobuf2_memops hci_uart ath10k_snoc sha256_arm64 sha1_ce btqca ath10k_core ath btrtl mac80211 btbcm btintel snd_soc_sdm845 snd_soc_rt5663 snd_soc_qcom_common snd_soc_rl6231 soundwire_bus pm8941_pwrkey qcom_spmi_adc5 bluetooth qcom_vadc_common snd_soc_core venus_core snd_compress snd_pcm_dmaengine snd_pcm v4l2_mem2mem snd_timer snd qcom_spmi_temp_alarm videobuf2_v4l2 soundcore industrialio videobuf2_common videodev joydev mc hid_multitouch ecdh_generic ecc cfg80211 | |Jul 21 21:45:56 limitless kernel: [ 5533.896746] qcom_rng sg rfkill qrtr ns libarc4 qcom_q6v5_mss slim_qcom_ngd_ctrl qcom_q6v5_pas evdev pdr_interface qcom_pil_info qcom_q6v5 slimbus qcom_sysmon rmtfs_mem bam_dma qcom_wdt fuse configfs ip_tables x_tables autofs4 ext4 mbcache jbd2 msm rtc_pm8xxx llcc_qcom ti_sn65dsi86 ocmem i2c_hid_of drm_kms_helper ipa qcom_common qmi_helpers mdt_loader camcc_sdm845 panel_simple drm gpio_keys | |Jul 21 21:45:56 limitless kernel: [ 5533.896819] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 5.13.4 #1 | |Jul 21 21:45:56 limitless kernel: [ 5533.896824] Hardware name: LENOVO 81JL/LNVNB161216, BIOS 9UCN33WW(V2.06) 06/ 4/2019 | |Jul 21 21:45:56 limitless kernel: [ 5533.896827] Call trace: | |Jul 21 21:45:56 limitless kernel: [ 5533.896829] dump_backtrace+0x0/0x1e4 | |Jul 21 21:45:56 limitless kernel: [ 5533.896838] show_stack+0x24/0x30 | |Jul 21 21:45:56 limitless kernel: [ 5533.896843] dump_stack+0xd0/0x12c | |Jul 21 21:45:56 limitless kernel: [ 5533.896849] __schedule_bug+0x68/0x80 | |Jul 21 21:45:56 limitless kernel: [ 5533.896855] __schedule+0x74c/0x8ac | |Jul 21 21:45:56 limitless kernel: [ 5533.896860] schedule_idle+0x34/0x54 | |Jul 21 21:45:56 limitless kernel: [ 5533.896866] do_idle+0x1a4/0x2b0 | |Jul 21 21:45:56 limitless kernel: [ 5533.896871] cpu_startup_entry+0x34/0xa0 | |Jul 21 21:45:56 limitless kernel: [ 5533.896876] rest_init+0xcc/0xdc | |Jul 21 21:45:56 limitless kernel: [ 5533.896881] arch_call_rest_init+0x1c/0x28 | |Jul 21 21:45:56 limitless kernel: [ 5533.896887] start_kernel+0x5b4/0x5ec|
On 7/21/21 11:14 PM, Steev Klimaszewski wrote: > Hi Thara! > > On 7/8/21 7:06 AM, Thara Gopinath wrote: >> Limits Management Hardware(LMh) is a hardware infrastructure on some >> Qualcomm SoCs that can enforce temperature and current limits as programmed >> by software for certain IPs like CPU. On many newer SoCs LMh is configured >> by firmware/TZ and no programming is needed from the kernel side. But on >> certain SoCs like sdm845 the firmware does not do a complete programming of >> the h/w block. On such SoCs kernel software has to explicitly set up the >> temperature limits and turn on various monitoring and enforcing algorithms >> on the hardware. >> >> Introduce support for enabling and programming various limit settings and >> monitoring capabilities of Limits Management Hardware(LMh) associated with >> cpu clusters. Also introduce support in cpufreq hardware driver to monitor >> the interrupt associated with cpu frequency throttling so that this >> information can be conveyed to the schdeuler via thermal pressure >> interface. >> >> With this patch series following cpu performance improvement(30-70%) is >> observed on sdm845. The reasoning here is that without LMh being programmed >> properly from the kernel, the default settings were enabling thermal >> mitigation for CPUs at too low a temperature (around 70-75 degree C). This >> in turn meant that many a time CPUs were never actually allowed to hit the >> maximum possible/required frequencies. >> >> UnixBench whets and dhry (./Run whets dhry) >> System Benchmarks Index Score >> >> Without LMh Support With LMh Support >> 1 copy test 1353.7 1773.2 >> >> 8 copy tests 4473.6 7402.3 >> >> Sysbench cpu >> sysbench cpu --threads=8 --time=60 --cpu-max-prime=100000 run >> >> Without LMh Support With LMh Support >> Events per >> second 355 614 >> >> Avg Latency(ms) 21.84 13.02 >> >> v2->v3: >> - Included patch adding dt binding documentation for LMh nodes. >> - Rebased to v5.13 >> >> Thara Gopinath (6): >> firmware: qcom_scm: Introduce SCM calls to access LMh >> thermal: qcom: Add support for LMh driver >> cpufreq: qcom-cpufreq-hw: Add dcvs interrupt support >> arm64: boot: dts: qcom: sdm45: Add support for LMh node >> arm64: boot: dts: qcom: sdm845: Remove cpufreq cooling devices for CPU >> thermal zones >> dt-bindings: thermal: Add dt binding for QCOM LMh >> >> .../devicetree/bindings/thermal/qcom-lmh.yaml | 100 ++++++++ >> arch/arm64/boot/dts/qcom/sdm845.dtsi | 162 ++---------- >> drivers/cpufreq/qcom-cpufreq-hw.c | 118 +++++++++ >> drivers/firmware/qcom_scm.c | 58 +++++ >> drivers/firmware/qcom_scm.h | 4 + >> drivers/thermal/qcom/Kconfig | 10 + >> drivers/thermal/qcom/Makefile | 1 + >> drivers/thermal/qcom/lmh.c | 239 ++++++++++++++++++ >> include/linux/qcom_scm.h | 14 + >> 9 files changed, 570 insertions(+), 136 deletions(-) >> create mode 100644 Documentation/devicetree/bindings/thermal/qcom-lmh.yaml >> create mode 100644 drivers/thermal/qcom/lmh.c >> > I've been using these patches on a 5.13 kernel > (https://github.com/steev/linux/tree/linux-5.13.y - while trying to > track down a different issue, while playing a video on youtube, as well > as compressing a 9.2GB file with xz, I got the following Hi Steev, Thanks for testing this. I was unable to reproduce this. I have posted v4 moving the interrupt handling in qcom-cpufreq-hw to threaded interrupt handler and hopefully this should fix the issue. It will be great if you can test and let me know.
On 7/27/21 10:29 AM, Thara Gopinath wrote: > > > On 7/21/21 11:14 PM, Steev Klimaszewski wrote: >> Hi Thara! >> >> On 7/8/21 7:06 AM, Thara Gopinath wrote: >>> Limits Management Hardware(LMh) is a hardware infrastructure on some >>> Qualcomm SoCs that can enforce temperature and current limits as >>> programmed >>> by software for certain IPs like CPU. On many newer SoCs LMh is >>> configured >>> by firmware/TZ and no programming is needed from the kernel side. >>> But on >>> certain SoCs like sdm845 the firmware does not do a complete >>> programming of >>> the h/w block. On such SoCs kernel software has to explicitly set up >>> the >>> temperature limits and turn on various monitoring and enforcing >>> algorithms >>> on the hardware. >>> >>> Introduce support for enabling and programming various limit >>> settings and >>> monitoring capabilities of Limits Management Hardware(LMh) >>> associated with >>> cpu clusters. Also introduce support in cpufreq hardware driver to >>> monitor >>> the interrupt associated with cpu frequency throttling so that this >>> information can be conveyed to the schdeuler via thermal pressure >>> interface. >>> >>> With this patch series following cpu performance improvement(30-70%) is >>> observed on sdm845. The reasoning here is that without LMh being >>> programmed >>> properly from the kernel, the default settings were enabling thermal >>> mitigation for CPUs at too low a temperature (around 70-75 degree >>> C). This >>> in turn meant that many a time CPUs were never actually allowed to >>> hit the >>> maximum possible/required frequencies. >>> >>> UnixBench whets and dhry (./Run whets dhry) >>> System Benchmarks Index Score >>> >>> Without LMh Support With LMh Support >>> 1 copy test 1353.7 1773.2 >>> >>> 8 copy tests 4473.6 7402.3 >>> >>> Sysbench cpu >>> sysbench cpu --threads=8 --time=60 --cpu-max-prime=100000 run >>> >>> Without LMh Support With LMh Support >>> Events per >>> second 355 614 >>> >>> Avg Latency(ms) 21.84 13.02 >>> >>> v2->v3: >>> - Included patch adding dt binding documentation for LMh nodes. >>> - Rebased to v5.13 >>> >>> Thara Gopinath (6): >>> firmware: qcom_scm: Introduce SCM calls to access LMh >>> thermal: qcom: Add support for LMh driver >>> cpufreq: qcom-cpufreq-hw: Add dcvs interrupt support >>> arm64: boot: dts: qcom: sdm45: Add support for LMh node >>> arm64: boot: dts: qcom: sdm845: Remove cpufreq cooling devices >>> for CPU >>> thermal zones >>> dt-bindings: thermal: Add dt binding for QCOM LMh >>> >>> .../devicetree/bindings/thermal/qcom-lmh.yaml | 100 ++++++++ >>> arch/arm64/boot/dts/qcom/sdm845.dtsi | 162 ++---------- >>> drivers/cpufreq/qcom-cpufreq-hw.c | 118 +++++++++ >>> drivers/firmware/qcom_scm.c | 58 +++++ >>> drivers/firmware/qcom_scm.h | 4 + >>> drivers/thermal/qcom/Kconfig | 10 + >>> drivers/thermal/qcom/Makefile | 1 + >>> drivers/thermal/qcom/lmh.c | 239 >>> ++++++++++++++++++ >>> include/linux/qcom_scm.h | 14 + >>> 9 files changed, 570 insertions(+), 136 deletions(-) >>> create mode 100644 >>> Documentation/devicetree/bindings/thermal/qcom-lmh.yaml >>> create mode 100644 drivers/thermal/qcom/lmh.c >>> >> I've been using these patches on a 5.13 kernel >> (https://github.com/steev/linux/tree/linux-5.13.y - while trying to >> track down a different issue, while playing a video on youtube, as well >> as compressing a 9.2GB file with xz, I got the following > > Hi Steev, > > Thanks for testing this. I was unable to reproduce this. I have posted > v4 moving the interrupt handling in qcom-cpufreq-hw to threaded > interrupt handler and hopefully this should fix the issue. It will be > great if you can test and let me know. > Hi Thara, I've been testing v4 for a little bit here, and so far I can't seem to get it to reproduce anymore. I will keep trying but fingers crossed that that did the trick. For setup, I'm using https://github.com/steev/linux/tree/linux-5.13.y with the "distro_defconfig" configuration here on my c630s. I'm also running https://github.com/steev/scheduler as a systemd service. So far I've been able to sleep/suspend without issue while running "make -j$(nproc) deb-pkg" in those kernel sources as well as `xz --memlimit-compress=50 -T 4 imagefile.img" on a 9.2GB file at the same time. One system is running the Budgie desktop on top of Xorg, and the other is running Gnome 3.38 on top of Wayland. -- steev
Limits Management Hardware(LMh) is a hardware infrastructure on some Qualcomm SoCs that can enforce temperature and current limits as programmed by software for certain IPs like CPU. On many newer SoCs LMh is configured by firmware/TZ and no programming is needed from the kernel side. But on certain SoCs like sdm845 the firmware does not do a complete programming of the h/w block. On such SoCs kernel software has to explicitly set up the temperature limits and turn on various monitoring and enforcing algorithms on the hardware. Introduce support for enabling and programming various limit settings and monitoring capabilities of Limits Management Hardware(LMh) associated with cpu clusters. Also introduce support in cpufreq hardware driver to monitor the interrupt associated with cpu frequency throttling so that this information can be conveyed to the schdeuler via thermal pressure interface. With this patch series following cpu performance improvement(30-70%) is observed on sdm845. The reasoning here is that without LMh being programmed properly from the kernel, the default settings were enabling thermal mitigation for CPUs at too low a temperature (around 70-75 degree C). This in turn meant that many a time CPUs were never actually allowed to hit the maximum possible/required frequencies. UnixBench whets and dhry (./Run whets dhry) System Benchmarks Index Score Without LMh Support With LMh Support 1 copy test 1353.7 1773.2 8 copy tests 4473.6 7402.3 Sysbench cpu sysbench cpu --threads=8 --time=60 --cpu-max-prime=100000 run Without LMh Support With LMh Support Events per second 355 614 Avg Latency(ms) 21.84 13.02 v2->v3: - Included patch adding dt binding documentation for LMh nodes. - Rebased to v5.13 Thara Gopinath (6): firmware: qcom_scm: Introduce SCM calls to access LMh thermal: qcom: Add support for LMh driver cpufreq: qcom-cpufreq-hw: Add dcvs interrupt support arm64: boot: dts: qcom: sdm45: Add support for LMh node arm64: boot: dts: qcom: sdm845: Remove cpufreq cooling devices for CPU thermal zones dt-bindings: thermal: Add dt binding for QCOM LMh .../devicetree/bindings/thermal/qcom-lmh.yaml | 100 ++++++++ arch/arm64/boot/dts/qcom/sdm845.dtsi | 162 ++---------- drivers/cpufreq/qcom-cpufreq-hw.c | 118 +++++++++ drivers/firmware/qcom_scm.c | 58 +++++ drivers/firmware/qcom_scm.h | 4 + drivers/thermal/qcom/Kconfig | 10 + drivers/thermal/qcom/Makefile | 1 + drivers/thermal/qcom/lmh.c | 239 ++++++++++++++++++ include/linux/qcom_scm.h | 14 + 9 files changed, 570 insertions(+), 136 deletions(-) create mode 100644 Documentation/devicetree/bindings/thermal/qcom-lmh.yaml create mode 100644 drivers/thermal/qcom/lmh.c